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rev.1.0 may 7 ,2013 page 1 of 14 r2a20050ans lithium-ion battery charger control ic datasheet r03ds0071ej0100 rev.1.0 may 7 ,2013 r03ds0071ej0100 description r2s20050ans is a semiconductor integrated circuit de signed for lithium-ion battery charger control ic. built-in constant current and constant voltage control circuit allows for charging lithium-ion battery. features - available for 4.2v battery - built-in high accuracy reference vo ltage (charge voltage) 4.20v ? 30mv(at ta=25degc) - constant current and consta nt voltage control function - battery connection detection function - built-in adaptor detection function - built-in recharge function - built-in thermistor interface fo r battery temperature detection - built-in chip temperature detection function - substantial protection functions - safety timer - overdischarge protection - overvoltage protection - charge prohibition protection for over voltage and overdischarge battery. - thermal shutdown function - erroneous detection protection - built-in led display function application for dsc, cellular phone, pda, portable memory audi o player, handheld game machine, and others. pin arrangement outline10pin dfn vcc th gnd led vdd rosc tmrcnt richg vsense bat
r2a20050ans page 2 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 block diagram pin description no pin name i/o function protection diode positive negative 1vcci power supply & charge transistor input - gnd 2rosco oscillation frequency adjustment vcc gnd 3 led o led drive (under charge : on [h]) vcc gnd 4 gnd o ground -- 5 vdd 0 reference voltage terminal for battery temperature detection vcc gnd 6thi battery temperature detection terminal (thermistor connection terminal) vcc gnd 7 tmrcnt i timer on/off control h:timer stop l or open: timer permission - gnd 8richgi for setting the charge current value vcc gnd 9vsencei battery voltage detection & constant voltage charge control - gnd 10 bat o charge transistor output (charge current output) - gnd - + - + vcc cc control cv control richg vsense vref reference voltage bias circuit vref - + vcc vsense uvlo charge start voltage logicvdd - + completion current detection vref richg - + vsense osc charge logic charge control timer led control vcc gnd th vsense richg bat vsense led vdd gate control circuit thermal shutdown adaptor detection adp vref vref over voltage detection completion voltage detection trickle/quick charge switch detection vsense recharge detection rosc tmrcnt vref *) path-transistor includes the function that prevents negative current from bat to vcc. logicvdd vdd vdd por vref logicvdd vdd high temperature detection low temperature detection
r2a20050ans page 3 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 absolute maximum ratings item symbol ratings unit remark maximum applied voltage vmax -0.3~6.5 v all terminal allowable power dissipation * pd 2250 mw when ic is mounted on a board in the conditions below. this value will change depending upon the material of a board, wind speed, etc. operating temperature range topr -20~+75 degc storage temperature range tstg -40~+125 degc output current iout 1.5 a led input current iled 20 ma (ta=25degc, vcc=5v, unless otherwise specified.) thermal derating curve ambient temperature ta(degc) internal power dissipation pd (mw) * board material : fr-4 board size : 40 x 40 x 1.6mm cu share : 50% wind velocity : 0m/sec. ambient temperature : 25degc 1800 900 0 0 50 100 150 125 25 75 450 1350 2250 1125
r2a20050ans page 4 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 electrical characteristics block item symbol condition rated value unit min typ max all power supply voltage range vcc 4.0 5.0 5.8 v circuit current icc under charge (charge current = 500ma) -3.04.5ma adaptor detection voltage vadp 3.6 3.8 4.0 v battery discharge current *) ibatout vbat=1.1~4.2v:when ad aptor is not connected or charge is completed(adp=4.8v). -1.02.0ua vsense discharge current 1 idischg 1 vbat=3.2v :in charge error mode -1020ua reference voltage for battery temperature detection vdd vdd terminal voltage 2.4 2.5 2.6 v battery voltage detection block charge start voltage (overdischarge protection) vstart battery connection detection is shared. (charge is not done to the battery under charge start voltage. ) 1.0 1.1 1.2 v charge start voltage hysteresis vstarthys b attery disconnection detection is shared. 