3948 - DMOS FULL-BRIDGE PWM MOTOR DRIVER

Datasheet Summary

Description

Serial Interface.

The A3948 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

s s s s s s s ±1.5 A, 50 V Continuous Output Rating Low rDS(on) Outputs 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 A3948SB A3948SLB Package 24-pin batwing DIP 24-lead batwing SOIC RθJA 40°C/W 77°C/W RθJT 6°C/W 6°C/W 3948 DMOS FULL-BRIDGE PWM MOTOR DRIVER.

Allegro MicroSystems

📥 Download Datasheet

Datasheet Details

Part number	3948
Manufacturer	Allegro MicroSystems
File Size	146.50 KB
Description	DMOS FULL-BRIDGE PWM MOTOR DRIVER
Datasheet	3948 Datasheet
Additional preview pages of the 3948 datasheet.

📁 Similar Datasheet

3940 - Full-Bridge Power MOSFET Controller (Allegro Micro Systems)
3946 - Half-bridge Power MOSFET Controller (Allegro Micro Systems)

Other Datasheets by Allegro MicroSystems

Full PDF Text Transcription

Click to expand full text

3948 A3948SLB (SOIC) CP CP2 CP1 PHASE OSC GROUND GROUND LOGIC SUPPLY ENABLE DATA CLOCK STROBE DMOS FULL-BRIDGE PWM MOTOR DRIVER 1 2 3 4 5 θ 24 23 NC 22 21 VBB 20 19 18 V DD 17 16 VREG RANGE NO CONNECTION OUTB LOAD SUPPLY GROUND GROUND SENSE OUTA NO CONNECTION MODE REF Designed for pulse-width modulated (PWM) current control of dc motors, the A3948SB and A3948SLB are capable of continuous output currents to ±1.5 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. Similar devices with outputs rated to ±2 A are available as the A3958SB/SLB.

Published: Mar 30, 2005 |