A89332 Datasheet | Allegro MicroSystems

Features AND BENEFITS - Closed-loop speed control - Power loss brake - Fault mode brake - Configurable rotor detect (RD) or frequency generator (FG) output - Speed curve configuration via EEPROM - I2C serial port - Sinusoidal modulation for reduced audible noise and low vibration - Sensorless (no Hall sensors required) - Trapezoidal drive option for high speed - Adjustable gate drive option - Minimal external ponents - PWM duty cycle speed input - FG speed output - Lock detection - Soft start - Shorted output protection (overcurrent protection, OCP) APPLICATIONS - High-speed 12 V server cooling fans - Industrial and consumer blowers and fans DESCRIPTION The A89332 three-phase motor controller incorporates a sensorless sinusoidal drive to minimize vibration for highpower, high-speed server fans. Sensorless control eliminates the requirement for Hall sensors for server fan applications. A flexible, closed-loop speed control system is integrated into the IC. An EEPROM is used to tailor the mon functions of the fan speed curve to a specific application. This eliminates the requirement for a microprocessor-based system and minimizes programming requirements. The A89332 is available in a 4 × 4 QFN with exposed power pad (suffix EX). PACKAGE: Not to scale 26-Contact QFN with exposed pad (EX package) 0.1 µF × 5R 10V CP1 CP2 VIN...