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TC647VUA Datasheet

  • TC647VUA

  • PWM Fan Speed Controller with FanSense Technology

  • 28頁(yè)

  • MICROCHIP   MICROCHIP

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M
Features
鈥?Temperature Proportional Fan Speed for Acoustic
Control and Longer Fan Life
鈥?Efficient PWM Fan Drive
鈥?3.0V to 5.5V Supply Range:
- Fan Voltage Independent of TC647
Supply Voltage
- Supports any Fan Voltage
鈥?FanSense鈩?Technology Fault Detection Circuits
Protect Against Fan Failure and Aid System
Testing
鈥?Shutdown Mode for "Green" Systems
鈥?Supports Low Cost NTC/PTC Thermistors
鈥?Space Saving 8-Pin MSOP Package
TC647
Package Types
SOIC/PDIP/MSOP
V
IN
C
F
V
MIN
GND
1
2
3
4
8
V
DD
V
OUT
FAULT
SENSE
PWM Fan Speed Controller with FanSense
鈩?/div>
Technology
TC647
7
6
5
General Description
The TC647 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 V
IN
furnishes 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
MIN
(Pin 3) causes fan shutdown.
The TC647 also features Microchip Technology's pro-
prietary FanSense鈩?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 TC647 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.
The TC647 is available in the 8-pin plastic DIP, SOIC
and MSOP packages and is available in the industrial
and extended commercial temperature ranges.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Power Supplies
Personal Computers
File Servers
Telecom Equipment
UPSs, Power Amps
General Purpose Fan Speed Control
Available Tools
鈥?Fan Controller Demonstration Board (TC642DEMO)
鈥?Fan Controller Evaluation Kit (TC642EV)
錚?/div>
2002 Microchip Technology Inc.
DS21447C-page 1

TC647VUA 產(chǎn)品屬性

  • 100

  • 集成電路 (IC)

  • PMIC - 電機(jī)和風(fēng)扇控制器，驅(qū)動(dòng)器

  • -

  • 風(fēng)扇控制器，無刷（BLDC）

  • -

  • 1

  • -

  • -

  • 3 V ~ 5.5 V

  • 0°C ~ 85°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 8-MSOP

  • 管件

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