smallembedded

Refrigerator Damper and Fan Motor Control Solutions

TIDA-00297

Overview

Refrigerators often use dampers to control airflow and fans to provide air circulation. Discrete solutions have been used for years, but this TI design uses an integrated motor driver to provide easy control, high performance and complete protection. The DRV8848 drives the stepper motor damper, while the DRV10983 drives the BLDC fan with quiet 180° commutation. The BLDC even has closed-loop speed control when using the MSP430G2553 and the DRV8812 for PWM-based power supplies. The entire solution uses a single layer PCB. BLDC and stepper control example code is included in the MCU firmware. Overcurrent, overtemperature and undervoltage protection mechanisms are integrated in the DRV device.

characteristic

● Easily control stepper motor dampers and BLDC while achieving high performance and comprehensive protection.
● Single-layer PCB design, cost-effective.
● Example of full-step and half-step indexing for dampers.
● PCB layout accommodates a circular fan.
● 180° sensorless BLDC with ultra-low noise.
● BLDC can have closed-loop speed control function with minimal hardware modifications

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Design Files

Documentation

TIDA-00297 Test Results

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