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data brief for further information contact your local stmicroelectronics sales office. october 2011 doc id 022334 rev 2 1/12 12 STEVAL-ISV003V1 250 w microinverter for plug-in pv panels demonstration board features input voltage range from 18 v to 45 v output voltage range from 110 v to 240 v ac, 50/60 hz grid connection algori thm and mppt capability digital control section managed by the stm32 reactive power management rs-232 for co mmunication rohs compliant description the STEVAL-ISV003V1 is a demonstration board which implements the microinverter concept and is designed to optimize the power production of each single solar pane l by means of dc/ac conversion. the conversion system is capable of both grid synchronization and maximum power point tracking (mppt) thanks to the use of an advanced control algorithm implemented in the 32-bit stm32 microcontroller. the mppt function is based on the perturb and observe (p & o) concept which seeks the best operating point of the panel, thus maximizing the energy produced under any environmental condition. the grid synchronization algorithm has the advantage over standard solutions of a decoupled control of active and reactive power. the steval- isv003v1 demonstration board uses a high- frequency (hf) isolated dc/dc converter with interleaved current and an optimized full-bridge dc/ac inverter. the typical solar panel voltage is first stepped up to about 400 v and then converted into ac to create a sinusoidal output. an led display provides a user-friendly interface for the end user which allows monitoring and/or modifying some of the main operating parameters. two modes of operation are available and can be selected to allow either open-loop operation or closed-loop operation in synchronization with the grid. in open-loop mode the sinusoidal reference is created internally by means of a standard lookup table, while in closed-loop mode, a sinusoidal voltage feedback, proportional to the grid voltage, is used. the system can be connected to either a 50 hz or 60 hz network, depending on local requirements. finally, the rs-232 interface can be used for serial data transfer of specified voltage, current and current signals. STEVAL-ISV003V1 www.st.com
schematics STEVAL-ISV003V1 2/12 doc id 022334 rev 2 1 schematics figure 1. isolated interleaved boost converter d11 stp sc606 c7 2.2uf, 630v l6 inductor se ns le g1 functional isolation d40 stp sc806g j1 con _pv 1 2 t3 tra fo 6 12 1 7 5 4 2 3 9 10 r11 0.02/0.5w c27 1uf, 100v q4 stb 42n65m5 d42 stp sc806g c16 1uf, 100v r6 100k 1% r3 15m 1% vbus_s ens r21 27/0.25w q2 stb 42n65m5 c17 1uf, 100v d9 r1 3.3/0.25w r23 27/0.25w 10 mohm 1w 1% r22 c18 1uf, 100v d14 r19 27/0.25w se ns le g2 d22 r8 2.7/0.25w r12 27/0.25w schottky d24 r18 10k 1% c28 1uf, 100v low frequency high frequency r4 3.3/0.25w d17 r10 150k 1% low f pw m high side 2 c15 1uf, 100v vin_se ns_p v q3 stb 42n65m5 q1 stb 42n65m5 magnetica 800uh 4a vinput d21 r7 2.7/0.25w r9 27/ 0. 