Controller takes on motoring motors

An Allegro MicroSystems Europe product story

Edited by the Electronicstalk editorial team Sep 8, 2003

The new A3925 power MOSFET controller IC is designed for use in 42V automotive applications involving high-power motors.

The new A3925 power mosfet controller IC from Allegro MicroSystems is designed for use in 42V automotive applications involving high-power motors.

The new device provides six high-current gate-drive outputs capable of driving a wide range of power N-channel mosfets.

Bootstrap capacitors are utilised to provide a steady supply voltage over a varying battery input range - a key requirement in automotive systems.

Direct control of each gate output is possible via six TTL compatible inputs.

A differential amplifier with two sample-and-hold outputs is integrated to allow accurate measurement of the low-side current in a three-phase bridge.

Two diagnostic fault outputs can be continuously monitored to protect the driver from short circuits to battery or supply, bridge-open, all undervoltage conditions and thermal shutdown.

The device is supplied in a 36-pin QSOP or a 44-pin PLCC package.

Operating ambient temperature range is -40 to +135C.