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
PWM
OTP
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
AP438/9
PWM Fan Speed Controller
Anachip Corp.
www.anachip.com.tw
Rev.0.5 Feb.12, 2004
2/8
Block Diagrams
VCC
OTP
VIN
GND
+
-
Oscillator
PWM
compartor
compartor
-
+
PWM
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V
CC
Supply
Voltage
20
V
VIN Input
voltage
20
V
OTP
Over temperature output.
20
V
PWM
Output voltage to Ground
20
V
P
D
Power dissipation (SIP-4/5L)
0.5
W
P
D
Power dissipation (SOP-8L)
0.8
W
T
ST
Storage temperature range
-65 to 150
o
C
T
OP
Operating temperature range
0 to +85
o
C
V
OP
Operating voltage range
7.0 to 18
V
AP438/9
PWM Fan Speed Controller
Anachip Corp.
www.anachip.com.tw
Rev.0.5 Feb.12, 2004
3/8
Electrical Characteristics
Unless otherwise specified, guaranteed for Tj=25
O
C , V
CC
=12V .
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
V
CC
Supply
Voltage
7.0
-
18 V
I
IN
Input Bias Current(V
IN
Pin)
V
IN
=2.0V, 0.5
2 7
uA
V
IN
Input Voltage Range
0
VCC-0.5
V
DUTY
PWM duty cycle range
0
100
%
V
IN(OTP)
OTP Detect Voltage
3.3
3.4
3.5
V
V
IN(Release)
OTP release Voltage
2.65
2.75
2.85
V
V
IN(HS)
OTP detect Voltage Hysteresis
450
650
850
mV
V
IN(PWM0)
Max Input voltage of 0% PWM
0.75
0.8
0.85
V
V
IN(PWM100)
Min Input voltage of 100% PWM
2.80 2.85 2.90 V
I
S
Supply Current
Output floating
2.5
mA
V
PWM(ON)
PWM transistor ON voltage
I
PWM
=500mA
continued
1.1
1.3
V
I
PWM
Max. sink current
500
mA
V
OTP(L)
OTP low level voltage
I
OTP
=20mA
0.3
0.6
V
I
OTP
Max. sink current
20
mA
F
OSC
OSC
Frequency
0
O
C<T
J
<85
O
C 22 30 38 Khz
Application Circuit
AP439
12V
NTC
12V
OTP
FAN
1K
104P
AP438/9
PWM Fan Speed Controller
Anachip Corp.
www.anachip.com.tw
Rev.0.5 Feb.12, 2004
4/8
Typical Characteristics
PWM ON Voltage v.s. Suppy Voltage
1.06
1.065
1.07
1.075
1.08
1.085
1.09
1.095
1.1
7
8
9 10 11 12 13 14 15 16 17 18
Suppy Voltage (V)
PWM ON Voltage (V)
Supply Current v.s. Suppy Voltage
2.42
2.43
2.44
2.45
2.46
2.47
2.48
2.49
2.5
2.51
7
8
9
10 11 12 13 14 15 16 17 18
Suppy Current (mA)
Suppy Voltage (V)
PWM ON Voltage v.s. System Loading
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
0
50 100 150 200 250 300 350 400 450 500 550
System Loading (mA)
PWM ON Voltage (V)
Frequency v.s. Temperature
29.6
30
30.4
30.8
31.2
31.6
32
32.4
32.8
-40 -20 0
20 40 60 80 100 120 140
Frequency (kHz)
T em perature ()
PWM On Voltage v.s.Temperature
(Io=100mA)
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
-10
0
10 20 30 40 50 60 70 80 90 100
PWM Transistor ON Voltage(V)
Temperature ()
PWM On Voltage v.s. Temperature
(Io=500mA)
1.025
1.03
1.035
1.04
1.045
1.05
1.055
1.06
1.065
-10 0
10 20 30 40 50 60 70 80 90 100
PWM Transistor ON Voltage(V)
Temperature ()
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
5/8
Marking Information
(1) SIP4/5L
AP43 X
X XX X X
Date code
XX : Nth week
X :Year
8:438
9:439
ID code: internal
Blank: normal
L: Lead Free Package
(2) SOP-8L
SOP-8L
( Top View )
Logo
ID code: internal
Year: "01" =2001
"02" =2002
Xth week: 01~52
~
1
8
5
AC
AP439
YY WW X X
Blank: normal
L: Lead Free Package
4
Part Number
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