data brief for further information contact your local stmicroelectronics sales office. november 2008 rev 1 1/6 6 STEVAL-ISV001V1 1000 w dual stage dc-ac converter demonstration board based on the stp160n75f3 features nominal input voltage: 24 v output voltage: 230 vrms, 50 hz output power: 1 kw efficiency: 90% switching frequency: 100 khz (dc-dc); 16 khz (dc-ac) description the STEVAL-ISV001V1 demonstration board implements a 1 kw dual stage dc-ac converter, suitable for use in battery powered uninterruptible power supplies (ups) or photovoltaic (pv) stand alone systems. the converter is powered from a low dc input voltage varying from 20 v to 28 v and is capable of supplying up to 1 kw output power on a single phase ac load. these features are met with a dual stage conversion topology including an efficient step-up push-pull dc-dc converter, to produce a regulated high voltage dc bus, and a sinusoidal h-bridge pwm inverter to generate a 50 hz, 230 vrms output sine wave. other relevant features of the proposed system are high power density, high switching frequency, galvanic isolation and efficiency greater than 90% over a wide output load range. STEVAL-ISV001V1 www.st.com
circuit schematics STEVAL-ISV001V1 2/6 1 circuit schematics figure 1. converter schematic: the power stage c1 c2 vin gnd m5 m1 r1 r2 0 gate a gate b r92 r91 r90 r87 c5 r88 m6 m4 c55 r89 m2 d14 m3 d15 c38 c3 c7 c8 r96 tx d1 r97 s h1 g l1 g l 2 d2 d3 c34 c35 c36 l4 1.5m r94 c53 d13 r95 g h 1 g h2 v a c 1 v ac 2 t2 t3 t1 t2 t3 d4 igbt1 igbt2 igbt3 igbt4 t1 am00632v1
STEVAL-ISV001V1 circuit schematics 3/6 figure 2. schematic of the push-pull control and driving circuit figure 3. inverter control driving circuit schematic c16 c14 r93 +15v pwm b pwm a u1 sg3525 in - 1 osc 4 ct 5 disch 7 ss 8 s.down 10 outa 11 gnd 12 vc 13 outb 14 rt 6 comp 9 sync 3 +vi 15 in+ 2 vref 16 0 +15v vout c17 1n c10 r7 c11 c12 5u r9 +15v c18 r20 pwm a q9 2sd882 q10 bc107b q11 bc178b q12 bc178b gate a +15v c19 r21 pwm b gate b 0 0 am00633v1 pwm low1/high2 pwm low2/high1 d6 r24 d10 d8 r22 s l1 rg 1 rg l1 s h1 c26 c2 +15 ic l6386 sd 2 vcc 4 lin 1 hvg 1 gnd 8 hin 3 cin 6 diag 5 nc 1 sg n 7 lv 9 out 1 nc 1 vboot 1 rg h2 rg l 2 s l2 s h2 c3 g h1 c33 +15 g l2 ic l6386 sd 2 vcc 4 lin 1 hvg 1 gnd 8 hin 3 cin 6 diag 5 nc 1 sgn 7 lv 9 out 1 nc 1 vboot 1 g h2 0 d5 0 r25 d7 r23 d9 pa6 r9 5v c56 c57 reset u1 st7flite39 _ soic _ vs 1 vd 2 rese 3 osc1/clk 20 osc 19 pa0/lti 18 pa1/ati 17 pa2/atpw 16 pa3/atpw 15 pa4/atpw 14 pa5/atpwm3/iccd 13 pa6/mco/iccclk/br 12 pa 11 pb0/ss/ai 4 pb1/sck/ai 5 pb2/miso/ai 6 pb3/mosi/ai 7 pb4/clkin/ai 8 pb5/ain 9 pb6/ain 1 pwm low1/high2 pa5 pwm low2/high1 am00634v1
circuit schematics STEVAL-ISV001V1 4/6 figure 4. schematic of the auxiliary power supply section c59 5v u2 l7805 vin 1 g n d 2 vout 3 +15v + c51 + c52 c5 q8 u1 l5973d ou 1 syn 2 in 3 com 4 f 5 vre 6 gn 7 vc 8 c39 c40 r81 c41 l3 150uh r82 r83 + c42 +15v vin 0 d11 d12 am00635v1
STEVAL-ISV001V1 revision history 5/6 2 revision history table 1. document revision history date revision changes 27-nov-2008 1 initial release.
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