25w schottky d23 c19 1uf, 100v d8 stp s3l40s q5 sth180n10f3-2 i_se ns _pv c20 1uf, 100v l4 inductor gate 2 hi gh f p wm low side 1 magnetica 800uh 4a hi gh f p wm high side 1 q7 sth180n10f3-2 low f pw m low s ide 2 d6 stp s3l40s c21 1uf, 100v r20 27/0.25w c12 2.2uf, 250v dr ain m os fe t high 1 drain mosfet high 2 c13 2.2uf, 250v c23 1uf, 100v 6a 600v gate 1 d10 out a c 1 r2 3.3/0.25w out a c 2 c8 22uf, 450v c22 1uf, 100v c9 22uf,450v c10 22uf, 450v c24 1uf, 100v d16 d15 r5 3.3/0.25w c11 22uf, 450v c25 1uf, 100v r14 0.02/0.5w d34 stp sc606 c26 1uf, 100v am10192v1
STEVAL-ISV003V1 schematics doc id 022334 rev 2 3/12 figure 2. power supply section - 15 v figure 3. power supply section - 5 v figure 4. dc/dc drive selection vcc15v panasonic eeefk1j151aq c77 100nf c135 2.7nf panasonic eeefc1e221p r38 20k d31 stps3l60u 1 2 coilcraft mss1278-224 u1 l4971 osc 3 comp 7 out 4 gnd 1 vcc 5 ss/inh 2 vfb 8 boot 6 r39 24k c78 10nf c80 120pf r40 16k, 1% l15 r42 56.2k, 1% c83 220uf, 25v c136 2.7nf vinput c138 220nf c137 150uf,63v c139 100nf am1019 3 v1 panasonic eeefk1j151aq c140 100nf panasonic eeefc1e221p c141 2.7nf r71 20k d32 stps3l60u 1 2 mss1278-224 coilcraft u2 l4971 osc 3 comp 7 out 4 gnd 1 vcc 5 ss/inh 2 vfb 8 boot 6 r75 24k c142 10nf r77 4.7k, 1% c143 120pf l17 r78 2.7k, 1% c144 220uf, 25v vinput c146 220nf c145 2.7nf c148 100nf c147 150uf,63v vcc5v a m 1 0 1 9 3 v 1 vcc15v gate 1 pwm2 pwm1 gate 2 r46 3.3 ohm r44 3.3 ohm c60 10u 25v low side mosfet driver enb2 8 enb1 1 pwm1 2 gnd 3 pwm2 4 out1 7 vcc 6 out2 5 ic3 pm8834 a m 1 0 1 9 4 v 1
schematics STEVAL-ISV003V1 4/12 doc id 022334 rev 2 figure 5. v-bus sensing adc_bus_voltage r128 86.6k 1% vbus_sens 3 2 1 4 8 + - u13a3 ts272 q10 2stn2340 c74 150p 25v led k 1 led a 2 pd1 k 3 pd1 a 4 pd2 k 6 pd2 a 5 nc 8 nc 7 u21 hcnr200-300 r131 59k 1% c69 100n 50v 5visol r129 1k 1% 3 2 1 4 8 + - u13a2 ts272 3v3 r130 120 c76 100n 50v c71 100n 50v am10196v1
STEVAL-ISV003V1 schematics doc id 022334 rev 2 5/12 figure 6. 5 v isolated figure 7. pv voltage sensing section 5visol c53 1u 25v vcc 15v 1 5 v 7 gnd 2 0 5 dcdc l5 nmv1505sac c55 100n 15v c56 100n 25v vcc15v am10197v1 r102 10k 0.1% adc_panel_voltage vin_sens_pv r103 3.3k 1% c85 10n out1 1 in1+ 3 vcc+ 8 in1- 2 out2 7 vcc- 4 in2+ 5 in2- 6 ic11 tsv992 c84 100n r100 1k 5vcc r101 10k 0.1% am1019 8 v1
