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  [图文]飞思卡尔MC33927三相FET预驱动方案           ★★★ 【字体:
飞思卡尔MC33927三相FET预驱动方案
作者:飞思卡尔    文章来源:飞思卡尔    点击数:    更新时间:2007-12-5    
飞思卡尔公司MC33927是场效应晶体管(FET)预驱动器,设计用于三相马达和其它相似的应用.MC33927包括三个高边FET预驱动器和三个低边FET预驱动器,它通过六个直接输入控制信号和MCU接口,而SPI端口用于设备厂起动和异步重置.输入逻辑电平3.0V和5.0V,输出逻辑电平为5.0V.本文介绍了MC33927的主要特性和应用方框图.
Freescale MC33927: Three-Phase Field Effect Transistor Pre-Driver
The MC33927 is a Field Effect Transistor (FET) pre-driver designed for three-phase motor control and similar applications. The integrated circuit (IC) uses SMARTMOS  technology.
The IC contains three high-side FET pre-drivers and three low-side FET pre-drivers. Three external bootstrap capacitors provide gate charge to the high side FETs. The IC interfaces to a MCU via six direct input control signals, a SPI port for device setup and asynchronous reset, enable and interrupt signals. Both 5.0V and 3.0V logic level inputs are accepted and 5.0V logic level outputs are provided.

特性:
Fully specified from 8.0V to 40V covers 12V and 24V automotive systems
Extended operating range from 6.0V to 58V covers 12V and 42V systems
1.0A gate drive capability with protection
Protection against reverse charge injection from CGD and CGS of external FETs
Includes a charge pump to support full FET drive at low battery voltages
Deadtime is programmable via the SPI port
Simultaneous output capability enabled via safe SPI command
INTERNAL BLOCK DIAGRAM



图1.MC33927 方框图.

>http://www.freescale.com/files/analog/doc/data_sheet/MC33927.pdf?pspll=1
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