WS3256 datasheet(2/9 Pages) WINSEMI

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WS3256 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

WS 3256D8P

3256D8P

A1a

Typical

Typical Application

Application

Application Circuit

Circuit

Pin Definition

Definition

Definition and

and

and Device

Device

Device Marking

Marking

WS3256 is available in DIP8 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

V C C

C O M P

I N V

C S

G N D

D R A I N

D I P 8

D: DIP8

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)

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 6

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