HPFANG Datasheet, PDF (7/9 Pages) Champion Microelectronic Corp. – HP Power Supply Fan Controller DATA SHEET

http://www.championmicro.com.tw
HPFANG+/-
HP Power Supply Fan Controller DATA SHEET
Calculation of Thermal Resistor RTHERMOSITER and Error Amplifier Feedback Resistor RF (Figure 1.)
Thermal Resistor and Error Amplifier Feedback Resistor Relationship
(VREF − TFB) ₊ TEAO − TFB ₌
TFB
Rc
Rf
Rthemistor + Rseries
Full Speed RPM 50% Load
(5V − 2.5V ) ₊ 3.5V − 2.5V ₌
2.5V
When TEAO ~ 3.5V Duty100%
Rc
Rf
Rthemistor + Rseries
Half Speed RPM
(5V − 2.5V ) ₊ 2.5V − 2.5V ₌
2.5V
When TEAO ~ 2.5V
Rc
Rf
Rthemistor + Rseries
Duty50%
Minimum Speed RPM
(5V − 2.5V ) ₊ 1.5V − 2.5V ₌
2.5V
When TEAO ~ 1.5V Duty < 5%
Rc
Rf
Rthemistor + Rseries
APPLICATION CIRCUIT (HPFANG+/-)
Rc ^R1
15K
R4
Rt _100K CN1
2
Rs ^R7
0
1
CON2
R10
0.5K
Rf ^R2
4K
R5
10
C4
0.1uF
U1 HPFANG
1
TEAO
8
VREF
2
TFB
7
VCC
3
6
FANCMD FANPWMOUT
4
CAVERAGE
5
GND
HouseKeeping
R8
C1
0.01uF
R6
10
TACH
4
3
2
1
VCC
R3
10K
C3
C2
0.01uF 47uF/25V
NPN
R9
FAN1
UFan
CN2
1
2
CON2
2013/01/17 Rev. 1.2
Champion Microelectronic Corporation
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