Three-phase inverter with smart gate driver for servo drives

21st January 2020
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Efficiency, protection, and integration are important design factors for compact DC-fed drives up to 60VDC. This reference design from Texas Instruments shows a three-phase inverter with nominal 48V DC input and a ten-ARMS output current.

The 100V intelligent three-phase gate driver DRV8350R with integrated buck converter and six 100V NexFET power MOSFETs with ultra-low gate charge enable high efficiency of the power stage.

Using the internal protection features of the DRV8350R, the power stage is protected against overtemperature, overcurrent, and short-circuit between the motor terminals and motor terminals to ground. Precision phase current sensing is achieved using the INA240.

The interface is a 3.3V I/O to connect a host MCU like the C2000 MCU for brushless AC motor control.

To learn more, click here.

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