TC642B集成电路（IC）的电机驱动器控制器规格书PDF中文资料

TC642B属于集成电路（IC）的电机驱动器控制器。由微芯科技股份有限公司制造生产的TC642B电机驱动器，控制器产品属于电机驱动器和控制器电源管理集成电路 (PMIC) 系列，可用于控制或操作从某电源施加到电机或相关机电执行器的电源。所实现的具体功能和特性集根据预期负载和预期应用的特性有很大差异，范围从用于有刷电机的简单开环速度控制到基于步进电机的高级闭环运动控制。

Description

The TC642B/TC647B devices are new versions of the existing TC642/TC647 fan speed controllers. These devices are switch mode, fan speed controllers that incorporate a new fan auto-restart function. Temperature-proportional speed control is accomplished using pulse width modulation. A thermistor (or other voltage output temperature sensor) connected to the VIN input supplies the required control voltage of 1.20V to 2.60V (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.

Features

• Temperature-Proportional Fan Speed for Acoustic Noise Reduction and Longer Fan Life

• Efficient PWM Fan Drive

• 3.0V to 5.5V Supply Range:

- Fan Voltage Independent of TC642B/TC647B Supply Voltage

- Supports any Fan Voltage

• FanSense™ Fault Detection Circuit Protects Against Fan Failure and Aids System Testing

• Shutdown Mode for Green Systems

• Supports Low Cost NTC/PTC Thermistors

• Over-Temperature Indication (TC642B only)

• Fan Auto-Restart

• Space-Saving 8-Pin MSOP Package

Applications

• Personal Computers & Servers

• LCD Projectors

• Datacom & Telecom Equipment

• Fan Trays

• File Servers

• General Purpose Fan Speed Control