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TC650ACVUA

Description
PWM Fan Controller
File Size158KB,18 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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TC650ACVUA Overview

PWM Fan Controller

TC650ACVUA Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
MountingSurface Mount
Package Height0.85
Package Length3
Package Width3
PCB changed8
Supplier PackageMSOP
Pin Count8
Lead ShapeGull-wing
TC650/TC651
Tiny Integrated Temperature Sensor & Brushless DC Fan
Controller with Overtemperature Alert
Features
• Integrated Temperature Sensing and Multi-speed
Fan Control
• Built-in Overtemperature Alert (T
OVER
)
• 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
• ±1C (typ.) Accuracy from 25C to +70C
• Operating Range: 2.8V – 5.5V
TC651
includes Automatic Fan Shutdown
• Low Operating Current: 50 µA (typ.)
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 (T
OVER
) 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.
Applications
Thermal Protection For Personal Computers
Digital Set-Top Boxes
Notebook Computers
Data Communications
Power Supplies
Projectors
Package Type
8-Pin MSOP
V
DD
1
NC 2
SHDN 3
GND 4
8 PWM
Related Literature
• Application Note 771 (DS00771)
TC650
TC651
7 GND
6 T
OVER
5 NC
2001-2012 Microchip Technology Inc.
DS21450D-page 1
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