A3904中文资料低压音圈电机驱动器数据手册Allegro规格书

描述 Description

This part is discontinued. Samples are no longer available.

Date of status change: March 4, 2013.

Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales.

The A3904 is a voice coil motor (VCM) driver, with an I2C-compatible serial interface. Designed for camera autofocus and zoom applications, this high accuracy digital IC is provided in a WLCSP package ideal for portable devices. Its operating voltage range is 2.4 to 5.5 V, and its maximum output current is 127 mA.

Output current is programmed via the I2C interface, in 500 µA increments, with clock rates up to 400 kHz. I2C inputs set the internal D-to-A converter output voltage that is the reference for linear current control via a MOSFET output sink transistor. To conserve battery power, a logic low signal on the SLEEPZ input disables the output MOSFET and reduces the supply current to <0.5 µA.

A3904 internal protection features include thermal shutdown and undervoltage lockout. Logic input levels are independent of the supply voltage. The operating temperature range is –40°C to 85°C.

特性 Features

• Fixed I2C logic thresholds
• 8-bit D-to-A converter
• 500 µA resolution
• Low voltage I2C serial interface
• Low current-draw sleep mode
• 2.4 to 5.5 V operation
• 1.1 mm × 0.7 mm, 0.5 mm maximum overall height WLCSP

简介

A3904属于集成电路（IC）的电机驱动器控制器。由制造生产的A3904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。