DocID18265 Rev 8

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SPV1040 description

3

SPV1040 description

The following is a quick overview of SPV1040 functions, features, and operating modes.

Figure 5. Typical application schematic using the SPV1040

The SPV1040 acts as an impedance adapter between the input source and output load

which is:

Figure 6. SPV1040 equivalent circuit

Through the MPPT algorithm, it sets up the DC working point properly by guaranteeing

Z

IN

= Z

m

(assuming Z

m

is the impedance of the supply source). In this way, the power

extracted from the supply source (P

IN

= V

IN

* I

IN

) is maximum (P

M

= V

M

* I

M

).

The voltage-current curve shows all the available working points of the PV panel at a given

solar irradiation. The voltage-power curve is derived from the voltage-current curve by

plotting the product V*I for each voltage generated.

AM06700v1

Lx

R

S

L

V

BATT

XSHUT

GND

MPP SET

V

PV

R

1

R

3

C

OUT

R

F1

R

F2

C

F

MPP- SET

R

2

C

INsns

C

OUTsns

C

IN

D

OUT

I

CTRL_MINUS

I

CTRL_PLUS

V

CTRL

V

OUT