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www.murata-ps.com www.murata-ps.com/support for full details go to www.murata-ps.com/rohs $ uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 1 of 25 features ? high ef? ciency synchronous recti? er forward topology ? 18-75 volts dc wide input range with 3.3, 5 and 12 volts for output voltage ? up to 54 watts total output power with overtemperature shutdown ? tiny 1.31" x 0.91" x 0.36" open frame package ? industry standard dosa "brick" format and pinout ? extensive self-protection shut down features ? small footprint dc/dc converter, ideal for high current applications ? 2250 volt basic input/output isolation (48v models) ? operating temperature range -40 to +85 c with derating ? stable no-load operation with no required exter- nal components ? certi? ed to ul 60950-1, 2nd edition, en60950-1 safety approvals the world of brick dc/dc converters has seen a steady size reduction. the uws series makes another dramatic size shrink down to a sixteenth- brick width (0.91 inches) while still retaining a high power output and full 2250 volt dc isolation. the pc-board mount converter family accepts 18?to 75 volts dc inputs and delivers ? xed outputs regulated to within 0.125%. the uws converters are ideal for datacom and telecom applications, cell phone towers, data centers, server farms and network repeaters. uws outputs may be trimmed while delivering fast settling to current step loads and no adverse effects from higher capacitive loads. excellent ripple and noise speci? cations assure compatibility to cir- cuits using cpus, asics, programmable logic and fpgas. no minimum load is required. for systems requiring controlled startup/shutdown, an external remote on/off control may use a switch, transistor or digital logic. many self-protection features on the uws series avoid both converter and external circuit hazards. these include input undervoltage lockout and overtemperature shutdown. the output of these dc/dc converters have current limit using the hiccup autorestart technique and the outputs may be short-circuited inde? nitely. additional features include output overvoltage and reverse conduction elimination. the synchronous recti? er forward topology yields high ef? ciency for minimal heat buildup and no fan operation. product overview f1 external dc power source reference and error ampli?er t4xjudijoh t'jmufst t$vssfou4fotf -vout (4) +vout (8) 4fotf
4fotf
trim (6) on/off control (2) -vin (3) open = on $mptfe0gg +vin (1) 1ptjujwf mphjd
controller and power 5sbotgfs *tpmbujpo barrier typical topology is shown. murata power solutions recommends an external fuse. figure 1. connection diagram *sense is included on the uws-3.3/15-q48 and uws-5/10-q48. typical units fp ga n i i l d i i s ixteenth-brick d os a- c w ide input isolated dc/dc l units p roduct overview typ ic a
www.murata-ps.com/support part number structure uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 2 of 25 maximum rated output current current in amps sixteenth brick series nominal output voltage: uws - / - 12 4.5 n on/off control logic: n = negative p = positive ? please refer to the part number structure when ordering. ? all speci? cations are at nominal line voltage and full load, +25c unless otherwise noted. see detailed speci? cations. output capacitors are 1 f ceramic multilayer in parallel with 10 f. i/o caps are necessary for our test equipment and may not be needed for your application. ? regulation speci? cations describe output voltage deviations from a nominal/midpoint value to either extreme (50% load step). ? iout = 13a max. if vin < 36v. ? iout=8a max. if vin <36v. ? iout = 3.5a max. if vin < 36v. c rohs hazardous substance compliance (does not claim eu rohs exemption 7bClead in solder) c = rohs-6 - lx pin length option (thru-hole only) blank = standard pin length 0.180? (4.6mm) l1 = 0.110? (2.79mm)* l2 = 0.145? (3.68mm)* input voltage range: q48 = 18C75 volts (48v nominal) performance specifications summary and ordering guide m root model ? output input efficiency c76 package v out (v) i out (a, max.) power (w) r/n (mv pk-pk) regulation (max.) ? v in nom. (v) range (v) i in , no load (ma) i in , full load (a) typ. max. line load min. typ. case (inches) uws-3.3/15-q48 3.3 15 ? 49.5 90 125 0.15% 0.3% 48 18-75 25 1.16 87.5% 89% 1.31 x 0.91 x 0.36 uws-5/10-q48 5 10 ? 50 90 130 0.125% 0.125% 48 18-75 30 1.14 88% 91% 1.31 x 0.91 x 0.36 uws-12/4.5-q48 12 4.5 ? 54 115 150 0.125% 0.125% 48 18-75 25 1.24 89% 91% 1.31 x 0.91 x 0.36 m smt version (msl rating 2) blank = thru-hole m = smt version q48 *special quantity order is required; no sample quantities available. note: some model number combinations may not be available. please contact murata power solutions. h conformal coating option blank = no coating, standard h = coating added, optional* (built to order; contact murata power solutions for moq and lead times.)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 3 of 25 functional specifications, uws-3.3/15-q48 absolute maximum ratings conditions ? minimum typical/nominal maximum units input voltage, continuous full temperature range 0 80 vdc input voltage, transient operating or non-operating, 100 ms max. duration 0 100 vdc isolation voltage input to output tested 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on or off, referred to -vin 0 15 vdc output power 050w output current current-limited, no damage, short-circuit protected 0 15 a storage temperature range vin = zero (no power) -55 125 c absolute maximums are stress ratings. exposure of devices to greater than any of these conditions may adversely affect long-ter m reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied or recommended. input operating voltage range 18 48 75 vdc recommended external fuse fast blow 6 a start-up threshold rising input voltage 16.5 17 17.9 vdc undervoltage lockout falling input voltage 15 16.25 17.50 vdc overvoltage shutdown rising input voltage none vdc