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A4939

Allegro
Part Number A4939
Manufacturer Allegro
Description Automotive Three Phase MOSFET Driver
Published Mar 27, 2020
Detailed Description A4939 Automotive Three Phase MOSFET Driver FEATURES AND BENEFITS • High current 3-phase gate drive for N-channel MOSFET...
Datasheet PDF File A4939 PDF File

A4939
A4939

Overview
A4939 Automotive Three Phase MOSFET Driver FEATURES AND BENEFITS • High current 3-phase gate drive for N-channel MOSFETs • Cross-conduction protection • 5.
5 to 50 V supply voltage range • Regulated logic supply voltage output option • Motor phase short to supply and short to ground detection • Undervoltage, overtemperature monitors • Low current Sleep mode option APPLICATIONS • Electronic power steering (EPS, EHPS, EAS) • Hydraulic pumps • Engine cooling fan • Gearbox actuator PACKAGES Not to scale 28-pin TSSOP with exposed thermal pad (LP package) 28-contact QFN 5 mm × 5 mm × 0.
85 mm (ET package) DESCRIPTION The A4939 is a three-phase controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications.
A unique charge pump regulator provides full (>10 V) gate drive at battery voltages down to 7 V and allows the A4939 to operate with reduced gate drive at battery voltages down to 5.
5 V.
A bootstrap capacitor is used to provide the abov...


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