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

- V
OUT
slew-rate minimum 100V/uS @ CL=3000pF
- I
OUT
(sink & source)=1.2 / 0.9 A
- 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
V
CC
Operating voltage input
V
R
Reference input voltage
V
DC
Duty cycle input voltage
V
OUT

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