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A4956: Full-Bridge PWM Gate Driver

A4955, A4956, A5957 Full Bridge PWM Driver Gate and Gate Driver Packaging Image

A4956 Datasheet

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Documentation and Resources

Description

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Packaging

Designed for pulse-width-modulated (PWM) control of DC motors, the A4956 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 A4956 is supplied in a low-profile 4×4 mm, 20-contact QFN package (suffix “ES”) and a 20-lead eTSSOP (suffix “LP”), both with exposed thermal pad.

PHASE/ENABLE/MODE 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
Decay-mode selection for external PWM
A4956K is AEC-Q100 Grade 1 qualified
Commercial temperature grade (A4956G: –40°C to 105°C)
Automotive temperature grade (A4956K: –40°C to 125°C)

Part Number Specifications and Availability

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Part Number	Architecture	Control Interface	RDS (ON) (Ohms)	Sleep Current	Current Sense Amplifier	Supply Voltage Min (V)	Supply Voltage Max (V)	Peak Output Current (A)	Package	Market	Part Composition / RoHS Data	Check Stock
A4956GESTR-T	Gate Driver	PH/EN	Not specified	5	Integrated	5.50	50.00	-	20-Pin QFN	-	View Data	Check Distributor Stock
A4956GLPTR-T	Gate Driver	PH/EN	Not specified	5	Integrated	5.50	50.00	-	20-Pin TSSOP	-	View Data	Check Distributor Stock
A4956KLPTR-T	Gate Driver	PH/EN	Not specified	5	Integrated	5.50	50.00	-	20-Pin TSSOP	-	View Data	Check Distributor Stock

Part Number	Architecture	Control Interface	RDS (ON) (Ohms)	Sleep Current	Current Sense Amplifier	Supply Voltage Min (V)	Supply Voltage Max (V)	Package
A4956GESTR-T	Gate Driver	PH/EN	Not specified	5	Integrated	5.50	50.00	20-Pin QFN
A4956GLPTR-T	Gate Driver	PH/EN	Not specified	5	Integrated	5.50	50.00	20-Pin TSSOP
A4956KLPTR-T	Gate Driver	PH/EN	Not specified	5	Integrated	5.50	50.00	20-Pin TSSOP

Documentation and Resources

Documentation

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All Types Selection Guide

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Document Type	Document Name
Selection Guide	Allegro Product Selection Guide