AN4217 datasheet(5/22 Pages) STMICROELECTRONICS

tên linh kiện	AN4217

Giải thích chi tiết về linh kiện	Designing the SPV1020 with serial and parallel output configurations

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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.

Vout

Iout

Pout

Ioutx

Vout x

Poutx

]

[ =

Iinx

Vinx

Pinx

]

[ =

)

(

Iout

Vout

Pout

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