Microchip TC651 Bruksanvisning
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TC651
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2001-2012 Microchip Technology Inc. DS21450D-page 1
TC650/TC651
Features
• Integrated Temperature Sensing and Multi-speed
Fan Control
• Built-in Overtemperature Alert (TOVER)
• Temperature-proportional Fan Speed Control for
Acoustic Noise Reduction and Longer Fan Life
• Pulse Width Modulation (PWM) Output Drive for
Cost and Power Savings
• Solid-state Temperature Sensing
• ±1C (typ.) Accuracy from 25C to +70C
• Operating Range: 2.8V – 5.5V
•TC651 includes Automatic Fan Shutdown
• Low Operating Current: 50 µA (typ.)
Applications
• Thermal Protection For Personal Computers
• Digital Set-Top Boxes
• Notebook Computers
• Data Communications
• Power Supplies
• Projectors
Related Literature
• Application Note 771 (DS00771)
General Description
The TC650/TC651 are integrated temperature sensors
and brushless DC fan speed controllers. The TC650/
TC651 measure the junction temperature and control
the speed of the fan based on that temperature, making
them especially suited for applications in modern
electronic equipment.
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
TC650/TC651 also include a single trip point over-
temperature alert (TOVER) that eliminates the need for
additional temperature sensors. In addition, the TC651
features an auto fan shutdown function for additional
power savings.
The TC650/TC651 are easy to use, require no software
overhead and are, therefore, the ideal choice for
implementing thermal management in a variety of
systems.
Package Type
18
2 7
36
45
NC
VDD PWM
TOVER
NCGND
8-Pin MSOP
SHDN
GND
TC650
TC651
Tiny Integrated Temperature Sensor & Brushless DC Fan
Controller with Overtemperature Alert
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | TC651 |
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