AP436

Synchronous Rectifier MOSFET Driver

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev.1.0 Oct 4, 2005

1/6

Features

- Safety considered.

- Reduce power system thermal & increase

system efficiency.

- Pb-free packages: SOT89-5L, SOP-8L

Application

- Power Adapter.

（

50~120W for LCD Monitor & NB…etc.）

General Descriptions

The AP436 is a high-speed controller designed to

drive N-channel power MOSFET used as

synchronous rectifiers in high current, high

frequency fly-back converters. The circuit does

not require any ties to the primary side and

derives its operating power directly from the

secondary. The circuit functions are structured by

anticipating transformer output transitions then

turns the power MOSFET on or off before the

transitions of the transformer to minimize body

drain diode conduction and reduce associated

losses.

Pin Assignment

( Top View )

1

2

3

74

5

GND

SOT89-5L

AP436

TAB

(GND)

V

DC

V

R

V

CC

V

OUT

1

2

3

4

7

6

5

V

DC

GND

GND

V

R

V

OUT

SOP-8L

AP436

( Top View )

GND

V

CC

GND

8

Pin Descriptions

Name

Description

Operating voltage input

Reference input voltage

Duty cycle input voltage

Output voltage for driving N channel

MOSFET

GND

Ground

Ordering Information

S : SOP-8L

Y : SOT89-5L

Packing

Blank: Tube

A : Taping

Package

AP436 XX X