dual DMOS full bridge motor driver IC is targeted at the office automation and
consumer and industrial markets. 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 40V. Integrated charge
pump capacitors reduce external component cost and count.
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.
A4954ELPTR-T is provided in a low-profile 16-pin TSSOP package with exposed
thermal pad (suffix LP) that is lead (Pb) free, with 100 percent matte tin lead
frame plating. It is priced at $1.37 in quantities of 1,000.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.