A3953集成電路（IC）的電機驅動器控制器規(guī)格書PDF中文資料

A3953屬于集成電路（IC）的電機驅動器控制器。由Allegro MicroSystems制造生產的A3953電機驅動器，控制器產品屬于電機驅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機電執(zhí)行器的電源。所實現的具體功能和特性集根據預期負載和預期應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。

Designed for bidirectional pulse-width modulated (PWM) current control of inductive loads, the A3953S— is capable of continuous output currents to ±1.3 A and operating voltages to 50 V. Internal fixed off-time PWM currentcontrol circuitry can be used to regulate the maximum load current to a desired value. The peak load current limit is set by the user’s selection of an input reference voltage and external sensing resistor. The fixed off-time pulse duration is set by a user- selected external RC timing network. Internal circuit protection includes thermal shutdown with hysteresis, transient-suppression diodes, and crossover current protection. Special power-up sequencing is not required.

FEATURES

■ ±1.3 A Continuous Output Current

■ 50 V Output Voltage Rating

■ 3 V to 5.5 V Logic Supply Voltage

■ Internal PWM Current Control

■ Saturated Sink Drivers (Below 1 A)

■ Fast and Slow Current-Decay Modes

■ Automotive Capable

■ Sleep (Low Current Consumption) Mode

■ Internal TransientSuppression Diodes

■ Internal ThermalShutdown Circuitry

■ Crossover-Current and UVLO Protection