data brief for further information contact your local stmicroelectronics sales office. november 2010 doc id 18241 rev 1 1/4 4 STEVAL-IPB001V1 2 w, 3-phase smps for breaker applications based on the stc04ie170hp esbt features active startup network for improved efficiency input voltage: 150 to 1250 vdc output voltage: 24 v / 83 ma output power: 2 w switching frequency: 30 khz dedicated transformer construction efficiency: > 80% rohs compliant description the design implemented in the steval- ipb001v1 demonstration board represents a complete solution for a 2 w single-output smps (switched-mode power supply), which is widely used to supply power in breaker applications. the smps employs the uc3845b pwm driver, and uses the stc04ie170hp esbt as the main switch. this design can also be applied to power supplies for 3-phase power metering applications, as it can be easily upgraded for higher output power. STEVAL-IPB001V1 www.st.com
schematic diagram STEVAL-IPB001V1 2/4 doc id 18241 rev 1 1 schematic diagram figure 1. STEVAL-IPB001V1 circuit schematic r6 10k r1 1m 1/8w r4 1m 1/8w r2 10k 1/4w r13 680k r20 100k r7 1m 1/8w r18 2.2k r19 1k r15 3.3k r23 6.8 r3 1 r12 1m 1/8w c6 33uf 450v r17 22 r21 3.9k r14 18k r16 150k r9 1m 1/8w r11 1m 1/8w c7 10nf c9 820pf c10 12nf c1 220uf 35v c4 47uf 25v c3 330uf 25v c2 33uf450v t1 4 5 7 8 2 1 c8 100p q2 pn2222a 2 3 1 d3 1n4148 d2 stth110 d1 stth110 j2 con2 1 2 q3 stp03d200 1 2 3 u1 uc3845b vfb 2 comp 1 vref 8 rt/ct 4 sense 3 out 6 vcc 7 gnd 5 c11 100nf c5 33uf 450v r22 10k d5 20v q4 stc04ie170hp 4 1 3 2 j1 con3 1 2 3 d4 stth110 r26 10 r5 10k 1/4w r8 10k 1/4w r10 10k 1/4w r24 10k 1/4w r25 10k 1/4w ! - v
STEVAL-IPB001V1 revision history doc id 18241 rev 1 3/4 2 revision history table 1. document revision history date revision changes 18-nov-2010 1 initial release.
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