TIDA-00447

24V, 100W/30W Dual Sensorless Brushless DC Motor Drive Reference Design

TIDA-00447

Design files

Overview

TIDA-00447 is a 24V, dual Brushless DC (BLDC) motor drive reference design to be used in major home appliances to drive low voltage BLDC motors such as pumps and fans, e.g. for circulation pump and drain pump of dishwashers. The power stages of motor drive are designed for 100W and 30W of continuous operation respectively. The 30W drive is based on a single chip, low external component count three-phase motor driver with integrated power MOSFETs and offers proprietary sensorless control scheme to provide continuous sinusoidal drive. It also features an integrated buck/linear regulator to efficiently step down the supply voltage to either 5 or 3.3 V for powering both internal and external circuit. The 100W drive is implemented using discrete approach having an MCU, external MOSFET driver with protections & current sensing and external power MOSFETs. This architecture offers the flexibility to scale the drive power level as needed. The MCU is programmed with InstaSPIN-BLDC software that implements sensorless trapezoidal control of BLDC motor using back-EMF integration method and it is also used to configure & control the speed of drain pump stage. Isolated UART interface enables communication of the drive unit with the main user interface controller. This reference design is fully tested for full load operation, over current and motor stall protections.

Features
  • 24V dual brushless motor drive platform for major home appliances using devices with extensive built-in protection features enabling safer, noiseless operation and small form factor.
  • The lower powered motor drive is thermally designed for up to 30W continuous operation is based on a single chip, low external component count three-phase motor driver with integrated power MOSFETs and offers proprietary sensorless control scheme to provide continuous sinusoidal drive.
  • The lower powered motor drive controller integrates 5V/3.3V buck/linear converter and protection functions such as over current, voltage surge protection, UVLO protection and motor Lock detection.
  • The higher powered motor drive thermally designed 100W continuous operation is implemented using discrete approach having an MCU, external MOSFET driver with built-in protections & current sensing amplifier and external power MOSFETs.
  • The discrete implementation of water circulation pump offers flexibility of easily scaling up or scaling down the power level.
  • The MCU is programmed with InstaSPIN-BLDC software that implements sensorless trapezoidal control of BLDC motor using back-emf integration method offering robust low speed operation and finer control over the entire speed range.

Design files & products

Design files

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

TIDUA50B.PDF (5110 K)

Reference design overview and verified performance test data

TIDRFI0.PDF (758 K)

Detailed schematic diagram for design layout and components

TIDRFI1.PDF (209 K)

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

TIDRFI2.PDF (573 K)

Detailed overview of design layout for component placement

TIDRFI4.ZIP (666 K)

Files used for 3D models or 2D drawings of IC components

TIDCAI7.ZIP (84 K)

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

TIDRFI3.PDF (1545 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

N-channel MOSFETs

CSD88539ND60-V, N channel NexFET™ power MOSFET, dual SO-8, 28 mOhm

Data sheet document-pdfAcrobat PDF
Analog temperature sensors

LMT841.5V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92

Data sheet document-pdfAcrobat PDF open-in-new HTML
Brushless DC (BLDC) motor drivers

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

Data sheet document-pdfAcrobat PDF open-in-new HTML
Brushless DC (BLDC) motor drivers

DRV830365-V max 3-phase gate driver with current shunt amplifiers & SPI

Data sheet document-pdfAcrobat PDF open-in-new HTML
Digital isolators

ISO7421Dual-channel, 1/1, 1-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TPD4S009Quad 0.8-pF, 5.5-V, ±8-kV ESD protection diode with with VCC pin for High Speed Interfaces

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430G274416 MHz MCU with 32KB Flash, 1KB SRAM, 10-bit ADC, UART/SPI/I2C, timer

Data sheet document-pdfAcrobat PDF open-in-new HTML
Supervisor & reset ICs

TLV8033-pin voltage supervisor (reset IC) with active-low & open-drain reset

Data sheet document-pdfAcrobat PDF

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Software

Firmware

TIDA-00447 Firmware — TIDCBC1.ZIP (4237 K)

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Technical documentation

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Type Title Date
* Design guide 24-V DC, 100-W/30-W Dual Sensorless Brushless DC Motor Drive Reference Design (Rev. B) May 12, 2016
White paper Replacing single-phase ACIMs with three-phase BLDC motors saves energy Apr. 14, 2016
Technical article What happens when low-voltage BLDC motors drive appliance subsystems Mar. 17, 2016
More literature TIDA-00447 Firmware Oct. 30, 2015

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