Datasheet > MC642DR2

MC642DR2

更新时间： 2024-11-25 21:15:23

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
16页	220K
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数据手册

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MC642DR2 数据手册

The MC642 is a pulse width modulation (PWM) fan speed

controller for use with DC motors. It provides temperature

proportional speed control. A thermistor connected to the V_INinput

furnishes the required control voltage of 1.25V to 2.65V for 0% to

100% PWM duty cycle. Minimum fan speed is set by a simple resistor

http://onsemi.com

divider on the V

input. An integrated Start–Up Timer ensures

MIN

reliable motor start–up at turn–on, coming out of Shutdown Mode, or

following a transient fault. A stalled, open, or unconnected fan causes

the MC642 to trigger its start–up timer once. If the fault persists, the

FAULT output goes low, and the device is latched in Shutdown Mode.

SO–8

D SUFFIX

CASE TBD

Features

• Shutdown Mode for Power Saving

PRELIMINARY INFORMATION

• Supports Low Cost NTC/PTC Thermistors

• Temperature Proportional Speed for Acoustic Control /

Longer Fan Life

• Fan Voltage Independent of MC642 Supply Voltage

• Fault Detection Circuits Protect Against Fan Failure and

Aid System Testing

• Operating Temperature Range: 0°C to +85°C

8–Pin DIP

P SUFFIX

CASE TBD

Typical Applications

• Power Supplies

PRELIMINARY INFORMATION

• Personal Computers

• UPS’s, Power Amplifiers, etc.

PIN CONFIGURATION

TYPICAL APPLICATION DIAGRAM

MC642D

MC642P

OUT

FAULT

MIN

GND

+12 V

SENSE

+5 V

MC642

Reset

FAN

From

Temp

Sensor

FAULT

Fault

MC642

Detected

BASE

ORDERING INFORMATION

min

out

Device

Package

Shipping

MC642DR2

8–Pin SOIC

2500 Tape/Reel

50 Tape/Reel

SENSE

GND

SENSE

(Optional)

SENSE

MC642P

8–Pin Plastic DIP

Semiconductor Components Industries, LLC, 1999

Publication Order Number:

February, 2000 – Rev. 0

MC642/D

12 3 4 5 6 7...16

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