50 100 150 mv quick charge start voltage vqchgon detect ed voltage at battery voltage rise 2.9 3.0 3.1 v quick charge start voltage hy steresis vqchghys detected volta ge at battery voltage drop 40 80 120 mv recharge start voltage vrechg 3.87 3.97 4.07 v charge control voltage vchg 4.17 4.20 4.23 v overvoltage detection voltage vov vadp=vov+70mv 4.27 4.35 4.43 v battery temperature detection block charge stop temperature detection voltage (low temp.) vthsl detected voltage at battery temperature falling (lower temp. side) : worth 2 degc. vdd* 0.6966 vdd* 0.7142 vdd* 0.7313 v charge re-start temperature detection voltage (low temp.) vthrl detected voltage at battery temperature rising (lower temp. side) : worth 4 degc. vdd* 0.6787 vdd* 0.6966 vdd* 0.7141 v charge stop temperature detection voltage (high temp.) vthsh detected voltage at battery temperature rising (higher temp. side) : worth 43 degc. vdd* 0.3296 vdd* 0.3448 vdd* 0.3604 v charge re-start temperature detection voltage (high temp.) vthrh detected voltage at battery temperature falling (higher temp. side) : worth 38 degc. vdd* 0.3684 vdd* 0.3847 vdd* 0.4014 v charge current detection block quick charge current 1 (1.0c) irapchg1 richg=2.32kohm, vbat=3.6v 520 560 600 ma trickle charge control current 1(0.1c ) iprechg1 richg=2.32kohm, vbat=2.6v 40 56 72 ma forced charge current (0 .3c) istart richg=2.32kohm 120 170 220 ma charge completion current ifc richg=2.32kohm, vbat>4.0v 40 56 72 ma timer circuit block oscillation frequency foc rosc=100kohm 57.6 64 70.4 khz led blinking cycle fled rosc=100kohm, in charge error mode (design guarantee) 0.922 1.024 1.126 sec quick charge timer tchg time from quick charge start to charge completion judgment (rosc=100kohm) 270 300 330 min trickle charge timer tdchg time from trickl e charge start to quick charge start (rosc=100kohm) 54 60 66 min led control block led terminal output?h? voltage vledh isource=10ma vcc-0.6 - - v led terminal leakage current iledleak vled=5v -1 - 1 ua others tmrcnt terminal ?l? voltage vtmrl --0.5v tmrcnt terminal ?h? voltage vtmrh 2.0 - - v tmrcnt terminal input current itmr vin=5.0v - - 10 ua chip temperature detection ttreg ch ip temperature (design guarantee) 83 93 103 degc chip temperature detection hysteresis ttre ghys for releasing the thermal regulation 51015degc chip temperature reset detection ttreg rst chip temperature (design guarantee) 110 120 130 degc thermal shutdown temperature tsd chip temperature (design guarantee) 150 degc charge tr on resistance ron cont ains package l ead resistance - 0.45 0.6 ohm (ta=25degc, vcc=5v, unless otherwise specified.)
r2a20050ans page 5 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 flow chart vbat>vstart(1.1v) (connection) vbatvqchgon(3.0v) adaptor detection (tadp) vpor(2.5v)vadp(3.8v) adp input (start) power-on reset forced charge on : tistart forced charge off : toff vbatvov(4.35v) j battery non-connection mode led off, charge stop, built-in charge sw off, timer reset adaptor detection (tadp) battery connection detection (tcon) h h built-in charge sw off. trickle charge timer count is interrupted. g j vqchgon(3.0v)-vqchghys(0.1v) vchg(4.2v) b led continues to be on d charge completion current detection (tifc) e ichgifc led continues to be on (vbat discharge : tdischg) when vcc<2.5v are detected, each state and mode are reset and returns to start. vpor(2.5v)vadp(3.8v) vcc>vadp(3.8v) vcc>vadp(3.8v) vbat>vov(4.35v) vbat>vov(4.35v) vbatvstart-0.1v (connection) vbat>vstart-0.1v (connenction) vbat>vstart(1.1v) (connection) vbat>vqchgon(3.0v) vbatvthsh tbatvthrh tbatvthsh tbatvthsh tbatvthrh tbatvthrh tbat r2a20050ans page 6 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 quick charge timer count is continued from constant voltage charge mode d c charge completion current detection (tifc) charge stop, built-in charge sw off charge completion judgment mode charge complete quick charge timer reset e c charge error mode recharge mode f led off g led blinking cycle : fled (duty=dled) vchg(4.2v)vstart-0.1v (connection) vbatifc(0.1c) ichgvadp(3.8v) vcc>vadp(3.8v) vcc>vadp(3.8v) vbat>vov(4.35v) vbat>vov(4.35v) vbatvstart-0.1v (connection) vbat>vstart-0.1v (connection) vbat>vstart-0.1v (connection) vbat>vstart-0.1v (connection) vbatvov(4.35v) tbat>vthsh tbatvthrh tbatvthsh tbatvthrh tbat r2a20050ans page 7 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 timing chart trickle charge timer (60min.) progress flag timer stop timer stop 3.0v 4.2v 3.97v