A1448集成电路（IC）的电机驱动器控制器规格书PDF中文资料

A1448属于集成电路（IC）的电机驱动器控制器。由Allegro MicroSystems制造生产的A1448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 A1448 is a full-bridge motor driver designed to drive low-voltage, brushless DC motors. The device is designed to allow the user to control several functions with a single input control pin. The pin allows for direct input PWM for speed control, is used to initiate the active braking function to reduce motor stop time, and acts as an enable pin to engage micro-power sleep mode to reduce average power consumption when not in use. The A1448 is designed for use in vibration motor applications in portable devices that require fast stop-start cycles, such as haptic applications and vibration ring tones.

Features and Benefits

▪Low-voltage operation, 1.8 to 4.2 V

▪Multifunction CONTROL pin input:

▫Direct input PWM for speed control

▫Active braking for fast stop cycle

▫Sleep function to reduce average power consumption

▪Reverse voltage protection on VDD and CONTROL pins

▪Output thermal shutdown protection for robust performance

▪Soft switching algorithm to reduce audible switching noise and EMI

▪Hall chopper stabilization technique for precise signal response over operating range

▪Antistall feature guarantees continuous rotation and prevents overheating

▪Single-chip solution for high reliability

▪Miniature MLP/DFN package with industry-leading 0.40 mm maximum overall thickness