18-V/400-W 98% Efficient Compact Brushless DC Motor Drive w/Stall Current Limit Reference Design

(ACTIVE) TIDA-00772

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Key Document

Description

The TIDA-00772 is a 18 A RMS 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. 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 18 A RMS continuous (60 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 (>98% at 18V DC) 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 flexible mounting of board, high efficiency brings more battery duration and the 60 A peak current capability provides high momentary peak torque in power tools.

Features
  • Operates at voltage from  5 V to 21 V (5-cell Li-ion battery) with up to 18-ARMS continuous (60A peak for 1 second) winding current without heat sink or airflow
  • Small PCB form factor of 45mm x 50mm
  • Optimum inverter efficiency (>98% at 18 V) and EMI performance by using low RDS_ON NexFETs and utilizing 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

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (6)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18502Q5B  40-V, N-Channel NexFET™ Power MOSFET  Power MOSFET  Sample & Buy Not Available
DRV8305  Three Phase Gate Driver with Three Integrated Current Shunt Amplifiers  Brushless DC (BLDC) 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/Transceiver  Sample & Buy Not Available
TPD1E10B06  Single-Channel ESD in 0402 Package With 10pF Capacitance and 6V Breakdown  Circuit Protection  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 11349 23 Aug 2016 2,249
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 333 09 Jun 2016 153
ZIP 2014 09 Jun 2016 72
PDF 2560 09 Jun 2016 76
PDF 311 09 Jun 2016 42
PDF 56 09 Jun 2016 62
PDF 1334 09 Jun 2016 294
Related Tools & Software

Reference Designs (1)

Software (1)




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