18V/1kW, 160A Peak, >98% Efficient, High Power Density Brushless Motor Drive Reference Design
TIDA-00774
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Key Document

Description

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

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD88584Q5DC  40V, Nch synchronous buck NexFET MOSFET™, SON5x6 dualCool PowerBlock, 50A  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
DRV8323  60V Three-Phase Smart Gate Driver With Three Current Shunt Amplifiers  Motor drivers  Sample & Buy View Design Kits & Evaluation Modules
LMT87  2.7V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
MSP430F5132  25MHz MCU with Two 16-bit High Res Timers, 8KB flash, 1KB RAM, 10-bit ADC, 16-channel Comparator  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules
TPS54061  4.7V to 60V Input, 200mA Synchronous Step-Down Converter with Low IQ  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD88584Q5DC VSON-CLIP (DMM)| 22 Download Download
DRV8323 Download Download
LMT87 Download Download
Download
Download
MSP430F5132 Download -
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TPS54061 Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 6329 09 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 306 11 May 2017
ZIP 3026 11 May 2017
PDF 2091 11 May 2017
PDF 261 11 May 2017
PDF 60 11 May 2017
PDF 1270 11 May 2017
Related Tools & Software

Software (1)



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