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TC652/TC653
Integrated Temperature Sensor & Brushless DC Fan
Controller with FanSense? Detect & Over-Temperature
Features
? Integrated Temperature Sensing and Multi-speed
Fan Control
Package Type
MSOP
? FanSense? Fan Fault Detect Circuitry
V DD 1
8 PWM
? Built-in Over-Temperature Alert (T OVER )
? Temperature Proportional Fan Speed Control for
Acoustic Noise Reduction and Longer Fan Life
? Pulse Width Modulation Output Drive for Cost
FAULT 2
SHDN 3
GND 4
TC652
TC653
7 GND
6 T OVER
5 SENSE
and Power Savings
? Solid-State Temperature Sensing
? ±1°C (Typical) Accuracy from 25°C to +70°C
? 2.8V – 5.5V Operating Range
? TC653 includes Auto Fan Shutdown
? Low Operating Current: 50 μ A (Typical)
Applications
General Description
The TC652/TC653 are integrated temperature sensors
and brushless DC fan speed controllers with
FanSense ? technology. The TC652/TC653 measure
their junction temperature and control the speed of the
fan based on that temperature, making them especially
suited for applications in modern electronic equipment.
?
?
?
?
?
?
Thermal Protection For Personal Computers
Digital Set-Top Boxes
Notebook Computers
Data Communications
Power Supplies
Projectors
The FanSense ? Fan Fault detect circuitry eliminates
the need for a more expensive 3-wire fan.
Temperature data is converted from the on-chip
thermal sensing element and translated into a
fractional fan speed from 40% to 100%. A temperature
selection guide in the data sheet is used to choose the
low and high temperature limits to control the fan. The
Related Literature
? Application Note: AN771
Device Selection Table
TC652/TC653 also include a single trip point over
temperature alert (T OVER ) that eliminates the need for
additional temperature sensors. In addition, the TC653
includes an auto fan shutdown function for additional
power savings.
The TC652/TC653 are easy to use, require no software
Part Number
TC652XXVUA
TC653XXVUA
X
A
B
C
D
E
F
G
Package
8-Pin MSOP
8-Pin MSOP
Temperature Range
-40 ° C to +125 ° C
-40 ° C to +125 ° C
Temperature
25
30
35
40
45
50
55
overhead and are therefore the ideal choice for
implementing thermal management in a variety of
systems.
The "X" denotes a suffix for temperature threshold settings.
Contact factory for other temperature ranges.
2002 Microchip Technology Inc.
DS21453B-page 1
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相关代理商/技术参数
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