reverse polarity protection none, install external fuse none vdc internal filter type lc input current full load conditions vin = nominal 1.16 1.19 a low line vin = minimum, 13a load 2.63 2.72 a inrush transient 0.4 a2-sec. output in short circuit 100 200 ma no load input current iout = minimum, unit=on 25 60 ma shut-down mode input current (off, uv, ot) 510ma re? ected (back) ripple current ? measured at input with speci? ed ? lter 15 30 ma, pk-pk pre-biased startup external output voltage < vset monotonic general and safety ef? ciency vin=48v, full load 87.5 89 % vin=24v, full load 88.5 90.5 % isolation isolation voltage, input to output 2250 vdc insulation safety rating basic isolation resistance 100 m isolation capacitance 1300 pf safety certi? ed to ul-60950-1, iec/en60950-1, 2nd edition yes calculated mtbf per telcordia sr332, issue 1, class 3, ground ? xed, tambient=+25c 3.0 hours x 10 6 dynamic characteristics fixed switching frequency 250 280 310 khz power up startup time power on to vout regulated 30 ms on/off startup time remote on to vout regulated 30 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout 100 200 sec dynamic load peak deviation same as above, 180 240 mv features and options remote on/off control ? "n" suf? x negative logic, on state on=pin grounded or external voltage -0.1 0.8 vdc negative logic, off state off=pin open or external voltage 2.5 15 vdc control current open collector/drain, sourcing 1 2 ma "p" suf? x positive logic, on state on=pin open or external voltage 10 15 vdc positive logic, off state off=ground pin or external voltage 0 0.7 vdc control current open collector/drain 1 2 ma
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 4 of 25 output conditions ? minimum typical/nominal maximum units total output power see derating 0.0 49.5 50 w voltage nominal output voltage no trim 3.267 3.3 3.333 vdc setting accuracy at 50% load 1 % of vnom. output voltage range user-adjustable -10 10 % of vnom. overvoltage protection via magnetic feedback 4 4.3 4.9 vdc current output current range vin=18v-36v 0.0 13.0 a output current range vin=36v-75v 0.0 15.0 a minimum load no minimum load current limit inception 98% of vnom., after warmup 18.4 21.9 25.4 a short circuit short circuit current hiccup technique, autorecovery within 1.25% of vout 0.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation ? line regulation vin=min. to max., vout=nom., full load 0.15 % load regulation iout=min. to max., vin=48v 0.3 % ripple and noise with a 1uf || 10uf output caps 90 125 mv pk-pk with a 1uf || 100uf output caps 60 mv pk-pk temperature coef? cient at all outputs 0.02 % of vnom./c remote sense compensation 18 sense connected at load 10 % of vout maximum capacitive load constant resistance mode , low esr 0 10,000 f mechanical outline dimensions cxx case 1.31x0.91x0.36 inches (please refer to outline drawing) lxwxh 33.27x23.1x9.14 mm weight 0.48 ounces 13.6 grams through hole pin diameter 0.04 & 0.062 inches 1.016 & 1.575 mm through hole pin material copper alloy th pin plating metal and thickness nickel subplate 50 -inches gold overplate 5 -inches emi/rfi shielding none environmental operating ambient temperature range see derating, full power, natural convection -40 85 c operating case temperature range no derating, full power, natural convection -40 105 c storage temperature vin = zero (no power) -55 125 c thermal protection/shutdown measured in center 115 125 130 c electromagnetic interference external ? lter is required conducted, en55022/cispr22 b class radiated, en55022/cispr22 b class rohs rating ? rohs-6 functional specifications, uws-3.3/15-q48 (cont.)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 5 of 25 typical performance data, uws-3.3/15-q48 5 7 9 11 13 15 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0+ m/s (200+ lfm) 10 11 12 13 14 15 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 to 2.0 m/s (65 to 400 lfm) 10 11 12 13 14 15 16 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 to 2.0 m/s (65 to 400 lfm) 9 10 11 12 13 14 15 16 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0 m/s (200 lfm) 1.5+ m/s (400+ lfm) maximum current temperature derating at sea level (v in = 18 and v in = 24v, air? ow is from pin 3 to pin 1) maximum current temperature derating at sea level (v in = 60v, air? ow is from pin 3 to pin 1) power dissipation vs. load current @ 25 c maximum current temperature derating at sea level (v in = 36 and v in = 48v, air? ow is from pin 3 to pin 1) maximum current temperature derating at sea level (v in = 75v, air? ow is from pin 3 to pin 1) ef? ciency vs. line voltage and load current @ 25 c 0.8 1.8 2.8 3.8 4.8 5.9 6.9 7.9 8.9 9.9 10.9 12.0 13.0 14.0 15.0 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 vin = 36v vin = 75v vin = 18v vin = 24v load current (amps) ef?ciency (%) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 0.8 1.8 2.8 3.8 4.8 5.9 6.9 7.9 8.9 9.9 10.9 12.0 13.0 14.0 15.0 vin = 48v vin = 75v vin = 18v vin = 24v load current (amps) power dissipation (watts)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 6 of 25 typical performance data, uws-3.3/15-q48 output ripple and noise (vin=48v, vout=nom., iout=no load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) output ripple and noise (vin=48v, vout=nom., iout=15a, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) on/off enable delay (vin=48v, vout=nom., iout=15a, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=10,000 f, ta=+25c., scopebw=20mhz) thermal image with hot spot at full load current with 25 c ambient temperature. natural convention is used with no forced air? ow. identi? able and recommended maximum value to be veri? ed in application. vin=48v, q6 max temp=120 c/ipc9592 guidelines. step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) 52.0c 95.6c 60 70 80 90 q6a : 88 t1: 81 cr21: 82 q8: 83 (+vin) (+vout) (-vin) (-vout)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 7 of 25 functional specifications, uws-5/10-q48 