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3953 - FULL-BRIDGE PWM MOTOR DRIVER

Description

115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1995, 2000 Allegro MicroSystems, Inc.

R OUTB 3953 FULL-BRIDGE PWM MOTOR DRIVER ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS 5 RθJT = 6.0°C/W 4 3 SUFFIX 'B', R θJA = 4

Features

  • I I I I I I I ± 1.3 A Continuous Output Current 50 V Output Voltage Rating 3 V to 5.5 V Logic Supply Voltage Internal PWM Current Control Saturated Sink Drivers (Below 1 A) Fast and Slow Current-Decay Modes Automotive Capable I Sleep (Low Current Consumption) Mode I Internal TransientSuppression Diodes I Internal ThermalShutdown Circuitry I Crossover-Current and UVLO Protection Always order by complete part number: Part Number A3953SB A3953SLB Package 16-Pin DIP 16-Lead SOIC RθJA 43°C/W 67°C/W.

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Datasheet Details

Part number 3953
Manufacturer Allegro MicroSystems
File Size 230.05 KB
Description FULL-BRIDGE PWM MOTOR DRIVER
Datasheet download datasheet 3953 Datasheet
Additional preview pages of the 3953 datasheet.

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Full PDF Text Transcription

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3953 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 FULL-BRIDGE PWM MOTOR DRIVER Designed for bidirectional pulse-width modulated (PWM) current control of inductive loads, the A3953S— is capable of continuous output currents to ±1.3 A and operating voltages to 50 V. Internal fixed off-time PWM currentcontrol 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.
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