August 30, 2011
Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation. Internal circuit protection includes overcurrent protection (OCP), motor lead short to ground or supply, thermal shutdown with hysteresis, under voltage monitoring of VBB, and crossover current protection. The A4952 includes a FAULT pin and the ability to change the behavior of the OCP latch based on the logic level applied to the RTRY pin. These devices are primarily targeted at the office automation market; however, they are also suitable for commercial and industrial applications requiring a brush DC motor driver IC.
The A4952ELYTR-T is available in a 10-pin MSOP package and the A4953ELJTR-T is available in an 8-pin SOICN package. Both packages feature an exposed pad for enhanced thermal dissipation and are lead (PB) free with 100% matte tin plated lead frames.
Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com.