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AMT49100

Allegro
Part Number AMT49100
Manufacturer Allegro
Description 80V Automotive Three-Phase MOSFET Driver
Published Dec 23, 2020
Detailed Description AMT49100 80 V Automotive Three-Phase MOSFET Driver FEATURES AND BENEFITS • 3-phase bridge MOSFET driver • Bootstrap ...
Datasheet PDF File AMT49100 PDF File

AMT49100
AMT49100

Overview
AMT49100 80 V Automotive Three-Phase MOSFET Driver FEATURES AND BENEFITS • 3-phase bridge MOSFET driver • Bootstrap gate drive for N-channel MOSFET bridge • Cross-conduction protection with adjustable dead time • Fixed-frequency buck converter • Operation at any PWM duty cycle up to and including 100% • Programmable gate drive strength • 10 to 80 V supply voltage operating range • Programmable 3.
3 or 5 V CMOS compatible logic I/O • Three programmable current sense amplifiers • SPI-compatible serial interface • Bridge control by direct logic inputs or serial interface • Programmable control input logic sense • Extensive programmable diagnostics • Diagnostic verification • Safety-assist features • Automotive AEC-Q100 qualified • A2-SIL™ product—device features for 2 - safety-critical systems* PACKAGE: 48-pin LQFP with exposed thermal pad (suffix JP) Not to scale *The AMT49100 was developed in accordance with ISO 26262:2011 as a hardware safety element out of context with ASIL D capability for use in automotive safety-related systems when integrated and used in the manner prescribed in the applicable safety application note and datasheet.
DESCRIPTION The AMT49100 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a 3-phase bridge arrangement and is specifically designed for 48 V automotive power applications with high-power inductive loads, such as BLDC motors.
A fixed-frequency buck converter provides a regulated gate drive and bootstrap charge voltage over the full supply voltage range from 10 to 80 V.
A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs.
The bootstrap charge is maintained by an additional charge pump providing 0-100% PWM with no duty cycle restriction.
Full control over all six power MOSFETs in the 3-phase bridge is provided, allowing motors to be driven with block commutation or sinusoidal excitation.
The power MOSFETs are protected from shoot-th...


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