Electronics and Semiconductors

New Automotive Sinusoidal Sensorless BLDC Fan Driver IC from Allegro MicroSystems Europe

15 March 2018

Allegro MicroSystems, LLC announces a new sensorless BLDC controller that is the most advanced solution on Source: Allegro MicroSystemsSource: Allegro MicroSystemsthe market today. Allegro’s automotive version of the A5932 is a three-phase BLDC motor controller solution that is targeted at high-power automotive fan applications with very low vibration and audible noise requirements. MOSFET gate driver outputs permit motor currents that can be scaled to fit the application requirements. A user friendly GUI interface means fast evaluation and a shorter time to market. Key automotive applications include seat, battery, infotainment and headlamp cooling fans.

The motor speed is controlled by applying a duty cycle command to the speed (SPD) input. The SPD input is allowed to operate over a wide frequency range. A sinusoidal voltage profile is applied to the windings of the motor at startup to quietly start up and gradually ramp up the motor to the desired speed. This new device has a 5.5 to 50 input voltage rating with an operating range of minus 40 degrees Celsius to 150 degrees Celsius.

The A5932 is available in a 24-contact 4 mm × 4 mm QFN with exposed thermal pad (suffix ES), and a 24-lead TSSOP with exposed thermal pad (suffix LP). The QFN package is supplied in a wettable flank allowing visual PCB solder inspection. These packages are lead (Pb) free, with 100 percent matte-tin lead frame plating.

Download a copy of the A5932 three-phase BLDC motor controller datasheet.

To contact the author of this article, email shimmelstein@globalspec.com


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