Datasheet

100 pF
+3.3V
PWM Output
to Fan
To SMBus
interface
control
circuitry
Remote diode-
connected transistor
inside of a Processor
on 45 nm or 65 nm
process
OPTIONAL
Capacitor
is close to
pins 3 and 4
+3.3V
1.2k
Tach. input
from Fan
Fan voltage
+12 or +5 VDC
10k
13k
1k
Tach In
0.1
100 pF
10 PF
These two capacitors
are close to Pin 2
4-Pin DC Brushless
Fan Module with
Tachometer Output
and PWM Input
Fan V+
+3.3V
1.2k
1.2k
LM96163
6
7
8
9
VDD
D+
D-
PWM
SMBDAT
TACH
ALERT
GND
10
SMBCLK
TCRIT
2
3
4
5
1
1.2k
1.2k
+3.3V
To Processor Power
Supply Shutdown
TruTherm
or
Traditional
Diode
Bias and
Control
Internal Diode
LM96163-LLP10
D+
D-
2 - Wire
Serial
Interface
SMBDAT
SMBCLK
Temp Reading,
Temp Limit,
Hysteresis, and
Temp Sensor
Filter Registers
Status and Status Mask Registers and Logic
Comparators
PWM Fan Control
Registers
PWM Fan
Control
PWM
'6 ADC
IIR
Filter
Analog
Filter
ALERT
TACH
Tachometer
Detection
TCRIT
LM96163
www.ti.com SNAS433D –JUNE 2008–REVISED MAY 2013
Simplified Block Diagram
Typical Application
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