absolute maximum ratings conditions ? minimum typical/nominal maximum units input voltage, continuous full temperature range 0 80 vdc input voltage, transient operating or non-operating, tested: 100 ms max. duration 0 100 vdc isolation voltage input to output 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on, referred to -vin 0 15 vdc output power 0 50.63 w output current current-limited, no damage, short-circuit protected 0 10 a storage temperature range vin = zero (no power) -55 125 c absolute maximums are stress ratings. exposure of devices to greater than any of these conditions may adversely affect long-ter m reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied or recommended. input operating voltage range 18 48 75 vdc recommended external fuse fast blow 5 a start-up threshold, turn on rising input voltage 16.5 17.5 17.9 vdc undervoltage shutdown, turn off falling input voltage 15 16.75 17.5 vdc overvoltage shutdown na vdc reverse polarity protection none, install external fuse none vdc internal filter type lc input current full load conditions vin = nominal 1.14 1.2 a low line vin = minimum 2.44 2.51 a inrush transient 0.4 a2-sec. output in short circuit 100 200 ma no load input current iout = minimum, unit=on 30 60 ma shut-down mode input current 510ma re? ected (back) ripple current ? no ? ltering 150 200 map-p re? ected (back) ripple current ? measured at input with speci? ed ? lter 15 30 map-p pre-biased startup external output voltage < vset monotonic general and safety ef? ciency vin=48v, full load 88 91 % vin=24v, full load 89.5 91 % isolation isolation voltage, input to output 2250 vdc insulation safety rating basic isolation resistance 100 m isolation capacitance 1000 pf safety (meets the following requirements) ul-60950-1, csa-c22.2 no.60950-1, iec/en60950-1, 2nd edition yes calculated mtbf per telcordia sr332, issue 1, class 3, ground ? xed, tambient=+25c 3.0 hours x 10 6 dynamic characteristics fixed switching frequency 225 275 325 khz startup time power on to vout regulated 30 ms startup time remote on to vout regulated 30 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout 100 200 sec dynamic load peak deviation same as above, 180 240 mv features and options remote on/off control ? "n" suf? x negative logic, on state on = pin grounded or external voltage -0.1 0.8 v negative logic, off state off = pin open or external voltage 2.5 15 v control current open collector/drain 1 2 ma "p" suf? x positive logic, on state on = pin open or external voltage 10 15 v positive logic, off state off = ground pin or external voltage 0 0.7 v control current open collector/drain 1 2 ma
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 8 of 25 output conditions ? minimum typical/nominal maximum units total output power see derating 0.0 50 50.63 w voltage nominal output voltage no trim 4.938 5 5.063 vdc setting accuracy at 50% load -1.25 1.25 % of vset output voltage range user-adjustable -20 10 overvoltage protection via magnetic feedback 6.2 6.4 6.6 vdc current output current range vin=18v to 36v 0 8 output current range vin=36v to 75v 0 10 a minimum load no minimum load current limit inception 98% of vnom., cold condition 11 13 15.5 a short circuit short circuit current hiccup technique, autorecovery within 1% of vout 0.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation ? line regulation vin=min. to max., vout=nom., nom load 0.125 v load regulation iout=min. to max 0.125 v ripple and noise with a 1uf || 10 uf output caps. 90 130 mv pk-pk with a 1uf || 100uf output caps 65 mv pk-pk temperature coef? cient at all outputs 0.02 % of vout./c remote sense compensation 18 sense connected at load 10 % of vout maximum capacitive loading (10% ceramic, 90% oscon) low esr 0 5000 f mechanical outline dimensions cxx case 1.31x0.91x0.36 inches (please refer to outline drawing) lxwxh 33.27x23.1x9.14 mm weight 0.48 ounces 13.6 grams through hole pin diameter diameter of pins standard .04 & .062 inches 1.016 & 1.575 mm through hole pin material gold-plated copper alloy with nickel underplate th pin plating metal and thickness nickel subplate 50 -inches gold overplate 5 -inches emi/rfi shielding none environmental operating ambient temperature range see derating curves -40 85 c storage temperature vin = zero (no power) -55 125 c operating case temp no derating required -40 105 c thermal protection/shutdown measured at hotspot 115 125 130 c electromagnetic interference external ? lter is required conducted, en55022/cispr22 b class radiated, en55022/cispr22 b class rohs rating ? rohs-6 functional specifications, uws-5/10-q48 (cont.) 19
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 9 of 25 typical performance data, uws-5/10-q48 4 5 6 7 8 9 10 11 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0 m/s (200 lfm) 1.5 m/s (300 lfm) 2.0 m/s (400 lfm) 3 4 5 6 7 8 9 10 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0 to 2.0 m/s (200-400 lfm) 4 5 6 7 8 9 10 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 to 2.0 m/s (65 to 400 lfm) 4 5 6 7 8 9 10 11 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0 m/s (200 lfm) 1.5 m/s (300 lfm) 2.0 m/s (400 lfm) maximum current temperature derating at sea level (v in = 18, air? ow is from pin 1 to pin 3) maximum current temperature derating at sea level (v in = 36, air? ow is from pin 1 to pin 3) maximum current temperature derating at sea level (v in = 24, air? ow is from pin 1 to pin 3) maximum current temperature derating at sea level (v in = 48v, air? ow is from pin 3 to pin 1) ef? ciency vs. line voltage and load current @ 25 c C vin = 36v-75v ef? ciency vs. line voltage and load current @ 25 c C vin = 18v-36v 60 65 70 75 80 85 90 95 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 vin = 60v vin = 75v vin = 36v vin = 48v load current (amps) ef?ciency (%) 72 74 76 78 82 84 80 86 88 90 92 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 vin = 36v vin = 18v vin = 24v load current (amps) ef?ciency (%)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 10 of 25 typical performance data, uws-5/10-q48 4 5 6 7 8 9 10 11 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0 m/s (200 lfm) 1.5 m/s (300 lfm) 2.0 m/s (400 lfm) 4 5 6 7 8 9 10 11 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0 m/s (200 lfm) 1.5 m/s (300 lfm) 2.0 m/s (400 lfm) maximum current temperature derating at sea level (v in = 60, air? ow is from pin 1 to pin 3) maximum current temperature derating at sea level (v in = 75 air? ow is from pin 1 to pin 3) power on starup delay (vin=0 to 48v, vout=nom, iout=10a, cload=0 uf, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout power on starup delay (vin=0 to 48v, vout=nom, iout=0a, cload=0 uf, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout on/off enable delay (vin=48v, vout=nom, iout=10a, cload=0 uf, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 11 of 25 typical performance data, uws-5/10-q48 output ripple and noise (vin=48v, vout=nom., iout=10a, cload=1 ufceramic || 10uf tantulum, ta=+25c., scopebw=20mhz) output ripple and noise (vin=48v, vout=nom., iout=0a, cload=1 ufceramic || 10uf tantu- lum, ta=+25c., scopebw=20mhz) step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=1 uf ceramic || 10uf tantalum, ta=+25c., scopebw=20mhz ch1=5vo, ch2=io 2amps\div) thermal image with hot spot at full load current with 25 c ambient temperature. natural convention is used with no forced air? ow. identi? able and recommended maximum value to be veri? ed in application. vin=48v, q6 max temp=120 c/ipc9592 guidelines. step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=680uf, ta=+25c., scopebw=20mhz ch1=5vo, ch2=io 2amps\div) 44.4c 98.2c 50 60 70 80 90 q6: 89 t1: 81 q8: 75 (+vin) (+vout) (-vin) (-vout)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 12 of 25 functional specifications, uws-12/4.5-q48 absolute maximum ratings conditions ? minimum typical/nominal maximum units input voltage, continuous full temperature range 0 80 vdc input voltage, transient operating or non-operating, 100 ms max. duration 0 100 vdc isolation voltage input to output tested 2250 vdc input reverse polarity none, install external fuse none vdc on/off remote control power on or off, referred to -vin 0 15 vdc output power 0 54.54 w output current current-limited, no damage, short-circuit protected 0 4.5 a storage temperature range vin = zero (no power) -55 125 c absolute maximums are stress ratings. exposure of devices to greater than any of these conditions may adversely affect long-ter m reliability. proper operation under conditions other than those listed in the performance/functional speci? cations table is not implied or recommended. input operating voltage range 18 48 75 vdc recommended external fuse fast blow 6 a start-up threshold rising input voltage 16.5 17.2 17.9 vdc undervoltage lockout falling input voltage 15 16.5 17.50 vdc overvoltage shutdown rising input voltage none vdc reverse polarity protection none, install external fuse none vdc internal filter type capacitive input current full load conditions vin = nominal 1.24 1.28 a low line vin = minimum , 3.5a load 2.55 2.63 a inrush transient 0.05 a2-sec. output in short circuit 100 200 ma no load input current iout = minimum, unit=on 25 60 ma shut-down mode input currrent (off, uv, ot) 510ma re? ected (back) ripple current ? measured at input with speci? ed ? lter 30 40 ma, pk-pk pre-biased startup external output voltage < vset monotonic general and safety ef? ciency vin=48v, full load 89 91 % vin=24v, full load 89.5 91.5 % isolation isolation voltage, input to output 2250 vdc insulation safety rating basic isolation resistance 100 m isolation capacitance 1000 pf safety (designed to meet the following requirements) ul-60950-1, iec/en60950-1, 2nd edition yes calculated mtbf ? per telcordia sr332, issue 1, class 3, ground ? xed, tambient=+25c 3.0 hours x 10 6 dynamic characteristics fixed switching frequency 200 230 260 khz power up startup time power on to vout regulated 30 ms on/off startup time remote on to vout regulated 30 ms dynamic load response 50-75-50% load step, settling time to within 1% of vout 250 300 sec dynamic load peak deviation same as above, 350 400 mv features and options remote on/off control ? "n" suf? x negative logic, on state on=pin grounded or external voltage -0.1 0.8 vdc negative logic, off state off=pin open or external voltage 2.5 15 vdc control current open collector/drain, sourcing 1 2 ma "p" suf? x positive logic, on state on=pin open or external voltage 10 15 vdc positive logic, off state off=pin grounded or external voltage 0 0.7 vdc control current open collector/drain, sinking 1 2 ma
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 13 of 25 output conditions ? minimum typical/nominal maximum units total output power see derating 0.0 54.0 54.54 w voltage nominal output voltage no trim 11.88 12.00 12.12 vdc setting accuracy at 50% load 1 % of vnom. output voltage range user-adjustable -20 10 % of vnom. overvoltage protection via magnetic feedback 13.3 15.3 18 vdc current output current range vin=18v-36v 0.0 3.5 a output current range vin=36v-75v 0.0 4.5 a minimum load no minimum load current limit inception 98% of vnom., after warmup 5.05 6.4 7.4 a short circuit short circuit current hiccup technique, autorecovery within 1.25% of vout 0.6 a short circuit duration (remove short for recovery) output shorted to ground, no damage continuous short circuit protection method current limiting regulation ? line regulation vin=min. to max., vout=nom., full load 0.125 % load regulation iout=min. to max., vin=48v 0.125 % ripple and noise with a 1uf || 10uf output caps 115 150 mv pk-pk temperature coef? cient at all outputs 0.02 % of vnom./c maximum capacitive load constant resistance mode, low esr 0 2200 f mechanical outline dimensions cxx case 1.31x0.91x0.36 inches (please refer to outline drawing) lxwxh 33.27x23.1x9.14 mm weight 0.48 ounces 13.6 grams through hole pin diameter 0.04 & 0.062 inches 1.016 & 1.575 mm through hole pin material copper alloy th pin plating metal and thickness nickel subplate 50 -inches gold overplate 5 -inches emi/rfi shielding none environmental operating ambient temperature range no derating, full power, natural convection -40 85 c operating case temperature range no derating, full power, natural convection -40 105 c storage temperature vin = zero (no power) -55 125 c thermal protection/shutdown measured in center 115 125 130 c electromagnetic interference external ? lter is required conducted, en55022/cispr22 b class radiated, en55022/cispr22 b class rohs rating ? rohs-6 functional specifications, uws-12/4.5-q48 (cont.)