SLYY235 June   2024 DRV7308

 

  1.   1
  2.   Overview
  3.   At a glance
  4.   How GaN increases inverter efficiency
  5.   Motor performance improvement with GaN power switches
  6.   Design considerations when using GaN in motor drives
  7.   Impact on system efficiency
  8.   Impact on audible noise
  9.   Conducted and radiated emission considerations
  10.   Impact on solution size
  11.   Protected and reliable system designs
  12.   Conclusion
  13.   Additional resources

Impact on solution size

Apart from the small package size and heat-sink removal, the DRV7308 offers high-level integration including an operational amplifier for motor current sensing, three comparators for current limiting, a temperature sensor and a suite of protective features These integrations enable an inverter board size reduction of as much as 55% compared to IGBT- or MOSFET-based solutions.

The size reduction also enables the integration of the inverter close to the motor, which is beneficial in use cases such as fans, blowers and pumps, and eliminates the need for cabling from the inverter board to the motor. The elimination of this cable also removes switching losses attributed to cable capacitance, and alleviates conducted and radiated EMI caused by long cables.