PWM Fan Speed Controller
Block Diagrams
VCC
compartor
-
+
Oscillator
PWM
compartor
-
VIN
+
GND
Absolute Maximum Ratings
Symbol
VCC
VIN
OTP
PWM
PD
PD
TST
TOP
VOP
Parameter
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
AP438/9
OTP
PWM
Rating
Unit
20
V
20
V
20
V
20
V
0.5
W
0.8
W
-65 to 150
oC
0 to +85
oC
7.0 to 18
V
Anachip Corp.
www.anachip.com.tw
Rev.0.5 Feb.12, 2004
2/8