TC642EV

更新时间： 2024-11-05 22:42:27

品牌	Logo	应用领域
美国微芯 - MICROCHIP		风扇控制器
页数	文件大小	规格书
28页	471K
描述
PWM Fan Speed Controller with FanSense⑩ Technology

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中文翻译

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数据手册

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TC642EV 数据手册

TC642

• Temperature Proportional Fan Speed for Acoustic

Control and Longer Fan Life

• Efficient PWM Fan Drive

• 3.0V to 5.5V Supply Range:

PWM Fan Speed Controller with FanSense^™Technology

Features

Package Types

SOIC/PDIP/MSOP

OUT

TC642

- Fan Voltage Independent of TC642

Supply Voltage

- Supports any Fan Voltage

MIN

FAULT

SENSE

GND

• FanSense™ Fault Detection Circuits Protect

Against Fan Failure and Aid System Testing

General Description

• Shutdown Mode for "Green" Systems

• Supports Low Cost NTC/PTC Thermistors

• Space Saving 8-Pin MSOP Package

• Over-temperature Indication

The TC642 is a switch mode fan speed controller for

use with brushless DC fans. Temperature proportional

speed control is accomplished using pulse width mod-

ulation (PWM). A thermistor (or other voltage output

temperature sensor) connected to the V input fur-

Applications

• Power Supplies

• Personal Computers

• File Servers

• Telecom Equipment

• UPSs, Power Amps, etc.

• General Purpose Fan Speed Control

nishes the required control voltage of 1.25V to 2.65V

(typical) for 0% to 100% PWM duty cycle. Minimum fan

speed is set by a simple resistor divider on the V

MIN

input. An integrated Start-up Timer ensures reliable

motor start-up at turn-on, coming out of shutdown

mode or following a transient fault. A logic low applied

to V

(Pin 3) causes fan shutdown.

MIN

The TC642 also features Microchip Technology's pro-

prietary FanSense™ technology for increasing system

reliability. In normal fan operation, a pulse train is

present at SENSE (Pin 5). A missing pulse detector

monitors this pin during fan operation. A stalled, open

or unconnected fan causes the TC642 to trigger its

Start-up Timer once. If the fault persists, the FAULT

output goes low and the device is latched in its shut-

down mode. FAULT is also asserted if the PWM

reaches 100% duty cycle, indicating a possible thermal

runaway situation, although the fan continues to run.

See Section 5.0, “Typical Applications”, for more

information and system design guidelines.

Available Tools

• Fan Controller Demonstration Board (TC642DEMO)

• Fan Controller Evaluation Kit (TC642EV)

The TC642 is available in the standard 8-pin plastic

DIP, SOIC and MSOP packages and is available in the

commercial, extended commercial and industrial

temperature ranges.

2002 Microchip Technology Inc.

DS21444C-page 1

12 3 4 5 6 7...28

中文翻译

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与TC642EV相关器件

型号	品牌	获取价格	描述	数据表
TC642VOA	MICROCHIP	获取价格	PWM Fan Speed Controller with FanSense⑩ Techn
TC642VOA713	MICROCHIP	获取价格	BRUSHLESS DC MOTOR CONTROLLER, PDSO8, 0.150 INCH, PLASTIC, SOIC-8
TC642VOA723	MICROCHIP	获取价格	BRUSHLESS DC MOTOR CONTROLLER, PDSO8, SOIC-8
TC642VOATR	MICROCHIP	获取价格	Brushless DC Motor Controller, PDSO8, SOIC-8
TC642VPA	MICROCHIP	获取价格	PWM Fan Speed Controller with FanSense⑩ Techn
TC642VUA	MICROCHIP	获取价格	PWM Fan Speed Controller with FanSense⑩ Techn
TC642VUA713	MICROCHIP	获取价格	BRUSHLESS DC MOTOR CONTROLLER, PDSO8, PLASTIC, MSOP-8
TC643VOA	MICROCHIP	获取价格	BRUSHLESS DC MOTOR CONTROLLER, PDSO8, SOIC-8
TC643VPA	MICROCHIP	获取价格	BRUSHLESS DC MOTOR CONTROLLER, PDIP8, PLASTIC, DIP-8
TC643VUA	MICROCHIP	获取价格	BRUSHLESS DC MOTOR CONTROLLER, PDSO8, MSOP-8

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