3-phase gate driver for EV and hybrid cars

October 27, 2021 // By Jean-Pierre Joosting
3-phase gate driver for EV and hybrid cars
Latest gate driver IC keeps batteries and HVAC systems running quiet and cool as EV and hybrid car drivers become more sensitive to noise.

Allegro MicroSystems is expanding its QuietMotion™ product line with the introduction of the new A89307 automotive-qualified gate driver IC. Designed for battery cooling fans and HVAC systems in electric (EV) and hybrid vehicles, the A89307 offers ultra-low noise and vibration by using a Field Oriented Control (FOC) algorithm to drive continuous sinusoidal current to the load, helping automakers reduce noise and improve battery life, offering more miles per charge and lowering vehicle carbon footprints.

“By design, EV and hybrid vehicles are quieter than traditional models with internal combustion engines — especially when they’re stopped — and drivers are becoming increasingly sensitive to noise created by components such as cooling fans,” said Steve Lutz, Product Line Director for Motor Drivers at Allegro. “The A89307’s hardware-based algorithm makes it easier for designers to reduce fan noise while improving cooling performance and increasing miles per charge. That’s good for drivers, and good for the environment.”

The A89307 gate driver IC includes a hardware-based algorithm, which requires no external sensors or software development — the user simply selects parameters using a simple GUI interface and loads them into the IC’s on-chip EEPROM. With only five external components, the A89307 helps designers lower material costs by reducing BOM components and facilitating very small system footprints for in-motor PCBs. Its fully integrated algorithm can even eliminate the need for a separate microprocessor.

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