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 14 of 25 performance speci? cation notes 1. all speci? cations are typical unless noted. ambient temperature = +25celsius, v in is nominal, output current is maximum rated nominal. external output capacitance is 1 f multilayer ceramic paralleled with 10?f electrolytic. all caps are low esr. these capacitors are necessary for our test equipment and may not be needed in your application. testing must be kept short enough that the converter does not appreciably heat up during testing. for extended testing, use plenty of air? ow. see derating curves for temperature performance. all models are stable and regulate within spec without external cacacitance. 2. input ripple current is tested and speci? ed over a 5-20 mhz bandwidth and uses a special set of external ? lters only for the ripple current speci- ? cations. input ? ltering is c in = 33 f, c bus = 220 f, l bus = 12?h. use capacitor rated voltages which are twice the maximum expected voltage. capacitors must accept high speed ac switching currents. 3. note that maximum current derating curves indicate an average current at nominal input voltage. at higher temperatures and/or lower air? ow, the converter will tolerate brief full current outputs if the average rms current over time does not exceed the derating curve. all derating curves are presented at sea level altitude. be aware of reduced power dissipation with increasing density altitude. 4. mean time before failure (mtbf) is calculated using the telcordia (belcore) sr-332 method 1, case 3, issue 1, ground ? xed conditions. oper- ating temperature = +30c, full output load, natural air convection. 5. the output may be shorted to ground inde? nitely with no damage. the output short circuit current shown in the speci? cations is an average con- sisting of very short bursts of full rated current to test whether the output circuit can be repowered. 6. the on/off control is normally driven from a switch or relay. an open collector/open drain transistor may be used in saturation and cut-off (pinch-off) modes. external logic may also be used if voltage levels are fully compliant to the speci? cations. 7. regulation speci? cations describe the deviation as the input line voltage or output load current is varied from a nominal midpoint value to either extreme (50% load). 8. do not exceed maximum power ratings or output overvoltage when adjust- ing output trim values. 9. at zero output current, vout may contain components which slightly exceed the ripple and noise speci? cations. 10. output overload protection is non-latching. when the output overload is removed, the output will automatically recover. 11. all models are fully operational and meet published speci? cations, including cold start at C40c. 12. the converter will shut off if the input falls below the undervoltage thresh- old. it will not restart until the input exceeds the input start up voltage. 13. short circuit shutdown begins when the output voltage degrades approxi- mately 2% from the selected setting. 14. output noise may be further reduced by installing an external ? lter. see the application notes. use only as much output ? ltering as needed and no more . larger caps (especially low-esr ceramic types) may slow transient response or degrade dynamic performance. thoroughly test your applica- tion with all components installed. 15. to avoid damage or unplanned shutdown, do not sink appreciable reverse output current. 16. if reverse polarity is accidentally applied to the input, to ensure reverse input protection with full output load, always connect an external fast blow input fuse in series with the +v in input. 17. although extremely unlikely, failure of the internal components of this product may expose external application circuits to dangerous voltages, currents, temperatures or power levels. please thoroughly verify all ap- plications before committing them to service. be sure to include appropri- ately-rated fuses (see speci? cations and application notes) to reduce the risk of failure. 18. if remote sense is not used, connect it to its respective vout terminal. sense is included on uws-3.3/15-q48 and uws-5/10-q48 models only. 19 output ripple and noise for the uws-5/10-q48 model with a 1uf and 100uf tantalum output capacitor is 65mvp-p (typical).
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 15 of 25 typical performance data, uws-12/4.5-q48 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 load current (a) ef?ciency (%) vin = 18v vin = 24v vin = 48v vin = 75v 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) (65, 100, 200, 300, & 400 lfm) 0.33, 0.5, 1.0, 1.5, & 2.0 m/s 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) (65, 100, 200, 300, & 400 lfm) 0.33, 0.5, 1.0, 1.5, & 2.0 m/s 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) (65, 100, 200, 300, & 400 lfm) 0.33, 0.5, 1.0, 1.5, & 2.0 m/s 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 30 35 40 45 50 55 60 65 70 75 80 85 output current (amps) ambient temperature (oc) 0.33 m/s (65 lfm) 0.5 m/s (100 lfm) 1.0, 1.5, & 2.0 m/s (200, 300, & 400 lfm) 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 load current (a) power dissipation (w) vin = 18v vin = 24v vin = 48v vin = 75v ef? ciency vs. line voltage and