Available from Allegro Microsystems Europe is a new product evaluation kit to design the company's A4915 3-phase MOSFET controller IC. The evaluation kit consists of a printed-circuit board containing everything required to spin and control a brushless DC (BLDC) motor. All the user has to do is provide a voltage supply and the motor itself. The A4915 incorporates on-chip Hall commutation and a unique speed control input, which takes an analogue voltage and generates a pulse-width-modulated (PWM) output with a variable duty-cycle. This arrangement makes it possible to efficiently control a BLDC motor with little or no microprocessing power, resulting in a 75% reduction in PCB space compared with alternative solutions on the market.
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