Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation, and 'phase', 'enable' and 'mode' inputs are provided for use in controlling the speed, torque, direction and brake and coast functions of a DC motor.
High and low side synchronous rectification reduces power dissipation and can eliminate the need for expensive Schottky diodes. The low-resistance DMOS outputs also reduce power dissipation, and allow the device to operate with higher average output currents because of the lower die temperature
Protection features include thermal shutdown with hysteresis, undervoltage lockout and crossover current protection. Special power-up sequencing is not required.
This new motor driver is targeted at the office automation and industrial markets where there is a demand for compact, power-efficient solutions for controlling multiple motors. By integrating two motor drivers in one package the A3995 is more cost effective than most discrete IC motor drivers with
similar ratings. The compact package is an advantage in applications where PC board space is at a premium.
The A3995 is supplied in a lead (Pb) free 36-lead QFN package with exposed power tab for enhanced thermal dissipation. It has a 6 mm ( 6 mm footprint and 0.90 mm nominal height.