charge completion current trickle charge charge completion re-charge completion battery connection detection constant voltage charge bat terminal voltage : actual battery voltage + inte rnal resistance x charge current actual battery voltage re-charge start quick charge current setting value(1.0c) trickle charge current (0.1c) on off off on led battery voltage charge current quick charge ta=85degc ta=27degc ta=0degc forced charge timer stop forced charge current (0.3c) trickle charge current (0.1c) or quick charge current (1.0c) forced charge on 512ms vbat discharge adaptor detection battery overvoltage detection led 32ms 64ms forced charge off quick charge start voltage detection time 128ms vbat discharge 64ms 128ms off on charge current adaptor input timing chart from adaptor-input to charge-start (tdischg) (tadp) (tistart) (tdischg) (toff) (tqstart) (7.68sec)* (25.1sec)* 0.2c 0.3c note: each detection time is the reference value at rosc=100kohm. *) rosc=100kohm 128ms battery temperature detection (tpro) quick charge timer (300min.) progress flag battery voltage is detected after forced charge=off. vbat<3.0v : shift to trickle charge mode vbat>3.0v : shift to quick charge mode
r2a20050ans page 8 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 operational description adaptor detection adaptor connection is detected. vcc>3.8v : adapter connection is detected to be connected. (charge permission) vcc<2.5v : adapter connection is detected to be disconnected. (mode is reset and returns to start.) each detecting operation during adaptor detection is as follows. - battery connection/disconnection : count valid (continues to detect without suspending.) - quick charge start voltage detection : count suspended - charge completion current/voltage detection : count suspended - recharge start voltage detection : count suspended - chip temperature detection : count reset (when adaptor is detected in quick charge mode , ic starts to charge at 0.2c.(vcc>vadp)) during below charge off time, ic continues to count even if the adaptor is detected. - forced charge off time afte r forced charge completed. - charge off time from quick ch arge to charge completion. - charge off time from charge completion to quick charge. when adaptor is detected in for ced charge mode, forced charge m ode is reset and it is restarted after released adaptor detection. battery connect detection when adapter is detected, forced charge (0.3c) is started for canceling the cutoff state of battery due to overdischarge protection. then, forced charge is stopped and battery connection is detected. battery connection detection has a hysteresis charact eristic and the battery disconnection judgment voltage after battery connection detection is ba ttery connection detection voltage -100mv. 1) battery connect detection - battery voltage(bat)>1.1v : battery connection is detected to be connected, and charge is started. - battery voltage(bat)<1.1v : battery connection is de tected to be disconnected (overdischarge protection) ,and charge stops. 2) battery disconnect detection (under charge) - when the battery is disconnected under charge, the state shif ts to cv control mode (charge current does not flow). therefore, the state shifts to charge completion judgment mode. in this time, built-in charge transistor is to be off, and bat terminal voltage falls. when bat terminal < 1.0v, battery connection is detected to be disconnected, and charge stops. ,and the state shifts to battery non-connection mode. (overdischarge protection) 3) battery disconnect detection (when charge is stopped) - in this condition, when the battery connection is detected to be disconnected, bat terminal voltage falls. because built-in charge tr ansistor is already off. when bat terminal < 1.0v, battery connection is detected to be disconnected ,and the state shifts to battery non-connection mode. (overdischarge protection) trickle charge (0.1c constant current charge) after adaptor connection judgment and battery connection judgment, trickle charge is started when battery voltage is as follows. 1.1v 3.0v, the state shifts to quick charge mode. - trickle charge timer operates simulta neously with trickle charge start. - after trickle charge timer expires, when battery voltage < 3.0v, the state shifts to charge error mode. - when adaptor voltage is battery voltage or less, charge stops. - when battery voltage >4.35v(overvoltage), the state shifts to charge error mode.
