f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 47

• Manufacturer Part Number: f75387
• Description: ?1o C Accuracy H/w Monitor Ic With Automatic Fan Speed Control
• Manufacturer: Feature Integration Technology Inc.

Example 1:
For F75387
R12 OPEN
R12=200K
R12= 10K
R12=2.2K
For F75375S (R13 OPEN)
R12 OPEN
R12=4.7K
TEMPERATURE MONITOR
GND(pin9)
GND(pin9)
R41 ON :
R41 OFF:
13. F75387 Application Circuit & Co-Layout Circuit with F75375
TEMPERATURE MONITOR (Thermal Diode)
ADDRESS SELECT
PWMOUT1
3300pF
VREF
T2
T1
C3
C4
T1
Addr=0x5Ah
Addr=0X5Ch
Addr=0X5Ch
Addr=0X5Ah
Addr=0x5Ah
Addr=0X5Ch
R41
R12
R13
100K
F75375 Thermal Diode Voltage Mode
F75387 Thermal Diode Current Mode
3300P
20K 1%
200K
THERMDA
VCC3V
THERMDA
THERMDC
(D+)
3906
60%
Full FAN
60%
Full FAN
Q1
PNP
C15
3300p
FAN
FAN
THERMDC
(D-)
SDATA
SCLK
4.7K
Example 2:
R2
4.7K
TEMPERATURE MONITOR (Thermistor)
VREF
VREF
R3
VCC3V
R4
4.7K
4.7K
PWMOUT1
PWMOUT2
R5
R14
R15
SMI#
EXT_CLK
SCLK
SDATA
FANIN1
FANIN2
T1
T2
PWMOUT1
PWMOUT2
FANIN1
FANIN2
10K 1%
10K 1%
EXT_CLK
SCLK
SDATA
10K THERMISTOR
RT2
10K THERMISTOR
RT1
SMI#
1
2
3
4
5
6
7
8
FANIN1
GPIO0/FAININ2/VOLT_FAULT#
PWM1/DAC1/ADDR_TRAP
GPIO1/PWM2/DAC2/FAN_FAULT#
GPIO2/SMI#/FAN_FAULT#/LED
OVT#/VOLT_FAULT#GPIO3/CLKIN
SCLK
SDATA
U3
1
2
3
4
5
6
7
8
FANIN1
FAININ2/GPIO0
PWMout1/ADDR_TRAP
PWMOUT2/GPIO1
FAN_FAULT#/SMI#/GPIO2
VOLT_FAULT#/OVT#/GPIO3/CLKIN
SCLK
SDATA
U1
F75387
F75375S
45
VREF
VIN1
VIN2
VIN3
GND
VCC
D1+
D2+
VREF
VCC
VIN1
VIN2
VIN3
GND
VT1
VT2
1. The THERMDA and THERMDC tracks Must Not pass through/by PWM
POWER-MOS, Linear Regulator and Clock generator. Keep as far as
possible from POWER MOS.
2. Place an external 3300pF input filter capacitors across THERMDA,
THERMDC and close to the F75387S. Near the pin GND (Pin# 9) Must Be
placed a through hole into the GND Plane before connect to the
external 3300pF capacitor.
16
15
14
13
12
11
10
9
16
15
14
13
12
11
10
9
T1
T2
VREF
VIN1
VIN2
VIN3
T1
T2
VREF
VIN1
VIN2
VIN3
VCC3V
VCC3V
F75387S Thermal Diode recommended Layout
C14
0.1U
R40
33
C1
0.1U
R6
33
C13
4.7U
C2
4.7U
VIN1,VIN2,VIN3 SIGNALS BEST INPUT LEVEL IS ABOUT 1V
VIN1
VIN2
VIN3
Title
Size
Date:
VOLTAGE MONITOR
B
R1
R7
R8
R9
R10
R11
Feature Integration Technology Inc.
Document Number
F75375S_F75387S Co-Lay out Demo Circuit
100K
100K
150K
100K
47K
100K
VDD1
VDD2
VDD3
(2.0V)
(2.5V)
(1.5V)
Sheet
1
of
2
Rev
0.1
July
, 2007
0.27P