Description

Designed for pulse-width modulated (PWM) current control of bipolar microstepping stepper motors, the A3973 is capable of continuous output currents to ±1 A and operating voltages to 35 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.

Features and Benefits

? ±1 A, 35 V Continuous Output Rating

? Low RDS(on) DMOS Output Drivers

? Optimized Microstepping via 6-Bit Linear DACs

? Programmable Mixed, Fast, and Slow Current Decay Modes

? 4 MHz Internal Oscillator for Digital Timing

? Serial-Interface Controls Chip Functions

? Synchronous Rectification for Low Power Dissipation

? Internal UVLO and Thermal Shutdown Circuitry

? Crossover-Current Protection

? Precision 2 V Reference

? Inputs Compatible with 3.3 or 5 V Control Signals

? Sleep and Idle Modes

A3973SLB-T屬于集成電路（IC） > 電機驅(qū)動器，控制器。Allegro MicroSystems制造生產(chǎn)的A3973SLB-T電機驅(qū)動器，控制器產(chǎn)品屬于電機驅(qū)動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或相關(guān)機電執(zhí)行器的電源。所實現(xiàn)的具體功能和特性集根據(jù)預(yù)期負載和預(yù)期應(yīng)用的特性有很大差異，范圍從用于有刷電機的簡單開環(huán)速度控制到基于步進電機的高級閉環(huán)運動控制。