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3974 - DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER

General Description

Serial Interface.

The A3974SED is controlled via a 3-wire (clock, data,strobe) serial port.

The programmable functions allow maximum flexibility in configuring the PWM to the motor drive requirements.

Key Features

  • s ±1.5 A, 50 V Continuous Output Rating s Low rDS(on) DMOS Output Drivers s Programmable Slow, Fast, and Mixed Current-Decay Modes s Serial-Interface Controls Chip Functions s Synchronous Rectification for Low Power Dissipation s Internal UVLO and Thermal Shutdown Circuitry s Crossover-Current Protection s Sleep and Idle Modes Always order by complete part number: A3974SED . 3974 DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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3974 LOAD 43 SUPPLY1 SENSE1 OUT1A ENABLE1 GND GND GND NC OUT1B NC NC DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER Designed for pulse-width modulated (PWM) current control of two dc motors, the A3974SED is capable of output currents to ±1.5 A and operating voltages to 50 V. Internal fixed off-time PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes. Independant ENABLE input terminals are provided for use in controlling the speed and torque of each dc motor with externally applied PWM control signals. Synchronous rectification circuitry allows the load current to flow through the low rDS(on) of the DMOS output driver during the current decay.