通过脉宽调制 (PWM) 控制直流电动机，A4950 能够提供 ±3.5 安培的峰值输出电流，工作电压为 40 伏特。
该产品可提供输入端子，通过外部施加的 PWM 控制信号控制直流电动机的速度与方向。采用内部同步整流控制电路降低脉宽调制 (PWM) 操作时的功率消耗。
内部电路保护包括过电流保护、电动机引脚接地短路或电源短路、带时延的过热关机、VBB 欠压监视以及交叉电流保护。
A4950 采用带有外露散热板的 8 引脚 SOICN 小型封装（后缀 LJ）。该封装为无铅封装，且引脚框采用 100% 雾锡电镀。
A4950: Full-Bridge DMOS PWM Motor Driver
Designed for pulse width modulated (PWM) control of DC motors, the A4950 is capable of peak output currents to ±3.5 A and operating voltages to 40 V.
Input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals. Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation.
Internal circuit protection includes overcurrent protection, motor lead short to ground or supply, thermal shutdown with hysteresis, undervoltage monitoring of VBB, and crossover-current protection.
For high ambient operating temperature applications, an automotive grade device is offered (A4950K). The K grade device is tested across extended temperature and voltage ranges to ensure compliance in automotive or industrial applications.
