VIPer22ADIP / VIPer22AS

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PIN FUNCTION

CURRENT AND VOLTAGE CONVENTIONS

CONNECTION DIAGRAM

Name

Function

Power supply of the control circuits. Also provides a charging current during start up thanks to a high

voltage current source connected to the drain. For this purpose, an hysteresis comparator monitors the

current source.

source.

SOURCE

Power MOSFET source and circuit ground reference.

DRAIN

Power MOSFET drain. Also used by the internal high voltage current source during start up phase for

FB

Feedback input. The useful voltage range extends from 0V to 1V, and defines the peak drain MOSFET

current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin

shorted to the SOURCE pin.

FB

VDD

DRAIN

SOURCE

CONTROL

VIPer22A

1

2

3

4

DRAIN

DRAIN

DRAIN

DRAIN

8

7

6

5

DRAIN

DRAIN

DRAIN

DRAIN

1

2

3

4

8

7

6

5

FB

VDD

SOURCE

FB

VDD

SOURCE

SOURCE

SOURCE

SO-8

DIP8