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I have to develop a driver for a 3 phase brushless DC motor @ 24V with max current per phase of 5A. I want to use an Arduino Zero for testing.

My idea is to use the Allegro A4963 IC. This is my first attempt with 3Phase motors. For what I understand the IC needs only a PWM signal and then it does itself the commutation of the 3 P-MOS and 3 N-MOS, right? Thanks

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  • \$\begingroup\$ And the link to the data sheets for the chip and motor ...? \$\endgroup\$ – Transistor Jun 16 '17 at 12:45
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You will also need to configure the part using an SPI interface from your processor and a sense resistor to sense the current. The parts are very easy to use. I would recommend the eval board - it will run most motors out of the box and they provide a PC interface to try different configurations.

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  • \$\begingroup\$ Yes, I will try the evaluation board. With this IC the waveform of the phase will be trapezoidal; what if I would use a sinusoidal drive? Is there an IC similar to this? Or do I have to commutate the 6 Mosfet directly with the mcu ( and a pre-driver ) ? \$\endgroup\$ – EnricoPallazzo Jun 16 '17 at 14:01
  • \$\begingroup\$ I don't have direct experience with the TI parts. They make a family of sensorless sinusoidal drivers. Let me know if you try one! The Allegro part has a PWM input but I don't use it. \$\endgroup\$ – John Birckhead Jun 16 '17 at 15:10

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