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TC648VOA Datasheet

  • TC648VOA

  • Fan Speed Controller with Auto-Shutdown and Over-Temperature...

  • 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 TC648
Supply Voltage
- Supports any Fan Voltage
鈥?Over-temperature Fault Detection
鈥?Automatic Shutdown Mode for 鈥淕reen鈥?Systems
鈥?Supports Low Cost NTC/PTC Thermistors
鈥?Space Saving 8-Pin MSOP Package
TC648
Package Types
SOIC/PDIP/MSOP
V
IN
C
F
V
AS
GND
1
2
3
4
8
7
V
DD
V
OUT
OTF
NC
Fan Speed Controller with Auto-Shutdown
and Over-Temperature Alert
TC648
6
5
General Description
The TC648 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
IN
input
furnishes the required control voltage of 1.25V to 2.65V
(typical) for 0% to 100% PWM duty cycle. The TC648
can be configured to operate in either auto-shutdown or
minimum speed mode. In auto-shutdown mode, fan
operation is automatically suspended when measured
temperature (V
IN
) is lower than a user programmed
minimum setting (V
AS
). The fan is automatically
restarted, and proportional speed control restored,
when V
IN
exceeds V
AS
(plus hysteresis). Operation in
minimum speed mode is similar to auto-shutdown
mode, with the exception that the fan is operated at a
user programmed minimum setting when the mea-
sured temperature is low. An integrated Start-up Timer
ensures reliable motor start-up at turn-on, and when
coming out of shutdown or auto-shutdown mode.
The over-temperature fault output (OTF) is asserted
when the PWM reaches 100% duty cycle, indicating a
possible thermal runaway situation.
The TC648 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
Computers
Portable Computers
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.
DS21448C-page 1

TC648VOA 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(wú)刷（BLDC）

  • -

  • 1

  • -

  • -

  • 3 V ~ 5.5 V

  • 0°C ~ 85°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 8-SOICN

  • 管件

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