Austin, Tex.—Freescale Semiconductor's stand alone MC34929 is suited to driving small three-phase brushless DC (BLDC) motors in consumer, portable and office equipment.
The MC34929, working from an 8- to 28-volt supply, provides up to 1 amp continuous. Designed with a built-in three-phase Hall-effect sensor interface and its supply, the MC34929 directs BLDC motors autonomously from a pushbutton or switch interface. Alternatively, users have provision for control by an external microcontroller (MCU) such as the company's 8-bit MC9S08QG8CDTE MCU. The chip's state machine accommodates several modes of operation, including clockwise, counterclockwise, run/stop, brake, variable speed and torque current limit.
The MC34929 includes built-in stall detection and protection circuitry, logic level control and various configuration and communication features for active monitoring of operation and increased reliability.
Click here for the product datasheet. The MC34929, in a 4-by-4 mm QFN package, is priced at $1.42 each in 10k pieces. Evaluation boards are available now for a suggested resale price of $90 (USD). The KIT34929EGEVBE development tool incorporates digital I/O, making it easy to use with an MCU in a closed-loop motor control system.
Freescale Semiconductor, 1-800-521-6274, www.freescale.com
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