r2a20050ans page 9 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 quick charge (1.0c constant current charge) quick charge is started when battery voltage > 3.0v. during the quick charge mode, vsense terminal is discharged by 300ua current. - when battery voltage is detected to be 4.2v, the state shifts to cv charge mode. - quick charge timer operates simultaneously with quick charge start. - after quick charge timer expires, when the state is not in charge completion mode , it shifts to a charge error mode. - when battery voltage is detected to be less than 2.92v, the state shifts to trickle charge mode. - when adaptor voltage is detected to be battery voltage or less, charge stops. - when battery voltage is detected to be 4.35v or more, the state shifts to charge error mode. during quick charge, junction temperature is monitored to limit charge current value between 0.2c-1.0c so that the junction temperature may not exceed ttreg. charge current 1.0c = [ reference voltage(1.495v) / richg ] x (820~920) * (ma) * the coefficient changes by the charging current. constant voltage charge when battery voltage is detected to be 4.2v under quick charge, constant voltage charge of 4.2v is started. - if the charge current falls to charge completion current or less under constant voltage charge, the state shifts to charge completion judgment mode. - when 3.0v < battery voltage < 4.2v is detected, the state shifts to quick charge mode. - when adapter voltage is detected to be battery voltage or less, charge stops. - when battery voltage is detected to be 4.35v or more (overvoltage), the state shifts to charge error mode. reference : charge current setting (subject to change) richg resistor(kohm) quick charge current setting(1.0c)(ma) 1.30 1000 1.40 900 1.59 800 1.85 700 2.15 600 2.63 500 3.30 400 4.40 300 6.70 200
r2a20050ans page 10 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 charge completion judgment mode when battery voltage >3.0v and charge current < charge completion current , the state shifts to charge completion judgment mode. during charge completion judgment mode, charge transistor is turned off and battery voltage is monitored. battery voltage after charge transistor is off : - when battery voltage>2.92v, charge completes. - when 1.1v r2a20050ans page 11 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 built-in erroneous detection protection the judgment result is decided delayed by the built-in erroneous detec tion protection circuit. each detection delay time is set by the internal clock. refer to page-5 ?detection time?about each detection time. led control block led lighting specification is as below. led lighting table mode led standby off under charge on charge completion off recharge on charge error blink battery temperature protection off item symbol reference value adaptor detection time 1 (when rising) tadp1 8msec x 4 times = 32msec adaptor detection time 2 (when falling) tadp2 8msec x 4 times = 32msec vcc/bat voltage comparison - non detection time (judged immediately) battery connect detection time tcon 32msec x 4 times = 128msec quick charge start voltage detection time tqstart 32msec x 4 times = 128msec charge completion current detection time tifc 64msec x 4 times = 256msec charge completion voltage detection time *) tvfc 32msec x 4 times = 128msec recharge start voltage detection time trechg 64msec x 4 times = 256msec battery overvoltage detection time tov 32msec x 4 times = 128msec forced charge time tistart 512msec off time after forced charge toff 128msec battery temperature detection time tpro 32msec x 4 times = 128msec each detection time (rosc=100kohm) *) in the case of battery vo ltage > 2.9v(completed normally) rosc resistor(kohm) oscillation frequency (khz) 1000 7.5 510 14.1 300 23.5 200 33.9 100 64.0 51 109.3 if the oscillation frequency is changed, each timer and detection time will also change. each time is to change by the cha nge rate of oscillation frequency.) the precision of each parameter is +15%(reference va lue) except when using 100kohm resistor for rosc. ic operates at fosc=650khz when rosc terminal is shortcircuited to gnd. reference: oscillation frequency setting (subject to change)
r2a20050ans page 12 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 application circuit adp battery gnd richg bat tmrcnt - + - + vcc cc control cv control richg vsense vref reference voltage bias circuit vref - + vcc vsense uvlo charge start voltage logicvdd - + completion current detection vref richg - + vsense osc vcc th vsense vsense led vdd gate control circuit thermal shutdown adaptor detection adp vref vref vsense rosc vref logicvdd vdd vdd por vref logicvdd + - th vdd over voltage detection completion voltage detection trickle/quick charge switch detection recharge detection high temperature detection low temperature detection charge logic charge control timer led control *) path-transistor includes the function that prevents negative current from bat to vcc.
r2a20050ans page 13 of 14 rev.1.0 may 7 ,2013 r03ds0071ej0100 package
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