TC653 Microchip Technology Inc., TC653 Datasheet

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TC653

Manufacturer Part Number
TC653
Description
Integrated Temperature Sensor & Brushless Dc Fan Controller With Fansense Detect & Over-temperature
Manufacturer
Microchip Technology Inc.
Datasheet

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Features
• Integrated Temperature Sensing and Multi-speed
• FanSense™ Fan Fault Detect Circuitry
• Built-in Over-Temperature Alert (T
• Temperature Proportional Fan Speed Control for
• Pulse Width Modulation Output Drive for Cost
• 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
The "X" denotes a suffix for temperature threshold settings.
Contact factory for other temperature ranges.
©
TC652XXVUA
TC653XXVUA
Part Number
Fan Control
Acoustic Noise Reduction and Longer Fan Life
and Power Savings
2002 Microchip Technology Inc.
Controller with FanSense™ Detect & Over-Temperature
Integrated Temperature Sensor & Brushless DC Fan
C
D
G
X
A
B
E
F
8-Pin MSOP
8-Pin MSOP
Package
Temperature Range
Temperature
-40°C to +125°C
-40°C to +125°C
OVER
25
30
35
40
45
50
55
)
TC652/TC653
Package Type
General Description
The TC652/TC653 are integrated temperature sensors
and brushless DC fan speed controllers with
FanSense
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
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
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.
FAULT
SHDN
GND
technology. The TC652/TC653 measure
V
DD
Fan Fault detect circuitry eliminates
1
2
3
4
OVER
TC652
TC653
MSOP
) that eliminates the need for
8
7
6
5
PWM
GND
T
SENSE
DS21453B-page 1
OVER

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TC653 Summary of contents

Page 1

... TC652/TC653 also include a single trip point over temperature alert (T 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. 25 ...

Page 2

... TC652/TC653 Typical Application Diagram + GND DS21453B-page 2 +12V DC Fan TC652 300mA TC653 PWM DD 2 FAULT GND 7 FanSense™ SHDN OVER 0.01µF SENSE GND SENSE R Over-Temp SHDN Control Alert Fan Fault Alert µController Max. SENSE 2Ω 2002 Microchip Technology Inc. ...

Page 3

... Input Voltage (V to GND) ................................... +6V DD Output Voltage (OUT to GND) ................................. 6V Voltage On Any Pin ....... (GND – 0.3V Package Thermal Resistance (θ Operating Temperature Range ......... -40°C to +125°C Storage Temperature ......................... -65°C to +150°C TC652/TC653 ELECTRICAL SPECIFICATIONS Electrical Characteristics 2.8V to 5.5V, SHDN = V DD Symbol Parameter V Supply Voltage DD I ...

Page 4

... SHDN Fan Shutdown, Active-Low Input. During Shutdown mode the chip still monitors temperature and T 4 GND Ground return for all TC652/TC653 functions. 5 SENSE Detect Fan Pulses Input. Pulses are detected at this pin as fan rotation chops the current through the sense resistor, R ...

Page 5

... TC652/ TC653 to trigger its Start-up Timer once. If the FAULT persists, the FAULT output goes low, and the device is latched in its Shutdown mode. To release the fan from shutdown, toggle the SHDN or V pin ...

Page 6

... PWM is low and the fan is automatically shut off (Auto- shutdown mode). This feature is ideal for notebook computers and other portable applications that need to conserve as much battery power as possible and thus run a fan when it is only absolutely needed. The TC653 . SENSE will continue to be active monitor temperature for T ...

Page 7

... You would order the part number TC652AEVUA. As another example, suppose you wanted the fan to turn on at 30°C and go to full speed at 45°C. You would order the part number TC653BEVUA. 2002 Microchip Technology Inc. © 4.0 TYPICAL APPLICATIONS 4 ...

Page 8

... FAULT 25˚C SOURCE 1.0 0 2.8V 0.8 DD 0.7 0.6 0 5.5V DD 0.4 0.3 0.2 0.1 0 (mA) SOURCE TC653, Fan is Not Running SHDN is Connected 25˚ 5.0 0 5.0 0.0 PWM 5.0 FAULT 0 1sec/Div 2002 Microchip Technology Inc. © ...

Page 9

... Microchip Technology Inc. © User Direction of Feed P Standard Reel Component Orientation for TR Suffix Device Pitch (P) Part Per Full Reel 2500 PIN 1 .197 (5.00) .122 (3.10) .114 (2.90) .189 (4.80) .043 (1.10) 6° MAX. MAX. .028 (0.70) .016 (0.40) Dimensions: inches (mm) TC652/TC653 W Reel Size 13 in .008 (0.20) .005 (0.13) DS21453B-page 9 ...

Page 10

... TC652/TC653 NOTES: DS21453B-page 10 2002 Microchip Technology Inc. © ...

Page 11

... The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2002 Microchip Technology Inc. © TC652/TC653 DS21453B-page 11 ...

Page 12

... TC652/TC653 NOTES: DS21453B-page 12 2002 Microchip Technology Inc. © ...

Page 13

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. © TC652/TC653 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 14

... Palazzo Taurus Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Microchip Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 04/20/ 2002 Microchip Technology Inc. © ...

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