A3949: DMOS Full-Bridge Motor Driver

Designed for PWM (pulse width modulated) control of dc motors, the A3949 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 reduce power dissipation during PWM operation.

Internal circuit protection includes thermal shutdown with hysteresis, undervoltage monitoring of VBB and VCP, and crossover current protection.

The A3949 is supplied in a power package, a 16-pin plastic SOIC with a copper batwing tab (part number suffix LB). The packages are lead (Pb) free, with 100% matte tin leadframes.

Also see: A3950 DMOS Full-Bridge Motor Driver.

This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available.Date of status change: June 2, 2014.
Recommended Substitutions: A3950SLPTR-T
For existing customer transition, and for new customers or new applications, contact Allegro Sales.

• Single supply operation
• Very small outline package
• Low RDS(ON) outputs
• Sleep function
• Internal UVLO
• Crossover current protection
• Thermal shutdown protection