TC652_13 Datasheet, PDF (1/16 Pages) Microchip Technology – Integrated Temperature Sensor & Brushless DC Fan Controller with FanSense™ Detect & Over-Temperature

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 (T_OVER)
• 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: 50A (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
V_{DD 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
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.
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
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
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.
 2002-2012 Microchip Technology Inc.
DS21452C-page 1