Sensorless BLDC Controller Improves Design Reliability

Sensorless BLDC Controller Improves Design Reliability
Allegro MicroSystems Inc.

The A4963 debuts as a three-phase, sensorless and brushless dc (BLDC) motor controller for use with external complementary P-channel and N-channel power MOSFETs. Reliable sensorless startup and run commutation can quickly be customized for individual motors and loads with adjustment of a few simple default parameters, saving time while improving design reliability. The device operates over a wide range of motor speeds from less than 100 rpm to in excess of 30,000 rpm, depending on the supply voltage and motor capability. Several operational modes are available including closed loop speed control, duty-cycle (voltage) control, and current (torque limit) control. Operating mode and control parameters can be altered through an SPI compatible serial interface or through adjustable default settings preloaded into the on-chip EEPROM memory. The A4963GLPTR-T comes in a 20-pin TSSOP with exposed thermal pad. Price is $1.72 each/1,000. A datasheet is available at

Allegro MicroSystems
Worcester, MA

Contact Info

Company: Allegro MicroSystems Inc.
Country: United States (USA)
Phone number: 508-853-5000
Fax: 508-853-7895

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