A3951 Datasheet - Allegro MicroSystems

A3951 FULL-BRIDGE PWM MOTOR DRIVER

Outputs Disabled Forward Reverse Brake, See Note 4 H SUFFIX 'W', R θJA H L L X X H L X = 38°C/W H H 2 SUFFIX 'B', R θJA = 43°C/W L 125 150 Dwg. GP-032A 0 25 50 75 100 TEMPERATURE IN °C X = Irrelevant Z = High Impedance (source and sink both off) NOTE: Includes internal default Vsense le.

3951 A3951SB 1 2 3 4 LOGIC GROUND LOGIC SUPPLY PHASE ENABLE 5 6 7 8 VBB VCC 12 11 10 9 GROUND SENSE OUTA LOAD SUPPLY 16 15 14 13 LOAD SUPPLY OUTB GROUND GROUND FULL-BRIDGE PWM MOTOR DRIVER Designed for bidirectional pulse-width modulated current control of inductive loads, the A3951SB and A3951SW are 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 val.

A3951 Features

* I I I I I I I I ± 2 A Continuous Output Current Rating 50 V Output Voltage Rating Internal PWM Current Control Internal Transient Suppression Diodes Under-Voltage Lockout Internal Thermal Shutdown Circuitry Crossover-Current Protection Default Brake Current Limit Always order by complete part numbe

A3951_AllegroMicroSystems.pdf