TIDA-00774
18V/1kW, 160A Peak, >98% Efficient, High Power Density Brushless Motor Drive Reference Design
TIDA-00774
Overview
The TIDA-00774 is a 1kW drive for a three-phase brushless DC (BLDC) motor in power tools operating from a 5-cell Li-ion battery with a voltage up to 21 V. The design is a 65mm x 60mm compact drive, implementing sensor-based trapezoidal control. The design takes advantage of TI's MOSFET Power Block technology, which integrates two FETs in half-bridge configuration into a single SON 5x6 package, enabling very high power density. The design uses two Power Blocks in parallel and delivers 50-ARMS continuous (120-A peak for 3 second, 160-A peak for 1 second) winding current. The MOSFET power block with minimum parasitic inductance and the current controlled gate driver with slew rate control helps in effective MOSFET paralleling and reduces switching spikes. The current sensing is done by monitoring MOSFET VDS. The board provides cycle by cycle over current and short circuit protection.
Features
- Operates at voltage ranging from 6-V to 21-V (5s li-ion battery) delivering 50-ARMS continuous (120A peak for 3s, 160-A peak for 1s) winding current
- Inverter drive efficiency > 98.5%
- Current sensing by monitoring and amplifying the VDS of MOSFET
- Effective MOSFET paralleling with excellent dynamic current sharing
- 18V/680W, 33 A RMS support without heat sink
- Cycle-by-cycle overcurrent and short circuit protection by VDS sensing
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUCL0.PDF (6329 K)
Reference design overview and verified performance test data
TIDRQT8.PDF (1270 K)
Detailed schematic diagram for design layout and components
TIDRQT9.PDF (60 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRQU0.PDF (261 K)
Detailed overview of design layout for component placement
TIDRQU2.ZIP (3026 K)
Files used for 3D models or 2D drawings of IC components
TIDCDE6.ZIP (306 K)
Design file that contains information on physical board layer of design PCB
TIDRQU1.PDF (2091 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
Analog temperature sensors
LMT87 — ±2°C 2.7V to 5.5V analog output temperature sensor with -13.6 mV/°C gain
Data sheetBrushless DC (BLDC) motor drivers
DRV8323 — 65-V max 3-phase smart gate driver with current shunt amplifiers
Data sheetBuck converters (integrated switch)
TPS54061 — 4.7V to 60V Input, 200mA Synchronous Step-Down Converter with Low IQ
Data sheetMSP430 microcontrollers
MSP430F5132 — 25 MHz MCU with 8KB Flash, 1KB SRAM, 10-bit ADC, comparator, DMA, 16-bit High Resolution timer
Data sheetPower blocks
CSD88584Q5DC — 40-V, N channel synchronous buck NexFET™ power MOSFET, SON 5 mm x 6 mm Dual-Cool™ power block, 50 A
Data sheetStart development
Technical documentation
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| Type | Title | Date | |
|---|---|---|---|
| * | Design guide | 18V/1kW, 120APEAK, 98.5 % Efficient, Compact Brushless Motor Drive Design Guide | Nov. 09, 2016 |
| Technical article | Demand for higher power density drives innovative power tool solution | May 23, 2017 | |
| More literature | TIDA-00774 Firmware | May 11, 2017 |
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