A3998中文资料Dual DMOS Full Bridge Motor Driver With Serial Port Control and Dual Regulators数据手册Allegro规格书

描述 Description

Designed to provide the motor driver and power supply requirements for printers and office automation equipment. This integrated power IC incorporates two high current, high performance, full bridge outputs, capable of 1.5 A at 50 V. Additionally two power supply rails are provided for microprocessor or DSP supplies. A switching buck regulator steps the supply down to a low voltage output that is adjustable from 3.3 to 5 V. This voltage can be used to supply external 5 V rails, it also feeds back into the part and supplies the integrated linear regulator which is adjustable from 1 to 2.5 V.

The A3998 serial port provides flexible configuration for the dual full bridge motor driver. Two full bridges can be programmed to control one stepper motor or two DC motors. Both bridges have integrated fixed off-time PWM control with programmable decay mode selection.

The A3998 is supplied in a low profile, 32-contact QFN, 5 × 5 mm, 0.90 mm nominal height, with exposed thermal pad (suffix ET). The package is lead (Pb) free with 100% matte tin leadframe plating.

These parts are in production but have been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currentlyrestricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available.

Date of status change: July 1, 2019.

Deadline for receipt of LAST TIME BUY orders: December 27, 2019.

Recommended Substitutions: Contact Allegro Sales

特性 Features

• 1 to 2.5 V configurable linear regulator output
• ±1.5 A, 50 V output rating per bridge
• Serial port control
• Synchronous rectification for low power dissipation
• Crossover-current protection
• OCP protection

简介

A3998属于集成电路（IC）的电机驱动器控制器。由Allegro制造生产的A3998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。