A3940中文资料全桥式功率MOSFET控制器数据手册Allegro规格书

描述 Description

This part is discontinued. Samples are no longer available. Date of status change: August 30, 2017

For existing customer transition, and for new customers or new applications, refer to the A3941.

The A3940KLP and A3940KLW are designed specifically for automotive applications that require high-power motors. Each provides four high-current gate drive outputs capable of driving a wide range of n-channel power MOSFETs in a full-bridge configuration.

Bootstrap capacitors are utilized to provide the above-battery supply voltage required for n-channel FETs. An internal charge pump for the high side allows for dc (100% duty cycle) operation of the bridge.

Protection features include supply under/overvoltage, thermal shutdown, and motor lead short-to-battery and short-to-ground fault notification, and a programmable dead-time adjustment for crossconduction prevention. The overvoltage trip point is user adjustable.

The A3940 is supplied in a choice of two power packages, a 28-pin TSSOP with an exposed thermal pad (package type LP), and a 28-pin wide-body SOIC (package type LW). Both package types are available in lead (Pb) free versions, with 100 % matte-tin leadframe plating (suffix –T).

特性 Features

• Drives wide range of n-channel MOSFETs
• Charge pump to boost gate drive at low-battery-input conditions
• Bootstrapped gate drive with charge pump for 100% duty cycle
• Synchronous rectification
• Fault diagnostic output
• Adjustable dead-time cross-conduction protection
• Motor lead short-to-battery and short-to-ground protection
• Undervoltage/overvoltage protection
• -40°C to +150°C, TJ operation
• Thermal shutdown

简介

A3940属于集成电路（IC）的电机驱动器控制器。由制造生产的A3940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。