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Allegro pre-driver IC targets industrial loads

Posted: 30 Jul 2003 ?? ?Print Version ?Bookmark and Share

Keywords:allegro microsystems? a3946? mosfet? pre-driver ic? abcd3 process?

Allegro MicroSystems Inc. has released the A3946 power-MOSFET pre-driver IC designed to drive brush dc motors, three-phase brushless dc motors (BLDC), switched reluctance motors, and other large inductive loads in automotive and industrial markets.

The driver IC also provides two high-current gate-drive outputs capable of driving a variety of n-channel MOSFETs. The two outputs are configured to drive a classic half-bridge, and an externally supplied PWM signal to the input of the product switches the high-side gate-driver output. The low-side gate-driver output can be configured to automatically switch on during the PWM off-time, thereby acting as a synchronous rectifier.

Manufactured using the company's ABCD3 (Allegro Bipolar CMOS DMOS 3G) process, the A3946 is supplied in a batwing 16-lead SOIC, has an operating voltage of 7V to 60V, and an operating temperature range of -40C to 135C.

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