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