10.8V/250W, 97% Efficient,Compact Brushless DC Motor Drive w/Stall Current Limit Reference Design TIDA-00771 (ACTIVE)

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Key Document

Description

The TIDA-00771 is a 20 A RMS drive for a three phase brushless DC (BLDC) motor in power tools operating from a 3-cell Li-ion battery with a voltage range of 5 V to 12.6 V. This design is a 45 x 50 mm compact drive implementing sensor-based trapezoidal control. The design uses a discrete, compact MOSFET-based three-phase inverter delivering 20 A RMS continuous (70 A peak for 1 second) winding current, without any external cooling or heat sink. The slew rate control and charge pump of the gate drive ensures maximum inverter efficiency (>97% at 10.8V DC) from 5 V to 12.6 V and optimum EMI performance. The cycle-by-cycle overcurrent protection feature protects the power stage from large stall currents and the board can work up to 55°C ambient. The small form factor enables placement of board close to the battery pack, high efficiency brings more battery duration and the 70 A peak current capability provides high momentary peak torque in power tools.

Features
  • Operates at Voltage Ranging from 5-V to 12.6-V (3-cell Li-ion Battery) with up to 20-ARMS Continuous (70A Peak for 1 Second) Winding Current Without Heat Sink or Airflow
  • Small PCB Form Factor of 45mm x 50mm
  • Optimum Inverter Efficiency (>97% at 10.8 V) from 5 V to 12.6 V and EMI Performance Using the Slew Rate Control and Charge Pump Feature of the Gate Driver
  • Cycle–by-Cycle Overcurrent Protection with <1us Response Time and Short Circuit Latch Protection by VDS Sensing
  • Shoot-through, Under Voltage, Over Temperature and Blocked Rotor Protection

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17576Q5B  CSD17576Q5B, 30-V N-Cannel NexFET™ Power MOSFET   MOSFETs  Sample & Buy Not Available
DRV8305  Three phase gate driver with three integrated 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
MSP430G2553  MSP430G2x53, MSP430G2x13 Mixed Signal Microcontroller  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC126A  Quadruple Bus Buffer Gate With 3-State Outputs  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TPD1E10B06  Single-channel ESD in 0402 package with 10pF capacitance and 6V breakdown  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
DRV8305 Download Download
LMT87 Download Download
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MSP430G2553 Download
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SN74LVC126A Download Download
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TPD1E10B06 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 6056 29 Apr 2016
Design files (5)
Title Type Size (KB) Date
ZIP 261 29 Mar 2016
PDF 2015 29 Mar 2016
ZIP 165 29 Mar 2016
PDF 56 29 Mar 2016
PDF 797 29 Mar 2016
Related Tools & Software

Software (1)



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