load current @ 25 c maximum current temperature derating at sea level (vin = 18v, air ? ow from pin j1 to pin j3) maximum current temperature derating at sea level (vin = 48 air ? ow from pin j1 to pin j3 on pcb) power dissipation vs. load current @ 25 c maximum current temperature derating at sea level (vin = 24 air ? ow from pin j1 to pin j3 on pcb) maximum current temperature derating at sea level (vin = 75 air ? ow from pin j1 to pin j3 on pcb)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 16 of 25 typical performance data, uws-12/4.5-q48 output ripple and noise (vin=48v, vout=nom., iout=no load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) output ripple and noise (vin=48v, vout=nom., iout=4.5a, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) on/off enable delay (vin=48v, vout=nom., iout=no load, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout on/off enable delay (vin=48v, vout=nom., iout=4.5a, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=enable, trace 4=vout step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=1f ceramic || 10f tantalum, ta=+25c., scopebw=20mhz) step load transient response (vin=48v, vout=nom., iout=50-75-50% of full load, cload=2200 f, ta=+25c., scopebw=20mhz)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 17 of 25 typical performance data, uws-12/4.5-q48 power on startup delay (vin=0 to 48v, vout=nom., iout=no load, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout thermal image with hot spot at full load current with 25 c ambient temperature. natural convention is used with no forced air? ow. identi? able and recommended maximum value to be veri? ed in application. vin=48v, q6 and t1 max temp=120 c/ipc9592 guidelines. power on startup delay (vin=0 to 48v, vout=nom., iout=4.5a, cload=0 f, ta=+25c., scopebw=20mhz) trace 1=vin, trace 4=vout 49.8c 89.0c 50 60 70 80 q6: 82 t1: 82 q8: 73 (+vin) (+vout) (-vin) (-vout)
www.murata-ps.com/support mechanical specifications, through-hole mount .92 23.4 .100 min annular ring for all pin shoulders .300 7.62 .300 7.62 1.100 33.5 1.32 11.7 .46 14.0 .55 3.81 .150 3.81 .150 recommended footprint for thru-hole converter (view through converter) 1 2 3 4 8 c l finished hole sizes @ pins 4 & 8 (per ipc-d-275, level c) .070-.084 (sec) c l (pri) c l top view finished hole sizes @ pins 1-3, 6, 5*, 7* (per ipc-d-275, level c) .048-.062 5* 7* 6 uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 18 of 25 input/output connections p75 pin function pin function 3 negative input 4 negative output 5 negative sense* 2 on/off control 6 output trim 7 positive sense* 1 positive input 8 positive output * sense is included only on models uws-3.3/15-q48 and uws-5/10-q48. sense pins are omitted on other models. note that some competitive units may use different pin numbering or alternate outline views. however, all units are pinout compatible. standard pin length is shown. please refer to the part number structure for alternate pin lengths. it is recommended that no parts be placed beneath the converter. third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only and may vary between units. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? material: ? .040 pins: copper alloy ? .062 pins: copper alloy finish: (all pins) gold (5u"min) over nickel (50u" min) 0.550 (13.97) 0.300 (7.62) 0.300 (7.62) 0.150(3.81) 0.150 0.36 (9.14) pins 1-3, 6 pcb thickness (ref) case c76 side view end view bottom pin view @ 0.040 (1.02) max 0.116 (2.95) 0.18 (4.6) 0.062 (1.57) @ pins 4 & 8 3 c l 7 c l 1 2 6 8 4 5 1.100 (27.9) 1.31 (33.3) 0.91 (23.1) #3 pin pin #8 pin #4 keep-out area: do not mount components directly under the converter. seating plane
www.murata-ps.com/support mechanical specifications, surface mount (msl rating 2) .92 23.4 33.5 1.32 11.7 .46 14.0 .55 .070 min pad (6 or 8 places as required) 3.81 .150 3.81 .150 7 . 7.62 .300 27.94 1.100 recommended footprint (view through converter) 1 2 3 4 8 c l (sec) c l (pri) top view 5* 7* 6 uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 19 of 25 material: smt contacts: copper alloy finish: (all pins) gold (5u"min) over nickel (50u" min) input/output connections p75 pin function pin function 3 negative input 4 negative output 5 negative sense* 2 on/off control 6 output trim 7 positive sense* 1 positive input 8 positive output * sense is included only on models uws-3.3/15-q48 and uws-5/10-q48. sense pins are omitted on other models. note that some competitive units may use different pin numbering or alternate outline views. however, all units are pinout compatible. it is recommended that no parts be placed beneath the converter. third angle projection dimensions are in inches (mm) shown for ref. only. components are shown for reference only and may vary between units. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? c l 3 2 1 c l (ref) pin #8 pin #4 pcb thickness side view end view bottom pin view keep-out area: do not mount components directly under the converter. 0.550 (13.97) 0.300 (7.62) 0.300 (7.62) 0.36 (9.14) max 0.116 (2.95) 1.100 (27.9) 1.31 (33.3) seating plane .062 (1.57) typ (all pins) 0.150(3.81) 0.150 7 6 8 4 5 0.91 (23.1)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 20 of 25 shipping trays and boxes, through-hole mount corner spacer 13.79 (350) 12.6 (320) 11.42 (290) anti-static foam 2 cartons per box 128 units per carton 256 units total per box each tray is 4 x 8 units (32 units total per tray) all materials in contact with the units are anti-static protective. dimensions are in inches (mm). corrugated cardboard box label label 128 units 128 units shipping tray dimensions material: low density, closed cell polyethylene anti-static foam 4-c 0.26 (6.5) 0.87 (22.00) 0.59 (15.00) 0.91 (23.00) 9.84 (250.00) 9.84 (250.00) 0.47 (12.00) 0.24 (6.00) 0.51 (13.00) 1.34 (34.00) 1.97 (50.00) 0.31 (8.00) r0.31 (8.00) third angle projection dimensions are in milimeters. tolerances (unless otherwise speci?ed): .xx 0.5 .xxx 0.25 angles 2?
