A3908EEETR-T集成电路（IC）的电机驱动器控制器规格书PDF中文资料

A3908EEETR-T属于集成电路（IC）的电机驱动器控制器。由Allegro MicroSystems制造生产的A3908EEETR-T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。

描述 Description

The A3908 is a low voltage bidirectional DC motor driver with a typical input voltage range of 3 to 5.5 V and output currents up to 500 mA. The unique output full-bridge incorporates source side linear operation to allow a constant voltage across the motor coil. This regulated output minimizes motor voltage change due to I × RDS(on) variation and battery voltage tolerance.

Logic input pins are provided to control the motor direction of rotation, brake, and standby (< 500 nA supply current) modes and to allow optional PWM of the sink drivers. Internal protection circuitry includes thermal shutdown, undervoltage lockout, and crossover current (shoot-through) protection.

The A3908 is supplied in a 2 mm x 2 mm, 0.55 mm nominal height, 8-lead DFN package, with exposed thermal pad (package suffix EE). This small footprint package is lead (Pb) free, with 100 matte tin leadframe plating.

Applications include:

▪ Robotic actuators and pumps

▪ Portable printers/scanners

▪ Camera lens/shutter control

▪ Battery powered toys and games

▪ Low noise test instrumentation systems

Features and Benefits

▪ Constant voltage operation (adjustable)

▪ 500 mA output peak rating

▪ Low power standby mode

▪ Small 2 mm × 2 mm, 0.55 mm nominal height DFN package

▪ Typical input voltage range of 3 to 5.5 V

▪ Adjustable constant voltage or PWM operation

▪ Less than 500 nA standby mode current

▪ –40 to 85 operating temperature range