Low RDS(on) outputs
Overcurrent protection
Motor lead short-to-supply protection
Short-to-ground protection
Sleep function
Synchronous rectification
Diagnostic output
Internal undervoltage lockout (UVLO)
Crossover-current protection

A3950: DMOS Full-Bridge Motor Driver

Designed for PWM (pulse width modulated) control of dc motors, the A3950 is capable of peak output currents to ±2.8 A and operating voltages to 36 V.

PHASE and ENABLE 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 motor lead short-tosupply / short-to-ground, thermal shutdown with hysteresis, undervoltage monitoring of VBB and VCP, and crossover-current protection.

The A3950 is supplied in a thin profile (<1.2 mm overall height) 16 pin TSSOP package (LP), and a very thin (0.75 mm nominal height) QFN/MLP package. Both packages provide an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte tin leadframe plating.

A3950: DMOS 全桥式电动机驱动器

为直流电动机的 PWM（脉宽调制）控制设计而成，A3950 能够承受峰值输出电流达±2.8 安培，并使电压达到 36 伏特。

“相位”与“启用”输入端用来控制外部应用 PWM 控制信号的直流电动机的速度与方向。内部同步整流控制电路用来降低脉宽调制 (PWM) 操作时的功率消耗。

内部电路保护包括因滞后、VBB 及 VCP 欠压监视及交叉电流保护引起的电动机引脚电源短路/接地短路与过热关机。

A3950 采用外形较薄（<1.2 毫米总高度）、16 引脚封装 TSSOP (LP) 及非常薄的（0.75 毫米标称高度）QFN/MLP 封装。两种封装具有外露焊盘，以提高散热功能，且均是无铅产品，引脚框采用 100% 雾锡电镀。