Software
Firmware
TIDA-00620
12- to 24-V, 27-A Brushed DC Motor Reference Design
TIDA-00620
Overview
Brushed motors are a relatively popular option for motor designs because of their low price and simple control scheme. A brushed motor has a wire-wound rotor and permanent magnet stator. The commutation of the motor is achieved using conductive rings that are connected to the rotor using brushes that scrape against the commutator rings. This allows the direction of current through the motor to change based on the orientation of the brushes and different commutation rings. Utilizing an H-Bridge allows for easy direction and speed control changes to be applied quickly and efficiently to the brushed DC motor. An electronic drive is required to control the motor currents in a brushed DC motor. The electronic drive circuit consists of a power stage with two-phase inverter meeting the required power capability, a microcontroller to implement the motor speed commands and fault handling, current sensing for motor startup / stall protection, gate driver for controlling the two-phase inverter, and a power supply for microcontroller and other low voltage devices.
Features
- 343 Watt RMS Power Stage with MSP430G2553 Control Scheme
- Tested to operate with 18 Volt External Battery
- Delivers up to 27.47 ARMS Continuous Motor Current with No External Heat Sinking or Air Flow Aids
- Dual Layer, Small PCB Form Factor of 76.3 mm by 38.1 mm
- Utilizes TI’s 60 V N-Channel NexFETs with an RDS of 1.8 mΩ Packaged In a SON 5-mm × 6-mm footprint
- User Configurable Gate Drive Current Allows for Ease in Adapting to Custom MOSFET Selection
Industrial
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.
TIDUAW3.PDF (3082 K)
Reference design overview and verified performance test data
TIDRI70.PDF (381 K)
Detailed schematic diagram for design layout and components
TIDRI71.PDF (212 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRI72.PDF (154 K)
Detailed overview of design layout for component placement
TIDRI74.ZIP (863 K)
Files used for 3D models or 2D drawings of IC components
TIDCB82.ZIP (988 K)
Design file that contains information on physical board layer of design PCB
TIDRI73.PDF (1053 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MOSFETs
CSD18540Q5B — 60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 2.2 mOhm
Data sheet: PDF | HTMLMSP430 microcontrollers
MSP430G2553 — 16 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer
Data sheet: PDFStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | TIDA-00620 Test Results | Oct. 12, 2015 |
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