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A3958 - DMOS FULL-BRIDGE PWM MOTOR DRIVER

Datasheet Summary

Description

Serial Interface.

The A3958 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.

Features

  • I I I I I I I ±2 A, 50 V Continuous Output Rating Low rDS(on) Outputs (270 mΩ, Typical) Programmable Mixed, Fast, and Slow Current-Decay Modes Serial Interface Controls Chip Functions Synchronous Rectification for Low Power Dissipation Internal UVLO and Thermal-Shutdown Circuitry Crossover-Current Protection Always order by complete part number: Part Number A3958SB A3958SLB Package 24-pin batwing DIP 24-lead batwing SOIC RθJA 40°C/W 56°C/W RθJT 6°C/W 6°C/W 3958 DMOS FULL-BRIDGE PWM MOTOR DRIVE.

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Datasheet preview – A3958

Datasheet Details

Part number A3958
Manufacturer Allegro MicroSystems
File Size 405.40 KB
Description DMOS FULL-BRIDGE PWM MOTOR DRIVER
Datasheet download datasheet A3958 Datasheet
Additional preview pages of the A3958 datasheet.

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Full PDF Text Transcription

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3958 A3958SLB CP CP2 CP1 PHASE OSC GROUND GROUND LOGIC SUPPLY ENABLE DATA CLOCK STROBE CHARGE PUMP DMOS FULL-BRIDGE PWM MOTOR DRIVER Designed for pulse-width modulated (PWM) current control of dc motors, the A3958SB and A3958SLB are capable of continuous output currents to ±2 A and operating voltages to 50 V. Internal fixed offtime PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes. 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. The ENABLE input can be programmed via the serial port to PWM the bridge in fast or slow current decay.
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