schematics STEVAL-ISV003V1 6/12 doc id 022334 rev 2 figure 8. dc/ac topology: mixed-frequency inverter d11 stp sc606 se ns le g1 r11 0.02/0.5w q4 stb 42n65m5 r6 100k 1% r3 15m 1% vbus_s ens r21 27/0.25w q2 stb 42n65m5 d9 r1 3.3/0.25w r23 27/0.25w d14 r19 27/0.25w se ns le g2 low frequency high frequency r4 3.3/0.25w d17 low f pw m high side 2 q3 stb 42n65m5 q1 stb 42n65m5 d8 stp s3l40s hi gh f p wm low side 1 hi gh f p wm high side 1 low f pw m low s ide 2 d6 stp s3l40s r20 27/0.25w dr ain m os fe t high 1 dr ain m os fe t high 2 6a 600v d10 out a c 1 r2 3.3/0.25w out a c 2 c8 22uf, 450v c9 22uf,450v c10 22uf, 450v d16 d15 r5 3.3/0.25w c11 22uf, 450v r14 0.02/0.5w d34 stp sc606 am10199v1
STEVAL-ISV003V1 schematics doc id 022334 rev 2 7/12 figure 9. output ac line filter r26 n.c. c34 2.2n, 300vac out ac 2 d29 stps2l25u c31 470nf, 275vac f1 fuse 2a sc1 tmov14r 140e 1 2 2w sc3 tmov14r 140e 1 2 earth ground neutral_sens l1_sens r28 5.6 ac_neut q9 2n7002 rl1 g5le-1a4-dc12 3 2 5 1 i- i+ t1 10mh 1 4 2 3 r29 10k 1% vcc15v sc2 v150la20a 1 2 r25 n.c. c30 2.2n, 300vac j2 con grid 2 1 c29 2.2n, 300vac c33 2.2n, 300vac coilcraf t bu10-6003r0bl r27 470 c36 10uf 25v relay_grid r36 330 l13 magnetica 2196.0001 l14 magnetica 2196.0001 out ac 1 am10200v1
schematics STEVAL-ISV003V1 8/12 doc id 022334 rev 2 figure 10. output current sensor figure 11. ac line current sensing honey well i+ i- vs(+) 1 gnd (-) 2 pri iin 5 pri iout 4 out 3 ic1 cslw6b5 r30 1k 1% c37 22n 5vcc c35 100n iout_sens am10201v1 r94 560 r96 1.1k out1 1 in1+ 3 vcc+ 8 in1- 2 out2 7 vcc- 4 in2+ 5 in2- 6 ic9 tsv992 ac_line current iout_sens 5vcc r88 10k r90 4k7 0.1% r92 10k 0.1% ac line current sensor c79 100nf am10202v1
STEVAL-ISV003V1 schematics doc id 022334 rev 2 9/12 figure 12. vout sensing section 3 2 1 4 8 + - u13a1 ts272 r69 6.81k, 1% r74 1k, 1% c72 100nf, 16v ac_line v oltage c67 100nf, 16v 19.4v r86 20k,1% 5vcc r84 20k,1% c75 10nf, 16v 5vcc l1_sens neutral_sens 1 7 4 6 t2 pulse 020-5384.0 r79 10k,1% c70 1nf, 50v r72 10k, 1% r73 180k, 1% r76 6.81k, 1% c68 10uf, 25v am1020 3 v1
schematics STEVAL-ISV003V1 10/12 doc id 022334 rev 2 figure 13. 32 bit mcu-stm32f electrical schematic pa2 tim5_ch3 pf0 pe7 d4 ti m1_c h 1n oscin oscout pb7 usart1_rx ac_line current d14 pd9 pc15 osc32_out pd8 d13 pg12 fsmc_ne4 pa13 jtag pa14 jtag pa15 jtag d10 d11 d9 d7 d8 d15 pd10 d12 pg7 key -center d2 pd0 d3 pd1 d5 pa1 relay -grid d6 pc12 pa7 spi1_mosi pa0 tim2_ch1 pg14 key -left pd3 key -down d0 pd14 pe1 d1 pd15 pg13 key -right pb6 usart1_tx pc0 adc123_in10 pg15 key -up pc1 adc123_in11 pc2 adc123_in12 pb12 enable (dac) pc6 tim8_ch1 pc3 adc123_in13 pd5 fsmc-nwe pc4 adc12_in14 tim1_ch1_leg2 pb11 sy nc (dac) pd4 fsmc-noe pc13 pwm2 pb0 tim3_ch3 pg8 user-button boot1 