AMC6821-Q1 Datasheet, PDF (11/54 Pages) Texas Instruments – INTELLIGENT TEMPERATURE MONITOR AND PWM FAN CONTROLLER

AMC6821-Q1
www.ti.com ...................................................................................................................................................................................................... SBAS475 – JUNE 2009
FUNCTIONAL BLOCK DIAGRAM
THERM
V_DD
GND
AMC6821
OVR
Remote
Sensing
Transistor _IN+
IN-
mP
THERM
Control
Temperature Threshold
Registers
Limit
Comparator
Local/Remote
Temperature Registers
ADC
On-Chip Diode
Temperature Sensor
Ref
Current Source
(I₁; I₀)
A0 A1
2
SMBus/I C
Interface
Chip Registers
Control Logic
SCLK
SDA
FAN-FAULT
SMBALERT
TACH Data
+V
Signal Conditioning
Fan Speed Counter
TACH
PWM ^{PWM Output}
+5V
Control
Automatic Fan Speed
Controller
PWM-MODE
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Product Folder Link(s): AMC6821-Q1
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