GaN power module improves inverter efficiency

A 650-V GaN intelligent power module (IPM) from TI enables up to 99% inverter efficiency for major home appliances and HVAC systems. The DRV7308 IPM integrates 650-V, 205-mΩ e-mode GaN FETs in a half H-bridge configuration, capable of driving three-phase BLDC/PMSM motors with up to 450-V DC rails.

Worldwide efficiency standards for appliances and HVAC systems, such as SEER, MEPS, Energy Star, and Top Runner, are becoming increasingly stringent. TI reports that the DRV7308 helps engineers meet these standards by leveraging GaN technology to deliver enhanced efficiency and thermal performance, with 50% reduced power losses compared to existing solutions. It also achieves low dead time and low propagation delay, both less than 200 ns. This allows higher PWM switching frequencies, which reduce audible noise and system vibration.

Housed in a 12×12-mm, 60-pin QFN package, the DRV7308 is one of the industry’s smallest IPMs for motor drive applications ranging from 150 W to 250 W. Its high efficiency eliminates the need for an external heatsink, shrinking motor drive inverter PCB size by up to 55%. The integrated current sense amplifier, protection features, and inverter stage further reduce solution size and cost.

Preproduction quantities of the DRV7308 IPM are available for purchase on TI.com. Prices start at $5.50 each in lots of 1000 units. An evaluation module is also available for $250.

DRV7308 product page 

Texas Instruments  

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