This part is a kind of semiconductor called A3952SW.

Function of this product has FULL-BRIDGE PWM MOTOR DRIVER.

Manufacturers : Allegro MicroSystems

Image and pinout :

Some of the text within the PDF file :

3952 FULL-BRIDGE PWM MOTOR DRIVER A3952SB BRAKE REF RC GROUND GROUND LOGIC SUPPLY PHASE ENABLE 1 2 3 4 LOGIC 5 6 7 8 VBB VCC 12 11 10 9 GROUND SENSE OUTA LOAD SUPPLY VBB 16 15 14 13 LOAD SUPPLY OUTB MODE GROUND Data Sheet 29319.1* Designed for bidirectional pulse-width modulated current control of inductive loads, the A3952S– is capable of continuous output currents to ±2 A and operating voltages to 50 V. Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. The peak load current limit is set by the user’s selection of an input reference voltage and external sensing resistor. The fixed OFF-time pulse duration is set by a user-selected external RC timing network. Internal circuit protection includes thermal shutdown [ ... ]

A3952SW PDF Datasheet Download