TC642BEUA by Microchip | APACMotion Motor Control | Avnet ASIA
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信息

TC642BEUA

Microchip

PWM Fan Motor Speed Controller 8-Pin MSOP Tube

制造商料号#: TC642BEUA

替代型号#: TC642BEUA


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描述

文档

替代/替换

信息

The TC642 is a switch mode fan speed controller for use with brushless DC fans. Temperature proportional speed control is accomplished using pulse width modulation (PWM). A thermistor (or other voltage output temperature sensor) connected to the VIN input 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 VMIN 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 VMIN (Pin 3) causes fan shutdown. The TC642 also features Microchip Technology's proprietary 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 shutdown mode. FAULT is also asserted if the PWM reaches 100% duty cycle, indicating a possible thermal runaway situation, although the fan continues to run. 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.

技术参数

  • Temperature Proportional Fan Speed for Acoustic Control and Longer Fan Life
  • Efficient PWM Fan Drive
  • 3.0V to 5.5V Supply Range: - Fan Voltage Independent of TC642 Supply Voltage - Supports any Fan Voltage
  • FanSense™ Fault Detection Circuits Protect Against Fan Failure and Aid System Testing
  • Shutdown Mode for "Green" Systems
  • Supports Low Cost NTC/PTC Thermistors
  • Space Saving 8-Pin MSOP Package
  • Over-temperature Indication

技术特性

描述
寻找类似物料
Type
PWM Fan Motor Speed Controller
Maximum Operating Current
0.4 mA
MSL Level
1
Max Processing Temp
260
Supplier Package
MSOP
Lead Finish
Matte Tin
Pin Count
8
Mounting
Surface Mount
Operating Temperature
-40 to 85 °C
Product Dimensions
3 x 3 x 0.85 mm

ECCN / UNSPSC

描述
ECCN:
3A991.a.1
计划交货期 B:
8542390000"
HTSN:
8542390001"
UNSPSC:
32101625
UNSPSC VERSION:
V15.1101
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