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

PWMOTP
AP439
VCC
GND
VIN
Front View
AP438
VCC GND
PWM
VIN
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
V
CC
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