A3980屬于集成電路（IC）的電機(jī)驅(qū)動(dòng)器控制器。由Allegro MicroSystems制造生產(chǎn)的A3980電機(jī)驅(qū)動(dòng)器，控制器產(chǎn)品屬于電機(jī)驅(qū)動(dòng)器和控制器電源管理集成電路 (PMIC) 系列，可用于控制或操作從某電源施加到電機(jī)或相關(guān)機(jī)電執(zhí)行器的電源。所實(shí)現(xiàn)的具體功能和特性集根據(jù)預(yù)期負(fù)載和預(yù)期應(yīng)用的特性有很大差異，范圍從用于有刷電機(jī)的簡(jiǎn)單開環(huán)速度控制到基于步進(jìn)電機(jī)的高級(jí)閉環(huán)運(yùn)動(dòng)控制。

描述 Description

The A3980 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full-, half-, eighth-, and sixteenth step modes, at up to 35 V and ±1 A. The A3980 includes a fixed off-time current regulator which has the ability to operate in slow, fast, or mixed decay modes. This results in reduced audible motor noise, increased step accuracy, and reduced power dissipation.

The translator is the key to the easy implementation of the A3980. Simply inputting one pulse on the step input drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. The A3980 interface is an ideal fit for applications where a complex μP is unavailable or overburdened.

Features and Benefits

? Typical application up to ±1 A, 35 V output rating

? Low RDS(ON) outputs, 0.67 Ω source, 0.54 Ω sink typical

? Automatic current decay mode detection/selection

? 3.0 V to 5.5 V logic supply voltage range

? Mixed, fast, and slow current decay modes

? Synchronous rectification for low power dissipation

? Internal OVLO, UVLO, and thermal shutdown circuitry

? Crossover current protection

? Short to supply/ground and short/low load current diagnostics