Refrigerator Damper and Fan Motor Control Solutions


Design files


Refrigerators often use a damper to control airflow and a fan to provide circulation.  While discrete solutions have been used for years, this reference design uses integrated motor drivers that provide easy control, high performance and full protection.  DRV8848 drives the stepper motor damper and DRV10983 drives the BLDC fan with quiet 180° commutation.  The BLDC has closed-loop speed control, using MSP430G2553 and DRV8812 for a PWM-based power supply.  The design uses a single-layer PCB.  BLDC and stepper control example code is provided in the MCU firmware.  Protection from over-current, over-temperature and under-voltage are all integrated in the DRV devices.

  • Easy control of the stepper-motor damper and BLDC along with high performance and full protection
  • Single-layer PCB design for cost efficiency
  • Full-step and half-step indexing examples for the damper
  • PCB layout accommodates a circular fan
  • 180° sensorless BLDC control with ultra-low acoustic noise
  • BLDC has closed-loop speed control with minimal hardware changes
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU669.PDF (1275 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRC08.PDF (286 K)

Detailed schematic diagram for design layout and components

TIDRC09.PDF (120 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC790.ZIP (419 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

Integrated control BLDC drivers

DRV1098324-V nominal, 3-A peak sensorless sinusoidal control 3-phase BLDC motor driver

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430G255316 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer

Data sheet: PDF
Stepper motor drivers

DRV881245-V, 1.6-A bipolar stepper or dual H-bridge motor driver with current regulation

Data sheet: PDF | HTML
Stepper motor drivers

DRV884818-V, 2-A dual H-bridge motor driver with current regulation

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
Test report TIDA-00297 Test Results Dec. 02, 2014

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