AP438/9

PWM Fan Speed Controller

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.0.5 Feb.12, 2004

1/8

Features

- Built-in 30Khz OSC provide 0%~100% PWM

output

- Over Temperature Protector(OTP) flag.

(AP439 only).

- Open collect output(OTP & PWM pins).

- SIP-4L package for AP438.

- SIP-5L, SOP-8L package for AP439.

Applications

- PC Power.

- DC Fan

General Descriptions

The AP438/9 series’s PWM output has built-in NPN

power transistor that controls the Fan current & Fan

speed.

AP439 built-in over temperature alarm

flag.

Pin Assignment

AP439

Front View

AP438

SOP-8L

SIP-5L

SIP-4L

GND

1

2

3

4

8

7

6

5

OTP

GND

VIN

AP439

GND

VCC

GND

PWM

Pin Descriptions

Name

Description

Operating voltage input

VIN

Reference input voltage

OTP

Over Temperature protect flag.

PWM

PWM Open Collect Output.

GND

Ground

Ordering Information

Part Number

P : SIP-4/5L

S : SOP-8L

AP43 X X X X

8

: AP438

9

: AP439

Package

Packing

Blank : Tube

Lead Free

Blank : Normal

L : Lead Free Package

or bulk

A

: Taping