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AN4217 датащи(PDF) 5 Page - STMicroelectronics |
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AN4217 датащи(HTML) 5 Page - STMicroelectronics |
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5 / 22 page ![]() AN4217 STEVAL-ISV0x8V1 parallel and series connection Doc ID 024010 Rev 1 5/22 The output partitioning (R3/R4, R9/R10, R16/R17 in the STEVAL-ISV0x8V1 schematic) of each of the three SPV1020 devices must be in accordance with the desired VOUT. According to the topology: Equation 4 According to the light irradiation on each panel (PIN) and to the system efficiency (η), output power is: Equation 5 Therefore: Equation 6 Each SPV1020 contributes to the output power providing IOUTX according to the irradiation of its panel. Moreover, the desired VOUT is guaranteed if at least one of the three PV panels provides enough voltage to turn on the related SPV1020. Figure 8 shows the power conversion efficiency when VMPP = 12 V and IMPP ranges from 1 A to 8 A (in steps of 1 A). Power ranges between 36 W and 288 W. 3 2 1 Vout Vout Vout Vout = = = 3 2 1 Iout Iout Iout Iout + + = 3 2 1 Pout Pout Pout Pout + + = Ioutx Vout x Poutx * = ] 3 .. 1 [ = x Iinx Vinx Pinx * = ] 3 .. 1 [ = x 3 2 1 ) 3 2 1 ( Pin Pin Pin Iout Iout Iout Vout Pout η η η + + = + + = |
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