STEVAL-ISA054V1

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 ■ EMI: EN55014 ■ RoHS compliant STEVAL-ISA054V1 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 J3 J4 2 1 CON2 2 1 CON1 F1 FUSE 1 1 1 1mH L3 1mH 1mH L5 L2 2 2 2 2 1 2 1 1N4007 D10 1N4007 D6 1N4007 D11 47nF-X2 C12 1N4007 D9 28mH 2 1 2 1 2 1 3 4 L1 t 47nF-X2 C13 NTC - 10 C10 1nF R18 15K + OUT RT/CT VREF SENSE VFB COMP UC3844B 4 8 2 1 U1 C3 R9 1M 1/8W R7 1M 1/8W 47K 3W R13 R4 1M 1/8W R2 1M 1/8W 330uF 25V 68uF 450V C5 + 68uF450V C2 + 7 VCC GND 5 3 6 R1 10 R26 100 3 3 330K 2W R3 2 1 1 Doc ID 15545 Rev 2 D2 R19 1K Q7 2SB772 R28 12 Q6 2SD882 R27 27 R29 12 330K 2W R17 1N4148 C9 1nF 2 2/5 1 2 3 C4 R23 0.6 Q5 STW9N150 STTH108 D5 STTH108 D3 2.2n 1600V 7 6 2 5 T5 C15 C14 10nF PC817 U4 TRANSFORMER 10 12 D8 Co2 + Co3 + Co4 + R8 1K R11 56K 3 U3 TL1431 R10 4.7K 100nF C6 R6 2.2K 1% R5 91K 1% 560uF 35V 560uF 35V 560uF 35V 560uF 35V Co1 + ST PS20120CFP C16 560uF 35V 10uH I > 4A R20 24K 1% L6 + 24V J2 CON3 2 1 Figure 1. 1 1 2 2.2nF-Y 1 Circuit schematic STEVAL-ISA054V1 Circuit schematic Schematic AM01983v1 STEVAL-ISA054V1 Circuit schematic Figure 2. DC-DC converter +3.3V / +5V 8 7 6 5 24V Cin 10uF 25V Ceramic U2 VCC GND VREF FB OUT SY NC INH COMP L4 1 2 3 4 33uH >1A CON4 L5970D C8 220p R12 4.7K D7 STPS2L25U R16 R14 5.6K 1% 10K 1% 2 1 J5 + Cout SW1 470uF 10V C7 22nF R15 3.3K 1% AM01986v1 Doc ID 15545 Rev 2 3/5 Revision history 2 STEVAL-ISA054V1 Revision history Table 1. 4/5 Document revision history Date Revision Changes 01-Apr-2009 1 Initial release 11-May-2009 2 Updated features in cover page Doc ID 15545 Rev 2 STEVAL-ISA054V1 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. 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