for further information contact your local stmicroelectronics sales office. march 2012 doc id 022285 rev 2 1/4 4 STEVAL-ILL042V1 60 w high power factor flyback led driver based on the l6562at and tsm101 data brief features mains voltage range: v acmin = 185 v ac , v acmax = 265 v ac minimum mains frequency: f l = 47 hz dc output voltage: v out = 130 v maximum output current: i out = 0.462 a minimum switching frequency: f swmin = 57 hz reflected voltage: v r = 195 v leakage inductance spike: v spike = 100 v expected efficiency: 92 % rohs compliant description the STEVAL-ILL042V1 demonstration board is a led power supply in high pf flyback configuration able to drive a 60 w led array. the board is based on the l6562at and the tsm101 controller. this configuration uses an isolated feedback with an optocoupler and a secondary side reference/error amplifier, the tsm101, for voltage and current regulation. the tsm101 includes two op-amps. one op-amp is used for constant voltage control and the other one for constant current control. the l6562at is a pfc controller operating in transition mode. the highly linear multiplier includes a special circuit which is able to reduce ac input current distortion, allowing wide-range mains operation with an extremely low thd, even over a large load range. efficiency is high at heavy load, more than 90% is achievable. this system, designed using the l6562at and the tsm101 controller, offers several advantages in terms of output current and voltage stability. www.st.com
schematic STEVAL-ILL042V1 2/4 doc id 022285 rev 2 1 schematic figure 1. electrical schematic am105 3 1v1 c20 2200nf- 630vdc c16 2.2n-y 1- 250v c26 2.2n-y 1- 250v j3 con3 1 2 3 -+ br1 2a 1000v 2 1 3 4 t1 trafo 5 13 d5 f1 fuse 1a l3 2x47mh, 1.5a 1 2 4 3 c1a 100nf x2 cap c1b 100nf x2 cap vin=1 8 5 to 265 v a c r35 10 ohm d4 tmmbat46 c24 330uf, 160v r32 68 kohm r33 12 kohm c18 100 nf, 50v c15 47uf, 35v r29 1mohm c10 330uf, 160v r30 1 mohm c13 100 nf c21 1n-y 1- 250v 5 7 6 2 13 12 10 9 4 3 d1 stth1l06 d3 tmmbat46 d5 stth2l06 c9 330uf, 160v j1 con2 1 2 r14 12 kohm r4 10 ohm q1 stp7n95k3 vo u t=1 3 0 v a c, io u t=0.462a d6 1.5ke350a c17 2.2nf r34 100 kohm r31 100 kohm 10 ohm r36 r25 1.1ohm 0.25w c22 4.7 uf 160v d9 18v 0.5w r15 100 ohm r16 12 kohm r37 20 kohm c14 1nf 25v r21 0 ohm r22 82 kohm r18 15 kohm r26 1 mohm r27 8.2 kohm r5 68 kohm 1mohm r44 1.1ohm 0.25w u3 l6562at inv 1 comp 2 mult 3 cs 4 r19 68 kohm r23 30 kohm 680k c23 150 pf 25v r28 100 kohm r41 10 kohm c19 1uf r38 10kohm c28 1uf 50v iso1 opto isolator-a 1 2 4 3 l6562at zcd 5 gnd 6 gd 7 vcc 8 r24 2.2kohm u5 tsm101 vref 1 csense 2 crref 3 gnd 4 crin 5 output 6 vrin 7 vcc 8 c25 100 nf 25v r42 2 kohm c27 1uf 50v d7 tmmbat46 d8 tmmbat46 r20 47kohm r39 18 ohm c29 1uf 50v r17 1.5 kohm r43 1.2 ohm, 1% r40 1.2 ohm, 1%
STEVAL-ILL042V1 revision history doc id 022285 rev 2 3/4 2 revision history table 1. document revision history date revision changes 28-sep-2011 1 initial release. 20-mar-2012 2 modified: title of the document
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