STEVAL-ILL042V1 60 W high power factor flyback LED driver based on the L6562AT and TSM101 Data brief Features ■ Mains voltage range: VACmin = 185 Vac, VACmax = 265 Vac ■ Minimum mains frequency: fL = 47 Hz ■ DC output voltage: Vout = 130 V ■ Maximum output current: Iout = 0.462 A ■ Minimum switching frequency: fSWmin = 57 Hz ■ Reflected voltage: VR = 195 V ■ Leakage inductance spike: Vspike = 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. March 2012 Doc ID 022285 Rev 2 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Vin=185 to 265 Vac 3 2 1 2/4 F1 2 100nF X2 Cap C1A 1 2 3 4 COMP INV GD MULT GND VCC CS ZCD 6 5 C23 150 pF 25V 0 Ohm 1 U3 L6562AT C17 2.2nF R21 R22 82 kOhm R36 680k 1nF 25V C14 R31 100 kOhm R23 R28 100 kOhm R25 1.1Ohm 0.25W D3 R5 68 kOhm 7 6 T1 TRAFO OPTO ISOLATOR-A TMMBAT46 2 3 4 5 2 4 3 ISO1 C26 9 10 12 13 C19 1uF STTH2L06 D5 2.2n-Y 1- 250V Doc ID 022285 Rev 2 3 4 Vref Crref Output VCC Vrin Gnd Crin 5 6 C29 1uF 50V Csense R20 47kOhm U5 TSM101 R38 10KOhm R18 15 kOhm 2 R24 10 Ohm R4 C16 2.2n-Y 1- 250V 1 2.2kOhm C18 47uF, 35V 100 nF, 50V C15 D1 STTH1L06 D6 1.5KE350A Q1 STP7N95K3 R44 1.1Ohm 0.25W R35 10 Ohm D4 TMMBAT46 C20 2200nF- 630VDC R34 100 kOhm + 1 2A 1000V 1 30 kOhm BR1 3 R27 8.2 kOhm 4 R26 1 MOhm 3 R29 1 MOhm 4 - C28 1uF 50V C9 C10 C24 C27 1uF 50V R42 2 kOhm R41 10 kOhm D9 18V 0.5W R16 12 kOhm R33 12 kOhm R14 12 kOhm C25 100 nF 25V C13 R17 1.5 kOhm 100 nF R15 100 Ohm 330uF, 160V 330uF, 160V 330uF, 160V TMMBAT46 D7 R37 20 kOhm R19 68 kOhm R32 68 kOhm R39 18 Ohm R43 1.2 Ohm, 1% R40 1.2 Ohm, 1% D8 TMMBAT46 C22 4.7 uF 160V J1 CON2 Vout=130 Vac, Iout=0.462A 1 2 Figure 1. 1n-Y 1- 250V C21 C1B 100nF X2 Cap L3 2x47mH, 1.5A 2 R30 1 MOhm FUSE 1A 1 CON3 J3 Schematic STEVAL-ILL042V1 Schematic Electrical schematic 8 7 8 7 AM10531v1 STEVAL-ILL042V1 2 Revision history 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 Doc ID 022285 Rev 2 3/4 STEVAL-ILL042V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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