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 21 of 25 third angle projection dimensions are in inches (mm shown for ref. only). components are shown for reference only. tolerances (unless otherwise speci?ed): .xx 0.02 (0.5) .xxx 0.010 (0.25) angles 1? [2.0] 0.079 [18.92] 0.745 1.260 pitch 32.00 nozzle 6-8mm pick-up feed (unwind) direction ---- holes round holes pin #1 oblong 1.732 44.00 .069 1.75 .512 13.00 330.20 13.00 4.00 core 101.60 top cover tape [9.65] .38 ref tape and reel (200 units per reel) 1.73 ref 44.0 tape and reel information (msl rating 2)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 22 of 25 i/o filtering, input ripple current, and output noise all models in the uws series are tested/speci? ed for input re? ected ripple current and output noise using the speci? ed external input/output components/ circuits and layout as shown in the following two ? gures. external input capaci- tors (c in in figure 2) serve primarily as energy-storage elements, minimiz- ing line voltage variations caused by transient ir drops in conductors from backplane to the dc/dc. input caps should be selected for bulk capacitance (at appropriate frequencies), low esr, and high rms-ripple-current ratings. the switching nature of dc/dc converters requires that dc voltage sources have low ac impedance as highly inductive source impedance can affect system sta- bility. in figure 2, c bus and l bus simulate a typical dc voltage bus. your speci? c system con? guration may necessitate additional considerations. in critical applications, output ripple/noise (also referred to as periodic and random deviations or pard) may be reduced below speci? ed limits using ? lter- ing techniques, the simplest of which is the installation of additional external output capacitors. they function as true ? lter elements and should be selected for bulk capacitance, low esr and appropriate frequency response. all external capacitors should have appropriate voltage ratings and be located as close to the converter as possible. temperature variations for all relevant parameters should also be taken carefully into consideration. the most effective combination of external i/o capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. floating outputs since these are isolated dc/dc converters, their outputs are ? oating with respect to their input. designers will normally use the Coutput as the ground/ return of the load circuit. you can however, use the +output as ground/return to effectively reverse the output polarity. minimum output loading requirements uws converters employ a synchronous-recti? er design topology and all models regulate within spec and are stable under no-load to full load conditions. operation under no-load conditions however might slightly increase the output ripple and noise. input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. fuses should also be used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exists. for datel uws series dc/dc converters, we recommend the use of a fast blow fuse, installed in the ungrounded input supply line with a typical value about twice the maximum input current, calculated at low line with the converters minimum ef? ciency. all relevant national and international safety standards and regulations must be observed by the installer. for system safety agency approvals, the convert- ers must be installed in compliance with the requirements of the end- use safety standard, i.e. iec/en/ul60950-1. input reverse-polarity protection if the input voltage polarity is accidentally reversed, an internal diode will be- come forward biased and likely draw excessive current from the power source. if this source is not current limited or the circuit appropriately fused, it could cause permanent damage to the converter. input under-voltage shutdown and start-up threshold under normal start-up conditions, devices will not begin to regulate properly until the ramping-up input voltage exceeds the start-up threshold voltage. once operating, devices will not turn off until the input voltage drops below the under-voltage shutdown limit. subsequent re-start will not occur until the input is brought back up to the start-up threshold. this built in hysteresis prevents any unstable on/off situations from occurring at a single input voltage. start-up time the v in to v out start-up time is the time interval between the point at which the ramping input voltage crosses the start-up threshold and the fully loaded output voltage enters and remains within its speci? ed accuracy band. actual measured times will vary with input source impedance, external input capaci- tance, and the slew rate and ? nal value of the input voltage as it appears at the converter. the uws series implements a soft start circuit to limit the duty cycle of its pwm controller at power up, thereby limiting the input inrush current. the on/off control to v out start-up time assumes the converter has its nominal input voltage applied but is turned off via the on/off control pin. the speci? cation de? nes the interval between the point at which the converter is turned on (released) and the fully loaded output voltage enters and remains within its speci? ed accuracy band. similar to the v in to v out start-up, the on/off control to v out start-up time is also governed by the internal soft start circuitry and external load capacitance. the difference in start up time from v in to v out and from on/off control to v out is therefore insigni? cant. input source impedance the input of uws converters must be driven from a low ac-impedance source. the dc/dcs performance and stability can be compromised by the use of highly inductive source impedances. the input circuit shown in figure 2 is a practical solution that can be used to minimize the effects of inductance in the input traces. for optimum performance, components should be mounted close to the dc/dc converter. c in v in c bus l bus c in = 33f, esr < 700m 7 @ 100khz c bus = 220f, esr < 100m 7 @ 100khz l bus = 12h +input Cinput current probe to oscilloscope + C figure 2. measuring input ripple current technical notes
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 23 of 25 remote sense (models uws-3.3/15-q48 and uws-5/10-q48 only) note: the sense and v out lines are internally connected through low-value resistors. nevertheless, if the sense function is not used for remote regulation the user should connect the +sense to +v out and Csense to Cv out at the dc/ dc converter pins. uls series converters employ a sense feature to provide point of use regulation, thereby overcoming moderate ir drops in pcb conduc- tors or cabling. the remote sense lines carry very little current and therefore require minimal cross-sectional-area conductors. the sense lines, which are capacitively coupled to their respective output lines, are used by the feedback control-loop to regulate the output. as such, they are not low impedance points and must be treated with care in layouts and cabling. sense lines on a pcb should be run adjacent to dc signals, preferably ground. [v out (+)-v out (C)] C [sense(+)-sense(C)] d 10%v out in cables and discrete wiring applications, twisted pair or other techniques should be used. output over-voltage protection is monitored at the output volt- age pin, not the sense pin. therefore, excessive voltage differences between v out and sense in conjunction with trim adjustment of the output voltage can cause the over-voltage protection circuitry to activate (see performance speci- ? cations for over-voltage limits). power derating is based on maximum output current and voltage at the converters output pins. use of trim and sense func- tions can cause output voltages to increase, thereby increasing output power beyond the converters speci? ed rating, or cause output voltages to climb into the output over-voltage region. therefore, the designer must ensure: (v out at pins) x (i out ) d rated output power load +output Cinput sense current contact and pcb resistance losses due to ir drops contact and pcb resistance losses due to ir drops sense return +input on/off control