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.1.0 Oct.8, 2004
1/8
AP438/9
PWM Fan Speed Controller
Block Diagrams
VCC
compartor
-
+
OTP
Oscillator
-
VIN
+
PWM
compartor
PWM
GND
Absolute Maximum Ratings
Symbol
V
CC
VIN
OTP
PWM
P
D
P
D
T
ST
T
OP
V
OP
Supply Voltage
Input voltage
Over temperature output.
Output voltage to Ground
Power dissipation (SIP-4/5L)
Power dissipation (SOP-8L)
Storage temperature range
Operating temperature range
Operating voltage range
Parameter
Rating
20
20
20
20
0.5
0.8
-65 to 150
0 to +85
7.0 to 18
Unit
V
V
V
V
W
W
o
o
C
C
V
Anachip Corp.
www.anachip.com.tw
2/8
Rev.1.0 Oct.8, 2004
AP438/9
PWM Fan Speed Controller
Electrical Characteristics
Unless otherwise specified, guaranteed for Tj=25 C , V
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Embedded System
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