HPFANG Datasheet, PDF (3/9 Pages) Champion Microelectronic Corp. – HP Power Supply Fan Controller DATA SHEET

http://www.championmicro.com.tw
HPFANG+/-
HP Power Supply Fan Controller DATA SHEET
Simplified Block Diagram (HPFANG+/-)
U3
OSC
TEAO 1
TFB 2
U2
-
OP ^.
2.5V
+
FANCMD 3
1.5V
CAVERAGE 4
U1
-
.
+
VCC
5.0V
OP
+
.
-
8 VREF
CLK
-
.
+
+
PWM CMP
S
Q
R
Q
HPFANG+ =
1.5V
U1
+
.
-
7 VCC
6 FANPWMOUT
5 GND
HPFANG- =
1.5V
U1
-
.
+
PIN DESCRIPTION
Pin No. Symbol
Description
Fan Controller’s OP Output which is one of
1
TEAO
FANPWMOUT duty control signal
Fan controller’s OP inverting Input. It is power supply
2
TFB
temperature signal
Motherboard Temperature signal. It can be a variable
speed and variable value PWM input signal. It is
3
FANCMD
converted to an average signal and then controls
FANPWMOUT duty
Averaged FANCMD signal. It is one of FANPWMOUT
4
CAVERAGE
duty control signal
Operating Voltage
Min. Typ. Max. Unit
0
4.3
V
2.5
V
1.5
1.375
5
V
3.625 V
5
GND
Ground
0
V
6
FANPWMOUT Controller Output
7
VCC
Positive Supply
Maximum 3mA buffered output for the internal 5V
8
VREF
reference when VCC=12V
0
5.7
V
8
15
V
5
2013/01/17 Rev. 1.2
Champion Microelectronic Corporation
3