In fan applications, motor noise, vibration, and speed-control flexibility directly affect the user experience. Traditional Hall-effect solutions have relatively high cost and suffer from issues such as complex wiring and temperature-sensitive components. Relmon Technology’s MS39569 is a three-phase sensorless sinusoidal BLDC motor driver IC with integrated closed-loop speed control. It supports PWM/analog dual speed control and EEPROM speed-curve configuration, providing a low-noise, low-vibration, and highly flexible speed-control motor drive solution for white-goods fans and various consumer products.
Product Highlights
01 Sensorless Sinusoidal Drive for Low Noise and Low Vibration
The integrated sensorless sinusoidal drive enables precise commutation without Hall sensors, effectively reducing fan vibration and noise, improving the user experience, and reducing system BOM cost.
02 Closed-Loop Speed Control, EEPROM-Configurable
The built-in flexible closed-loop speed control system allows fan speed curves to be customized for the application via on-chip EEPROM. After configuration, the IC can operate independently without continuous MCU intervention, simplifying system design.
03 PWM/Analog Dual Speed Control for Flexible Adaptation
It supports both PWM and analog voltage speed-control modes. The SPDIN pin supports a wide range of speed-control signal inputs, making it compatible with various MCUs or external control signals.
04 Integrated LDO and Multiple Protections
The on-chip 3.3 V/20 mA LDO can supply power to peripheral circuits. Built-in overcurrent protection, overtemperature protection, stall detection, and soft-start functions ensure stable and reliable operation of the motor and IC.
05 Low-Power Mode and Wide Temperature Range
It supports sleep mode with sleep current as low as 100 µA. Operating voltage: 4 V to 16 V; operating temperature: -40°C to +125°C, suitable for various power supply schemes and harsh operating environments.
Technical Specifications
| Key Parameter | Performance Specification |
|---|---|
| Voltage Range (V) | 4–16 |
| Maximum Continuous Current (A) | 2 |
| Maximum Instantaneous Current (A) | 2.6 |
| On-Resistance (mΩ) | 360 |
| Control Mode | PWM/VSP/I²C |
| Control Interface | HW (GPIO) |
| Operating Temperature (°C) | -40 to 125 |
| Package | eSOP8 |
Application Scenarios
White-Goods Fans
In white-goods products such as pedestal fans, air circulator fans, and air purifiers, MS39569’s sensorless sinusoidal drive effectively reduces operating noise and vibration. The EEPROM-configurable speed curve enables smooth speed adjustment at different fan levels; PWM/analog dual speed control adapts to different main control solutions; the integrated LDO and FG speed output further simplify system design.
With features including sensorless sinusoidal drive, closed-loop speed control, EEPROM configurability, and PWM/analog dual speed control, MS39569 provides a low-noise, highly flexible BLDC motor drive solution for white-goods fans and consumer products.
.jpg)
.jpg)
.jpg)