WS3253 datasheet(2/11 Pages) WINSEMI

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WS3253 Product Description

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

WIN SEM I

M ICROELECTRON ICS

Typical

Typical Application

Application

Application Circuit

Circuit

Pin Definition

Definition

Definition and

and

and Device

Device

Device Marking

Marking

WS3253 is available in DIP8 and SOP8 package:

Pin Function

Function

Function Description

Description

Name

Number

Pin Type

Type

Function

Function Description

Description

VCC

Power

Power supply

COMP

Loop Compensation

Loop Compensation for CV Stability

INV

Feedback Input

The voltage feedback from auxiliary winding. Connected to resistor

divider from auxiliary winding reflecting output voltage. PWM duty cycle is

determined by EA output and current sense signal at pin4.

Current Monitoring

Current sense input.

DRAIN

5/6

Power transistor drain

This pin connects directly to the primary lead of the transformer.

GND

7/8

GND

Ground

WS3253D8P

A1a

WS3253S8P

A1a

D: DIP8 S: SOP

P: no Pb

A:wafer information;

1:Ver.; a: Package Code

2C:Y+M(2=2012 C=12 Month

(1,2…A=10,B=11,C=12)

V C C

C O M P

I N V

C S

G N D

D R A I N

D I P 8

V C C

C O M P

I N V

C S

G N D

D R A I N

S O P 8

A C

NA U X

V C C

C O M P

I N V

C S

G N D

G ra in

W S 3 2 5 3

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