pb2 pb10 ldac (dac) pa3 tim5_ch4 pc5 pa10 pa10 pe3 pe2 r107 10k c104 180p c101 180p c103 180p r118 10k c98 10nf - c117 180p - 1 2 3 j14 jumper_3 reset# c118 10nf c114 180p c94 180p pc5 adc12_in15 c109 100nf l16 blm41pg600sn1l c122 100nf pc8 pc8 tim8 ch3 c102 180p c113 180p c92 22pf c112 100nf r104 10k c110 100nf 1 2 y2 8mhz c116 180p c123 100nf gnd pc6 c119 10uf c105 180p c107 100nf c111 100nf c124 100nf 1 2 3 j13 con3 r115 390 osc_in 23 osc_out 24 nrst 25 pc0 26 pc1 27 pc2 28 pc3 29 pa0-wkup 34 pa1 35 pa2 36 pb12 73 pb13 74 pb14 75 pb15 76 pd8 77 pd9 78 pd10 79 pd11 80 pd12 81 pd13 82 pd14 85 pd15 86 pc6 96 pc7 97 pc8 98 pc9 99 pa8 100 pa9 101 pa10 102 pa11 103 pa12 104 not connected 106 pc10 111 pc4 44 pc5 45 pd0 114 pd1 115 pd2 116 pd4 118 pd5 119 pd6 122 pd7 123 boot0 138 pa3 37 vss_1 71 pa4 40 pa5 41 pa6 42 pa7 43 pb0 46 pb1 47 pb2 48 vdd_1 131 pa13 105 pa14 109 pa15 110 pb8 139 pb9 140 pb10 69 pb11 70 pb7 137 pb6 136 pb5 135 pb3 133 pb4 134 pc11 112 pc12 113 pc13-anti_tamp 7 pc14-osc32_in 8 pc15-osc32_out 9 pe14 67 pe13 66 pe12 65 pe11 64 pe10 63 pe9 60 pe8 59 pe7 58 pe6 5 pe5 4 pe4 3 pe3 2 pe2 1 pe1 142 pe0 141 pe15 68 pf15 55 pf14 54 pf13 53 pf12 50 pf11 49 pf10 22 pf9 21 pf8 20 pf7 19 pf6 18 pf5 15 pf4 14 pf3 13 pf2 12 pf1 11 pf0 10 pg15 132 pg14 129 pg13 128 pg12 127 pg11 126 pg10 125 pg9 124 pg8 93 pg7 92 pg6 91 pg5 90 pg4 89 pg3 88 pg2 87 pg1 57 pg0 56 pd3 117 vss_2 107 vss_3 143 vss_4 38 vss_5 16 vss_6 51 vss_7 61 vss_8 83 vss_9 94 vss_10 120 vss_11 130 vdd_2 121 vdd_3 95 vdd_4 84 vdd_5 62 vdd_6 52 vdd_7 17 vdd_8 39 vdd_9 144 vdd_10 108 vdd_11 72 vdd_a 33 vss_a 30 vref- 31 vref+ 32 vbat 6 u20 stm32f103zet6 c90 10pf c121 100nf 1 2 3 j12 jumper_3 pb1 r106 0 1 2 y1 32.768khz 472-0887 105 0 c120 100nf r121 47 c115 180p c91 10pf c106 180p c108 100nf c93 22pf a0_dac data in (dac) a1_dac adc_bus_voltage sclk (dac) adc_panel_current adc_panel_voltage fsmc_ne4 key -down key -left key -right tms/swdio key -center key -up tdo/swo tc k/ sw c lk tr st td i d[0..15] tx_0 relay_grid fsmc_noe enable (dac) fsmc_nwe sy nc (dac) reset user_button rx_0 ldac (dac) a0 pwm1 pa2 3v3 pb13 pb5 pc9 pe0 pc13 pc12 pe3 pe1 pg0 pe2 gnd gnd gnd gnd gnd gnd 3v3 gnd gnd gnd gnd 3v3 gnd gnd gnd gnd 3v3 gnd 3v3 gnd gnd gnd 3v3 gnd gnd gnd gnd pwm4 3v3 3v3 gnd 3v3 gnd vdda gnd 3v3 3v3 gnd pwm3 pc7 ti m4_c h 3_leg1 pc7 tim8_ch2 pc9 tim8 ch4 pa3 pg0 pe0 pb5 ac_line v oltage pb1 tim8_ch3n pc14 osc32_in am10204v1
STEVAL-ISV003V1 revision history doc id 022334 rev 2 11/12 2 revision history table 1. document revision history date revision changes 07-oct-2011 1 initial release. 11-oct-2011 2 minor text changes on cover page.
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