f75387 Feature Integration Technology Inc., f75387 Datasheet - Page 45

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

Example 1:
TEMPERATURE MONITOR
Pin9(GND)
Pin9(GND)
12. F75387 Application Circuit
T1
T2
C4
C5
3300pF
3300pF
1
2
3
4
5
6
N.C.
200K
10K
2.2K
20K
2.2K
R5
PULL_UP Voltage
THERMDA
THERMDC
3906
Q1
PNP
VCC3
VCC3
VCC3
VCC5
VCC5
N/A
Function Trapping
PWMOUT1
FAN SPIN-UP SPEED
SDATA
SCLK
R5
60%
100%
60%
100%
60%
100%
4.7K
Example 2:
VCC
R6
4.7K
TEMPERATURE MONITOR (Thermistor)
VREF
VREF
R7
I2C Address
VCC3V
R8
4.7K
0x5A
0x5C
0x5C
0x5A
0x5C
0x5A
4.7K
R9
R14
R15
T1
T2
PWMOUT1
PWMOUT2
FANIN1
FANIN2
10K 1%
10K 1%
FAN Type
DAC
DAC
PWM
PWM
PWM
PWM
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
U1
F75387
43
VREF
VIN1
VIN2
VIN3
GND
VCC
D1+
D2+
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 F75387. 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
T1
T2
VREF
VIN1
VIN2
VIN3
VCC3V
F75387 Thermal Diode recommended Layout
C1
0.1U
R10
33
C2
4.7U
VIN1,VIN2,VIN3 SIGNALS BEST INPUT LEVEL IS ABOUT 1V
VIN1
VIN2
VIN3
Title
Size
Date:
VOLTAGE MONITOR
B
R1
R2
R3
R4
R11
R12
Feature Integration Technology Inc.
Document Number
F75387 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