EST7502B

PC Power Supply PWM with Supervisor

www.esthome.com

1

2007-10-15 V2

GENERAL DESCRIPTION

The EST7502B is a pulse–width modulation (PWM) control circuit with complete protection circuits for

used in the SMPS (Switched Mode Power Supply). It contains various functions, which are Over

Voltage Protection, Under Voltage Protection, Power Good Output (PGO), Remote On/Off control and

etc. It can minimize external components of switching power supply systems in personal computer.

Over Voltage Protection (OVP) monitors 3.3V, 5V, 12V and PT input voltage level. Under Voltage

Protection (UVP) monitors 3.3V, 5V and 12V input voltage level. Power Good Output monitors the

voltage level of power supply.

FEATURES

• Complete PWM Control and Protection Circuitry

• Over Voltage Protection for 3.3V / 5V / 12V / PT

• Under Voltage Protection for 3.3V / 5V / 12V

• 280ms PG Time Delay

• Power Good Output is Open Drain Output

• PWM Control Output are Open Drain Output

• 280 ms Time Delay for UVP

• Remote ON/OFF function De–bounce Time

• Soft-Start function built-in

• 16–Pin Dual In–line Package

PIN CONFIGURATION

ORDERING INFORMATION

ORDER NUMBER

Package

Shipping

Top Marking

EST7502B

DIP 16

V33

V5

V12

PT

GND

RT

C1

C2

VADJ

OPNEGIN

OPOUT

VCC

DET

PG

SS

REM

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8