Three-phase sensorless
MS39569
Three-Phase Sensorless Motor Driver
Datasheet Download
Overview
The MS39569 is a three-phase motor driver that integrates sensorless sinusoidal drive, which minimizes fan vibration in most fan-drive applications. The sensorless control eliminates the need for Hall sensors in fan applications. The MS39569 supports a maximum continuous current of 2A (peak sinusoidal current during motor operation; actual current depends on ambient temperature, supply voltage, and PCB thermal design).
The MS39569 integrates a flexible closed-loop speed control system. The EEPROM allows the fan speed curve to be customized for specific applications, and after programming, the IC can operate independently without a microprocessor.
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Key Features
- ⚫Closed-loop speed control
- ⚫Speed curve configuration via EEPROM
- ⚫I²C communication interface
- ⚫Sinusoidal wave modulation for low noise and low vibration
- ⚫Sensorless (no Hall sensors required)
- ⚫LDO regulator: 3.3V/20mA
- ⚫Speed control modes including PWM control and analog voltage control
- ⚫FG speed output
- ⚫Lock detection
- ⚫Soft start
- ⚫Low-power mode
- ⚫Overcurrent and overtemperature protection
Key Features
Fan applications in white goods
Consumer products
