Allegro MicroSystems, LLC introduced a new product evaluation kit for its A4915 three-phase MOSFET controller IC featuring an on-chip hall commutation and a unique speed control input. The speed input takes an analog voltage and generates pulse width modulated (PWM) output with variable duty cycle. This control interface combined with on-chip hall commutation makes it possible to efficiently control a BLDC motor with little or no micro processing power. This solution is said to reduce PCB space by 75 percent over existing competitive solutions. The A4915 evaluation kit is fully compliant to 50 V. Six all N-channel power MOSFETs are mounted on the evaluation kit and can supply 30 A peak and 20 A nominal run current at room temperature. If larger loads are needed the A4915 has jumpers that disable the onboard bridge and provide connections to add an external bridge. An onboard 5-V regulator creates the secondary supply for logic inputs.
Allegro MicroSystems, LLC, www.allegromicro.com