Software
Firmware
TIDA-010056
54-V, 1.5 kW, >99% Efficient, 70x69 mm2 power stage reference design for 3-phase BLDC drives
TIDA-010056
Overview
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
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUEQ9A.PDF (8984 K)
Reference design overview and verified performance test data
TIDRZV0.PDF (443 K)
Detailed schematic diagram for design layout and components
TIDRZV1.PDF (299 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRZV2.PDF (295 K)
Detailed overview of design layout for component placement
TIDRZV4.ZIP (4526 K)
Files used for 3D models or 2D drawings of IC components
TIDCFI2.ZIP (409 K)
Design file that contains information on physical board layer of design PCB
TIDRZV3.PDF (1816 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
MOSFETs
CSD19536KTT — 100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm
Data sheet: PDF | HTMLMSP430 microcontrollers
MSP430FR2355 — 24-MHz 105-C integrated analog microcontroller with 32-KB FRAM, Op-Amps/PGAs, 12-bit DACs, 12-bit AD
Data sheet: PDFStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 54-V, 1.5 kW, >99% Efficient, 70x69 mm^2 Power Stage Reference Design (Rev. A) | Jul. 31, 2019 |
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