Allegro MicroSystems A89332 3-Phase Sensorless Fan Controller
Allegro MicroSystems A89332 3-Phase Sensorless Fan Controller incorporates a sensorless sinusoidal drive to minimize vibration for high-power, 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 tailors the common 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 4mm × 4mm QFN package with an exposed power pad (suffix EX).
Features
- 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 components
- PWM duty cycle speed input
- FG speed output
- Lock detection
- Soft start
- Shorted output protection (overcurrent protection)
- 26-contact QFN with exposed pad (EX package)
- Lead-free
Applications
- High-speed 12V server cooling fans
- Industrial and consumer blowers and fans
Specifications
- -0.3V to 36V supply voltage range
- -0.3V to 36V control input range
- -0.3V to 6V logic input voltage range
- 18V logic output
- +55°C/W thermal resistance
- Temperatures
- +150°C junction
- -40°C to +105°C operating
- -55°C to +150°C storage
Typical Application Diagram
发布日期: 2022-05-26
| 更新日期: 2022-06-01