A89332-1
A89332-1 is Three-Phase Sensorless Fan Controller manufactured by Allegro MicroSystems.
Features
AND BENEFITS
- Closed-loop speed control
- Fault mode brake
- AC Loss IBB control
- 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
- Overvoltage protection
- Shorted output protection (OCP)
APPLICATIONS
- High-speed 12 V server cooling fans
- Industrial and consumer blowers and fans
DESCRIPTION
The A89332-1 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 A89332-1 is available in a 26-contact 4 mm × 4 mm QFN with exposed power pad (suffix EX).
PACKAGE:
Not to scale
26-Contact QFN with exposed pad
(EX package)
0.1 µF X5R 25...
