VIPer53DIP / VIPer53SP

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PIN FUNCTION

CURRENT AND VOLTAGE CONVENTIONS

CONNECTION DIAGRAM

ORDER CODES

Name

Function

Power supply of the control circuits. Also provides the charging current of the external capacitor during

start-up. The functions of this pin are managed by four threshold voltages:

SOURCE

Power Mosfet source and circuit ground reference.

DRAIN

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

COMP

Input of the current mode structure, and output of the internal error amplifier. Allows the setting of the

dynamic characteristic of the converter through an external passive network. Useful voltage range

extends from 0.5 V to 4.5 V. The Power Mosfet is always off below 0.5 V, and the overload protection is

triggered if the voltage exceeds 4.35V. This action is delayed by the timing capacitor connected to the

TOVL pin.

TOVL

Allows the connection of an external capacitor for delaying the overload protection, which is triggered by

a voltage on the COMP pin higher than 4.35V.

OSC

Allows the setting of the switching frequency through an external Rt-Ct network.

PACKAGE

TUBE

TAPE and REEL

DIP-8

VIPer53DIP

-

PowerSO-10™

VIPer53SP

VIPer53SP13TR

15V

VDD

OSC

DRAIN

SOURCE

COMP

TOVL

I

DD

V

DD

I

OSC

V

OSC

I

TOVL

V

TOVL

I

COMP

V

COMP

I

D

V

DS

1

2

3

4

5

10

9

8

7

6

VDD

TOVL

NC

NC

NC

OSC

COMP

NC

NC

SOURCE

DRAIN

SOURCE

TOVL

COMP

VDD

NC

DRAIN

SOURCE

1

5

4

8

7

6

2

3

OSC

DIP-8

PowerSO-10™