35 W wide input range flyback converter using HVLED001 quasi resonant flyback controller. Description

Transcription

1 5 W wide input range flyback converter using HVLED00 quasi resonant flyback controller Data brief Features Input voltage: Vin = 90-6 Vrms, f = 5-66 Hz Output voltage: 8 V / 70 ma High power factor, low THD No-load: better than 00 0 Vin Full load efficiency: better than 90% Short circuit protection with auto restart Safety: Acc. to EN60065 PCB board: 0 mm x 50 mm single side PCB RoHS compliant Description The is designed to provide a stable and insulated 8 V voltage bus to supply secondary side circuitry (e.g., LED current generators) with a total output power of 5 W when a wide range of input voltages is applied at its input. An auxiliary V output is also present to supply small circuitries which absorb a maximum current of 0 ma. A very high power factor is obtained thanks to the HVLED00's features, including management of protections for input voltage variations, excessive input voltages (overvoltage due to surges or bursts) and very low input voltages, thus improving the reliability of the application. The efficiency of the application is very high even at very low loads thanks to the improved frequency fold-back feature that simultaneously reduces the output voltage ripple at light loads. Output short circuit and overload protections feature auto-restart for safer operation in lighting environments. The board can operate with 05 Vrms input voltage replacing Q with STF5N95K5 Power MOSFET. July 05 DocID07080 Rev /5 For further information contact your local STMicroelectronics sales office

2 board board Figure : Jumpers and connectors location GSPG0 0SG /5 DocID07080 Rev

3 J T L N Mains Connector C0 00n D KBP08M C9 n B87T-5A (7mH-0.5A) 6 C 00n RV S0 K00 F A C8 n C6 C7 R 56k TOFF CTRL 5 U R9 R k TOFF CTRL HVLED00 R 0R0 HVSU C 00n GD CS ZCD FB C6.n VRECT 9 GD 7 CS 6 ZCD C 0u R8 70 R D6 LL8 C5 u R5 7k R6 7k D8 BZV55C8 R 7.k C 8p D P6KE-50 C 70p R5 C8 D9 N8W D7 N8W R8 0 R9 R0 0R8 D5 STTH08 Q R 0R8 R7 0R0 STF8N80K5 TBis TSLEV50 C 00p kv TP C7 n Y - kv TP VFB D STPS000CT D STPSH00A TP VCS HS Custom C/W TP VTOFF C 680u TP5 VCTRL TP6 C 680u VZCD TP7 Vrect C 7u C 0u TP8 VGD C5 R 0k TP9 GND_PRI V_OUT R k V_SAux Vout = 8V - 70m A Vaux = V - 0mA Pout = 5W Vin = 98-65) TP0 GND_SEC TP V_SAux TP V_OUT J PowerOut Schematic diagram Figure : circuit schematic Schematic diagram - + FB 0 NC GND 8 HVSU Change Q with STF5N95K5 when input voltage is up to 05 Vrms. FB CS TOFF CTRL ZCD VRECT GD V_SAux V_OUT Vac = TestPoints are just copper pads on bottom side GSPG000SG DocID07080 Rev /5

4 Revision history Revision history Table : Document revision history Date Rev Changes 8-Nov-0 First release. 0-Jul-05 Updated features and description on the cover page. /5 DocID07080 Rev

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