18V/1kW, 160A Peak, >98% Efficient, High Power Density Brushless Motor Drive Reference Design
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.
- 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
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Download ready-to-use system files to speed your design process.
Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
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|*||Design guide||18V/1kW, 120APEAK, 98.5 % Efficient, Compact Brushless Motor Drive Design Guide||PDF | HTML||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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