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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC652 Datasheet

(TC652 / TC653) Integrated Temperature Sensor & Brushless DC Fan Controller

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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
• FanSense™ Fan Fault Detect Circuitry
• Built-in Over-Temperature Alert (TOVER)
• Temperature Proportional Fan Speed Control for
Acoustic Noise Reduction and Longer Fan Life
• Pulse Width Modulation Output Drive for Cost
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: 50µA (Typical)
Applications
• Thermal Protection For Personal Computers
• Digital Set-Top Boxes
• Notebook Computers
• Data Communications
• Power Supplies
• Projectors
Related Literature
• Application Note: AN771
Device Selection Table
Part Number
TC652XXVUA
TC653XXVUA
Package
8-Pin MSOP
8-Pin MSOP
Temperature Range
-40°C to +125°C
-40°C to +125°C
Package Type
VDD 1
FAULT 2
SHDN 3
GND 4
MSOP
TC652
TC653
8 PWM
7 GND
6 TOVER
5 SENSE
General Description
The TC652/TC653 are integrated temperature sensors
and brushless DC fan speed controllers with
FanSensetechnology. 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.
The FanSenseFan 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
TC652/TC653 also include a single trip point over
temperature alert (TOVER) 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
overhead and are therefore the ideal choice for
implementing thermal management in a variety of
systems.
X Temperature
A 25
B 30
C 35
D 40
E 45
F 50
G 55
The "X" denotes a suffix for temperature threshold settings.
Contact factory for other temperature ranges.
© 2002 Microchip Technology Inc.
DS21453B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC652 Datasheet

(TC652 / TC653) Integrated Temperature Sensor & Brushless DC Fan Controller

No Preview Available !

TC652/TC653
Typical Application Diagram
+12V
+5V VDD
TC652
TC653
1 VDD
PWM 8
1k
2 FAULT GND 7
3 SHDN
4 GND
TOVER 6
SENSE 5
0.01µF
CSENSE
GND
SHDN Control
Fan Fault Alert
Over-Temp
Alert
µController
DC Fan
300mA
Max.
FanSense™
RSENSE
2
DS21453B-page 2
© 2002 Microchip Technology Inc.


Part Number TC652
Description (TC652 / TC653) Integrated Temperature Sensor & Brushless DC Fan Controller
Maker Microchip Technology
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TC652 Datasheet PDF






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