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A3931KJP-T, A3932, A3932EQT

Table of contents:
Info of A3931KJP-T
Info of A3932
Info of A3932EQT

A3931KJP-T, A3932, A3932EQT Selling Leads, Datasheet

MFG:ALLEGRO Package Cooled:07+ D/C:0803+

A3931KJP-T, A3932, A3932EQT Datasheet download

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Part Number: A3931KJP-T

MFG: ALLEGRO

Package Cooled: 07+

D/C: 0803+

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A3932 General Description

The A3932 is a three-phase MOSFET controller for use with bipolar brushless DC motors. Its high gate-current drive capability allows driving a wide range of N-channel power MOSFETs and can support motor supply voltages to 50 V. Bootstrapped high-side drive blocks provide the floating positive supplies for the gate drive and minimize the component count normally required. The high-side circuitry also employs a unique FET monitoring circuit that ensures the gate voltages are at the proper levels before turn-on and during the ON cycle.

Internal fixed off-time PWM current-control circuitry can be used to regulate the maximum load current to a desired value. The peak load-current limit is set by the user’s selection of an input reference voltage and external sensing resistor. The fixed off-time pulse duration is set by a user-selected external RC timing network. For added flexibility, the PWM input can be used to provide speed/torque control, allowing the internal current control circuit to set the maximum current limit.

Optional synchronous rectification is included. This feature will short out the current path through the power MOSFET reverse body diodes during the PWM off-cycle current decay. This can minimize power dissipation in the power MOSFET, eliminate the need for external power clamp diodes, and potentially allow more economical choices for the MOSFET application.

The A3932 includes the commutation logic for Hall sensors configured for 120 degree spacing. Power MOSFET protection features include bootstrap capacitor charging current monitor, undervoltage monitor, motor-lead short-to-ground, and thermal shutdown.

The ‘?rsquo; part-number suffix indicates an operating temperature range of -20°C to +85°C. The ‘D?rsquo; suffix indicates a 38-lead TSSOP package. The initial ‘R?rsquo; variant suffix indicates tape and reel packing. The ‘’ final variant suffix indicates lead (Pb) free composition, with 100% matte tin leadframe plating.

A3932 Maximum Ratings

Drives wide range of N-channel MOSFETs
Synchronous rectification
Power MOSFET protection
Adjustable dead time for cross-conduction protection
100% duty cycle operation
Selectable fast or slow current-decay modes
Internal PWM peak current control
High-current gate drive
Motor lead short-to-ground protection
Internal 5 V regulator
Brake input
PWM torque-control input
Fault-diagnostic output
Tachometer output
Thermal shutdown
Undervoltage protection

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