VIP22A 参数 Datasheet PDF下载

VIPer22ADIP / VIPer22AS

PIN FUNCTION

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

V

DD

voltage and provides two thresholds:

- V

DDon

: Voltage value (typically 14.5V) at which the device starts switching and turns off the start up

current source.

- V

DDoff

: Voltage value (typically 8V) at which the device stops switching and turns on the start up current

source.

Power MOSFET source and circuit ground reference.

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

charging the external V

DD

capacitor.

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.

V

DD

SOURCE

DRAIN

FB

CURRENT AND VOLTAGE CONVENTIONS

I

DD

I

D

I

FB

FB

VDD

CONTROL

DRAIN

V

DD

V

FB

VIPer22A

V

D

SOURCE

CONNECTION DIAGRAM

SOURCE

SOURCE

FB

VDD

1

2

3

4

8

7

6

5

DRAIN

DRAIN

DRAIN

DRAIN

SOURCE

SOURCE

FB

VDD

1

2

3

4

8

7

6

5

DRAIN

DRAIN

DRAIN

DRAIN

SO-8

DIP8

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