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A4954ELPTR-T
发布时间： 2015/9/10 10:22:24 | 322 次阅读
A4954: Dual Full-Bridge DMOS PWM Motor Driver
Designed for pulse width modulated (PWM) control of two DC motors, the A4954 is capable of peak output currents to ±2 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.
Designed for pulse width modulated (PWM) control of two DC motors, the A4954 is capable of peak output currents to ±2 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.
The A4954 is provided in a low-profile 16-pin TSSOP package with exposed thermal pad (suffix LP) that is lead (Pb) free, with 100% matte tin leadframe plating.
A4954: 双路全桥式 DMOS PWM 电动机驱动器
通过脉宽调制 (PWM) 控制两个直流电动机，A4954 能够承受峰值输出电流达 ±2 安培，并使电压达到 40 伏特。
输入端通过应用外部 PWM 控制信号以控制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。
内部电路保护包括过电流保护、电动机接地或电源短路、因滞后引起的过热关机、VBB 欠压监视以及交叉电流保护。
A4954 采用带有外置散热板的 16 引脚 TSSOP 小型封装（后缀 LP）。该封装为无铅封装，且引脚框采用 100% 雾锡电镀。