STEVAL-ISA054V1 STMicroelectronics

STEVAL-ISA054V1 100 W 3-phase auxiliary power supply demonstration board based on the STW9N150 Features Input voltage connector 1: 400 Vac RMS 20% Input voltage connector 2: 180 - 265 Vac RMS Input frequency: 50 Hz Output 1: 24 V 4 A Output 2: 5V 1 A or 3.3 V 1 A Output power: 100 W Safety: EN60950 STEVAL-ISA054V1 EMI: EN55014 RoHS compliant Description This demonstration board introduces a solution for industrial power supplies. It takes advantage of the high voltage Power MOSFET, i.e. 1500 V breakdown voltage, to optimize the operation of the flyback converter based on the primary controller UC3844B. The demonstration board has been designed and developed in order to address medium power applications. The board features two outputs, 24 V, 5V or 3.3 V, and is able to deliver more than 100 W in total. The 5 V/3.3 V output is obtained by means of an integrated DC-DC converter based on L5970D, connected to the 24 V output, and adjustable by means of an external voltage divider. May 2009 Doc ID 15545 Rev 2 1/5 www.st.com 5 Circuit schematic STEVAL-ISA054V1 1 Circuit schematic Figure 1. Schematic AM01983v1 2/5 Doc ID 15545 Rev 2 C15 2.2nF-Y1 T5 24V 5 D8 STPS20120CFP L6 I > 4A NTC - 10 12 10uH R2 CON3 1M 1/8W 2 Co1 + Co2 + Co3 + Co4 + C16 + D6 D9 C2 R3 10 D2 2 + 6 10 560uF 35V 560uF 35V 560uF 35V 560uF 35V 560uF 35V 1 1N4007 1N4007 F1 L2 68uF450V 1N4148 J2 CON1 1 2 28mH 7 TRANSFORMER R4 2 1mH L5 1M 1/8W FUSE 1 1 2 C12 L1 C13 J3 R13 1mH CON2 47nF-X2 47nF-X2 47K 3W 2 C5 1 + R7 R1 R17 J4 D10 D11 1M 1/8W C4 68uF 450V 330K 2W 330K 2W R10 R5 R20 1N4007 1N4007 2.2n 1600V 4.7K 91K 1% 24K 1% R9 D3 1M 1/8W STTH108 U4 R8 D5 1K L3 STTH108 1 2 PC817 C6 R29 R11 1mH 12 + C3 56K 330uF 25V 100nF Q6 3 2SD882 C14 10nF R27 27 U3 Q5 TL1431 R28 12 1 STW9N150 3 3 Q7 U1 R26 2SB772 100 2 VFB 1 6 R6 COMP OUT R18 15K R19 1K 2.2K 1% 8 3 VREF SENSE 4 RT/CT C9 R23 1nF C10 UC3844B 0.6 1nF 1 2 1 2 1 2 1 2 1 2 4 3 t 5 7 GND VCC 2 1 1 2 3 2 2 1