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A4928

Allegro
Part Number A4928
Manufacturer Allegro
Description Automotive Half-Bridge MOSFET Driver
Published May 25, 2019
Detailed Description A4928 Automotive Half-Bridge MOSFET Driver FEATURES AND BENEFITS • Half-bridge MOSFET driver • Bootstrap gate drive f...
Datasheet PDF File A4928 PDF File

A4928
A4928

Overview
A4928 Automotive Half-Bridge MOSFET Driver FEATURES AND BENEFITS • Half-bridge MOSFET driver • Bootstrap gate drive for N-channel MOSFET bridge • Cross-conduction protection with adjustable dead time • Charge pump regulator for low supply voltage operation • 5.
5 to 50 V supply voltage operating range • 5 V CMOS Logic I/O • SPI-compatible serial interface • Bridge control by direct logic inputs or serial interface • Programmable gate drive • Current sense amplifier • Programmable diagnostics • Automotive AEC-Q100 qualified • A2SIL™ product—device features for 2 - safety-critical systems APPLICATIONS • Anti-lock braking systems (ABS) • HVAC (blower fan) • DC pumps (fuel, oil, water) • Solenoids and actuators • Similar industrial applications PACKAGE: 24-lead TSSOP with exposed pad (suffix LP) Not to scale DESCRIPTION The A4928 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a half-bridge arrangement and is specifically designed for automotive applications with high-power inductive loads, such as brush DC motors solenoids and actuators.
The A4928 is intended for automotive systems that must meet ASIL requirements.
In common with other Allegro A2SIL™ products, this device incorporates features to complement proper system design, allowing users to achieve the required ASIL level.
A unique charge pump regulator provides full gate drive for battery voltages down to 5.
5 V for most applications.
A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs.
The half bridge can be controlled by independent logic-level inputs or through the SPI-compatible serial interface.
The external power MOSFETs are protected from shoot-through by a programmable dead time.
Integrated diagnostics provide indication of multiple internal faults, system faults, and power bridge faults, and can be configured to protect the power MOSFETs under most shortcircuit conditions.
In addition to providing full...


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