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3948 - DMOS FULL-BRIDGE PWM MOTOR DRIVER

General 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.

Key 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.

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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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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.