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A5957

Allegro
Part Number A5957
Manufacturer Allegro
Description Full-Bridge PWM Gate Driver
Published Dec 7, 2023
Detailed Description FEATURES AND BENEFITS • PHASE/ENABLE/SLEEPn control logic • Overcurrent indication • Adjustable off-time and blank-time ...
Datasheet PDF File A5957 PDF File

A5957
A5957

Overview
FEATURES AND BENEFITS • PHASE/ENABLE/SLEEPn control logic • Overcurrent indication • Adjustable off-time and blank-time • Adjustable current limit • Adjustable gate drive • Synchronous rectification • Internal UVLO • Crossover-current protection • MOSFET VDS protection • Voltage output proportional to load current PACKAGE: 20-Pin QFN (suffix “ES”) with Exposed Thermal Pad A5957 Full-Bridge PWM Gate Driver DESCRIPTION Designed for pulse-width-modulated (PWM) control of DC motors, the A5957 is capable of 50 V operation and provides gate drive for an all N-channel external MOSFET bridge.
Input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals.
Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation.
Internal circuit protection includes VDS protection, thermal shutdown with hysteresis, undervoltage monitoring of VBB, and crossover-current protection.
The A5957 is supplied in a low-profile, 4 × 4 mm, 20-contact QFN package (suffix “ES”) with exposed thermal pad.
Not to scale 0.
1 µF CP2 CP1 System Controller A5957-DS, Rev.
5 MCO-0000349 optional TSD ISET UVLO RC SLEEPn PHASE ENABLE OCLn STANDBY Control Logic OCL Filter AIOUT HOLD ×10 VREF ÷10 CHARGE PUMP VREG VCP GATE DRIVE + – VCP VBB GHA GHB SB SA GLA GLB SENSE GND Functional Block Diagram 0.
1 µF VIN GHA SA GLA RSENSE Inrush current limit = VREF/10 * RSENSE August 13, 2020 A5957 Full-Bridge PWM Gate Driver SELECTION GUIDE Part Number A5957GESTR-T SPECIFICATIONS Ambient Temperature Range –40°C to 105°C Packing 1500 pieces per 7-inch reel ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Load Supply Voltage VBB Motor Outputs VSx SENSE VSENSE OCLn VREF ISET AIOUT Logic Input Voltage Range Junction Temperature Storage Temperature Range Operating Temperature Range VOCLn VREF VISET VAIOUT VIN TJ TS TA Notes VSx – VSENSE; VBB – VSx tW < 500 ns PHASE, ENABLE, ...


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