3-Phase Gate Driver with Low-Speed Operation and Integrated FOC for Automotive Fans and Pumps

27 October 2021 - 0 Comments

A89307 Automotive-Qualified 3-Phase Gate Driver

Allegro MicroSystems has introduced a new A89307 automotive-qualified gate driver integrated circuit that offers ultra-low noise and vibration by using a Field Oriented Control (FOC) algorithm to drive continuous sinusoidal current to the load. This new gate driver is designed for battery cooling fans and HVAC systems in electric (EV) and hybrid vehicles and helps automakers to reduce noise and improve battery life. Moreover, with only five external components, this device decreases material costs by reducing BOM components and facilitating very small system footprints for in-motor PCBs.

This 3-phase, sensorless, brushless DC motor driver can operate from 5.5V to 50V and features an I2C interface for speed control and status readback. Modes of operation of this device include open-loop PWM or fully programmable closed-loop speed control. This gate driver also includes Low-speed operation and windmilling start-up to Improve reliability and reduce audible noise.

Features

Code-free sensorless field-oriented control (FOC) - No software programming
Ultra-quiet low-speed operation - Reduces audible noise and vibration
Proprietary non-reverse fast startup - Improves reliability and reduces audible noise
Analog, PWM, Analog, or Clock mode speed control with programmable speed profile
Configurable current limit and lock detection - Reduces motor heating
Start-up under both forward and reverse windmilling conditions - improves reliability
Short-circuit protection (OCP) - protects supply and PCB from burning during MOSFET failure