DocID18265 Rev 8

9/25

AN3319

SPV1040 description

The duty cycle set by the MPPT algorithm can be overwritten if one of the following is

triggered:

•

Overcurrent protection (OVC), peak current on low side switch

≥ 1.8 A

•

Overtemperature protection (OVT), internal temperature

≥ 155 °C

•

Output voltage regulation, V

CTRL

pin triggers 1.25 V

•

Output current regulation R

s

* (I

CTRL_PLUS

- I

CTRL_MINUS

)

≥ 50 mV

•

MPP-SET voltage V

MPP-SET

≤ 300 mV at the start-up and V

MPP-SET

≤ 450 mV in

working mode.

Application components must be carefully selected to avoid any undesired trigger of the

above thresholds.

In order to improve the overall system efficiency, and to reduce the BOM, the SPV1040 also

integrates a zero crossing block whose role is to turn-off the synchronous rectifier to prevent

reverse current flowing from output to input.