trim +sense Coutput Csense i out return i out figure 4. remote sense circuit con? guration sense is included only on models uws-3.3/15-q48 and uws-5/10-q48. thermal shutdown the uws converters are equipped with thermal-shutdown circuitry. if environ- mental conditions cause the temperature of the dc/dc converter to rise above the designed operating temperature, a precision temperature sensor will power down the unit. when the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. see performance/functional speci? cations. output over-voltage protection the uws output voltage is monitored for an over-voltage condition using a com- parator. the signal is optically coupled to the primary side and if the output volt- age rises to a level which could be damaging to the load, the sensing circuitry will power down the pwm controller causing the output voltage to decrease. following a time-out period the pwm will restart, causing the output voltage to ramp to its appropriate value. if the fault condition persists, and the output voltage again climbs to excessive levels, the over-voltage circuitry will initiate another shutdown cycle. this on/off cycling is referred to as hiccup mode. current limiting as soon as the output current increases to approximately 130% of its rated value, the dc/dc converter will go into a current-limiting mode. in this condi- tion, the output voltage will decrease proportionately with increases in output current, thereby maintaining somewhat constant power dissipation. this is commonly referred to as power limiting. current limit inception is de? ned as the point at which the full-power output voltage falls below the speci? ed tolerance. see performance/functional speci? cations. if the load current, being drawn from the converter, is signi? cant enough, the unit will go into a short circuit condition as described below. short circuit condition when a converter is in current-limit mode, the output voltage will drop as the output current demand increases. if the output voltage drops too low, the mag- netically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the pwm controller. following a time-out period, the pwm will restart causing the output voltage to begin ramping to their appropri- ate value. if the short-circuit condition persists, another shutdown cycle will be initiated. this on/off cycling is referred to as hiccup mode. the hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. the uws series is capable of enduring an inde? nite short circuit output condition. c1 c1 = 1f c2 = 10f load 2-3 inches (51-76mm) from module c2 r load scope +output Coutput +sense Csense figure 3. measuring output ripple/noise (pard)
www.murata-ps.com/support uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 24 of 25 output voltage adjustment down r t (k : ) = where % _ ( 100 ) _ C 10.22 % 511 trim down trim equations trim up up rt (k : ) = C 1.225 % 5.11 v out (100 + %) % 511 C 10.22 v out C v nom v nom where % _ ( 100 ) _ v out C v nom v nom note: % is always a positive value. v nom is the nominal, rated output voltage. v out is the desired, changed output voltage. figure 6. trim connections to increase output voltages load r trim up +output Cinput +input on/off control trim +sense Coutput Csense load r trim down +output Cinput +input on/off control trim +sense Coutput Csense figure 7. trim connections to decrease output voltages sense is included on uws-3.3/15-d48 and uws-5/10-q48. connect trim to the respective vout pin if sense is not installed. +vcc 13v circuit 5v circuit Ci n p u t o n /o f f c o n tr o l +input figure 5. driving the negative logic on/off control pin (simpli? ed circuit) on/off control the input-side, remote on/off control function can be ordered to operate with either logic type: positive ("p" suf? x) logic models are enabled when the on/off pin is left open or is pulled high (see speci? cations) with respect to the Cinput as per figure 4. positive-logic devices are disabled when the on/off pin is pulled low with respect to the Cinput. negative (n suf? x) logic devices are off when the on/off pin is left open or is pulled high (see speci? cations), and on when the pin is pulled low with respect to the Cinput. see speci? cations. dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). the drive circuit should be able to sink appropriate current (see performance speci? cations) when activated and withstand ap- propriate voltage when deactivated. applying an external voltage to pin 2 when no input power is applied to the converter can cause permanent damage to the converter.
www.murata-ps.com/support murata power solutions, inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. the descriptions contained her ein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are subject to cha nge without notice. ? 2012 murata power solutions, inc. murata power solutions, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 u.s.a. iso 9001 and 14001 registered this product is subject to the following operating requirements and the life and safety critical application sales policy : refer to: http://www.murata-ps.com/requirements/ uws series sixteenth-brick dosa-compatible, wide input isolated dc/dc converters mdc_uws series.b02 page 25 of 25 through-hole soldering guidelines murata power solutions recommends the th soldering speci? cations below when install- ing these converters. these speci? cations vary depending on the solder type. exceeding these speci? cations may cause damage to the product. your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. wave solder operations for through-hole mounted products (thmt) for sn/ag/cu based solders: maximum preheat temperature 115 c. maximum pot temperature 270 c. maximum solder dwell time 7 seconds for sn/pb based solders: maximum preheat temperature 105 c. maximum pot temperature 250 c. maximum solder dwell time 6 seconds smt re? ow soldering guidelines the surface-mount re? ow solder pro? le shown below is suitable for sac305 type lead- free solders. this graph should be used only as a guideline . many other factors in? uence the success of smt re? ow soldering. since your production environment may differ, please thoroughly review these guidelines with your process engineers. figure 8. vertical wind tunnel ir video camera ir transparent optical window variable speed fan heating element ambient temperature sensor air?ow collimator precision low-rate anemometer 3 below uut unit under test (uut) vertical wind tunnel murata power solutions employs a computer controlled custom- designed closed loop vertical wind tunnel, infrared video camera sys- tem, and test instrumentation for accurate air? ow and heat dissipa- tion analysis of power products. the system includes a precision low ? ow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges, and adjustable heating element. the ir camera monitors the thermal performance of the unit under test (uut) under static steady-state conditions. a special optical port is used which is transparent to infrared wavelengths. both through-hole and surface mount converters are soldered down to a host carrier board for realistic heat absorption and spread- ing. both longitudinal and transverse air? ow studies are possible by rotation of this carrier board since there are often signi? cant differ- ences in the heat dissipation in the two air? ow directions. the combi- nation of adjustable air? ow, adjustable ambient heat, and adjustable input/output currents and voltages mean that a very wide range of measurement conditions can be studied. the collimator reduces the amount of turbulence adjacent to the uut by minimizing air? ow turbulence. such turbulence in? uences the effective heat transfer characteristics and gives false readings. excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. both sides of the uut are studied since there are different thermal gradients on each side. the adjustable heating element and fan, built-in temperature gauges, and no-contact ir camera mean that power supplies are tested in real-world conditions.

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