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AP438/9

PWM Fan Speed Controller

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.

General Descriptions

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

power transistor that controls the Fan current & Fan

speed. AP439 built-in over temperature alarm

flag.

Applications

- PC Power.

-

DC Fan

Pin Assignment

Front View

AP438

Pin Descriptions

Name

V

CC

VIN

OTP

PWM

GND

Description

Operating voltage input

Reference input voltage

Over Temperature protect flag.

PWM Open Collect Output.

Ground

OTP 1

VCC 2

VIN 3

PWM 4

8 GND

AP439

7 GND

6 GND

5 GND

GND

PWM

VIN

VCC

OTP

VCC

GND

SIP-4L

VIN

PWM

Ordering Information

AP439

Part Number

8

9

: AP438

: AP439

AP43 X X X X

Package

Lead Free

Packing

Blank : Tube

or bulk

A

: Taping

P : SIP-4/5L Blank : Normal

S : SOP-8L L : Lead Free Package

SOP-8L

SIP-5L

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

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