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54-V, 1.5 kW, >99% Efficient, 70x69 mm2 power stage reference design for 3-phase BLDC drives
TIDA-010056
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- 54-V, 1.5 kW, >99% Efficient, 70x69 mm^2 Power Stage Reference Design (Rev. A)
(PDF 8885 KB)
31 Jul 2019
Description
This reference design demonstrates a 1.5-kW power stage for driving a three-phase brushless DC motor in cordless tools operating from a 15-cell Li-ion battery with a voltage up to 63-V. The design is a 70mm x 69mm compact drive, bringing 25-ARMS continuous current at 20-kHz switching frequency without heat sink and with natural convection, implementing sensorbased trapezoidal control. The design achieves optimized MOSFET switching loss and EMI by using a smart gate driver with optimized MOSFET and PCB. The design shows MOSFET operation within the safe operating area using enhanced protections including MOSFET over current and shoot-through protection by VDS monitoring, gate protection, switching voltage spike optimization with slew rate control and over temperature protection.
Features
- Operates at voltage ranging from 9 V to 63 V (15s li-ion battery) delivering 25 ARMS continuous current, 400-A peak
- 54 V/1.5 kW, 25 ARMS support without heat sink in a small 70mm x 69mm PCB form factor
- More than 99% efficiency at 20 kHz trapezoidal control for 54 V/1.5 kW
- MOSFET over current protection by VDS sensing with response time less than 1-µs with additional 4-µs deglitch time to eliminate false trips
- Enhanced protection at MOSFET gate including VGS under-voltage, over-voltage, gate to source short circuit and open circuit protections
See the Important Notice and Disclaimer covering reference designs and other TI resources.
