data brief for further information contact your local stmicroelectronics sales office. december 2007 rev 1 1/4 4 STEVAL-ISA023V2 flyback ac-dc converter evaluation board based on the viper53-e with 24 w negative output features input voltage, vin: from 90 to 265 v rms negative output voltage: -5 v,-12 v standby consumption: <1 w total output power: 24 w emi requirements: en55022 class b safety: en 60950 description this is an ideal solution for a 25 w switch mode power supply (smps) dedicated to industrial or white-goods applications. the board accepts a wide range of input voltages (90 to 265 vrms) and delivers 2 negative output voltages. the switch- mode power supply(smps) is based on the viper53-e. the vipe r53-e combines an enhanced current-mode pwm controller with a high-voltage mdmesh? power mosfet in the same package. the main characteristics of the evaluation board are its high efficiency and low standby consumption. these, combined with the minimal component count and global low cost approach, makes it an ideal solution for powering industrial or consumer equipment, while also meeting worldwide consumption requirements. STEVAL-ISA023V2 www.st.com
board schematic STEVAL-ISA023V2 2/4 1 board schematic figure 1. scheme 0 + + + + + + + + + + positive version only negative version only c17 470n c17 470n r1 1m r1 1m d6 stps1045d d6 stps1045d 1 2 3 4 con2 con2 c10 1000uf/25v c10 1000uf/25v r3 5.6k r3 5.6k c16 2.2nf/y1 c16 2.2nf/y1 c12 100nf c12 100nf c9 470uf/25v c9 470uf/25v d7 stps1045d d7 stps1045d 2 2 1 1 con1 input 85 - 265vac con1 input 85 - 265vac vin vout gnd u4 l78l33 u4 l78l33 r11 15k r11 15k c13 470uf/25v c13 470uf/25v d9 9.1v d9 9.1v comp 1 osc 2 s 3 s 4 d 5 nc 6 vdd 7 tovl 8 u1 viper 53dip u1 viper 53dip u3 tl431 u3 tl431 1 2 4 3 u2 pc817 u2 pc817 c5 39nf c5 39nf r14 1k r14 1k r9 0r r9 0r 1 3 4 5 6 10 7 9 8 t1 t1 c8 120pf c8 120pf q1 bc807-40 q1 bc807-40 d2 stps1150 d2 stps1150 d5 1.5ke150a d5 1.5ke150a r10 10k r10 10k c18 100n c18 100n r13 120r r13 120r r6 220r r6 220r c7 22uf/35v c7 22uf/35v c14 33uf/35v c14 33uf/35v r5 7.5k r5 7.5k c15 100nf c15 100nf r8 0r r8 0r c3 68uf/400v c3 68uf/400v d4 stth1r06 d4 stth1r06 c6 150nf c6 150nf r7 220r r7 220r r12 15k r12 15k r2 1m r2 1m l1 20mh/1a l1 20mh/1a r4 5.1k r4 5.1k -+ d1 -+ d1 c1 100nf/275vac/x2 c1 100nf/275vac/x2 d3 bar18 d3 bar18 d8 stps2h100 d8 stps2h100 t rt1 15r t rt1 15r l2 3.3uh l2 3.3uh l3 0.1uh l3 0.1uh c4 4.7nf/50v c4 4.7nf/50v c2 100nf/275vac/x2 c2 100nf/275vac/x2 c11 1000uf/25v c11 1000uf/25v f1 2a f1 2a
STEVAL-ISA023V2 revision history 3/4 2 revision history table 1. document revision history date revision changes 03-dec-2007 1 initial release.
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