STEVAL-ISA034V1 10 W 3-phase auxiliary power supply based on the L6565 and STW3N150 Data Brief Features ■ Input voltage range : 185 Vac to 460 Vac ■ Input frequency range: 50/60 Hz ■ Output 1: 12 V @0.6 A ■ Output 2: 5 V @ 0.55 A ■ Output power : 10 W ■ Safety: EN60950 ■ EMI: EN55014 Description STEVAL-ISA034V1 This evaluation board offers a solution for industrial power supplies fed by 3-phase mains. It takes advantage of the high voltage MOSFET STW3N150 to optimize the operation of the quasiresonant flyback converter based on the primary controller L6565. The STW3N150 is a 1500 V power MOSFET, designed with STMicroelectronics’ proprietary high voltage "MESH OVERLAY™" technology. Thanks to this technology, the switch features very low RDS(on) per area, low gate charge and high switching performance. The evaluation board has been designed and developed to address low power applications. It features two isolated outputs (12 V and 5 V) and is capable of delivering up to 10 W of output power. February 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 CON2 230Vac CON1 400Vac 2 1 2 1 F4 1A L10 L9 L8 1mH 1mH 1mH C A C A D11 1N4007 D12 1N4007 C A C A D10 1N4007 D13 1N4007 10n -X2 C20 4 1 2/4 27 mH L11 3 2 4.7uF 10n -X2 C21 4.7uF 50E NTC2 + + C23 C22 R29 1M R28 1M R26 1M R27 1M R13 27k 2.2n 12k 1n C11 R12 C10 C12 220p 4 3 2 1 R6 1.8M R5 1.8M U1 L6565 120k R14 CS VFF COMP INV 8 5 6 7 D7 1N4148 C13 100n ZCD GND GD VCC C9 47u 15k R15 R8 330k R7 330k 2.2n - Y1 C19 1N4148 D6 C14 100p 150K R10 150K R9 2.2 R16 Q11 10 R11 D5 C15 STTH108 1k R17 3 6.8n - nc R12 2.2k - nc nc STTH108 D4 1n/2kV C8 R18 3.5 STP4N150 M1 PC817 U2 7 6 5 2 3 4 C16 nc D8 STPS3L25S D9 STPS3L40S R20 1k TRANSFORMER Lp =15mH N1/N5V=87 N1/N12V=38 N1/Naux=30 Core material N67 Core shape E20 (E25) 8 T1 1 TL431 U3 Co2 220u - 10V Co1 220u - 25V 1 R19 2.2k L6 10u L7 10u 560 R23 Co3 n.c . C18 330n C17 Co4 22u - 10V 22u - 25V R22 10k R21 10k R25 nc R24 nc 2 3 1 CON2 J6 5V @ 550 12V @ 600 mA mA Figure 1. 1 2 1 3 2 480 - 650VDC Circuit schematic STEVAL-ISA034V1 Circuit schematic Schematic STEVAL-ISA034V1 2 Revision history Revision history Table 1. Document revision history Date Revision 08-Feb-2008 1 Changes Initial release. 3/4 STEVAL-ISA034V1 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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