This reference design demonstrates a 600W power stage to drive a three-phase brushless DC (BLDC) motor for wireless tools powered by a 5-cell lithium-ion battery with a voltage of up to 21V. The design is a compact 60mm x 60mm driver that provides 33arms of continuous current at a switching frequency of 20kHz without the need for a heat sink (utilizing natural convection), enabling sensor-based trapezoidal control. The design demonstrates the operation of the MOSFET in a safe operating area with enhanced protection features including MOSFET overcurrent and breakdown protection with VDS monitoring, and switching voltage spike optimization with slew rate control and overtemperature protection.
600W driver for BLDC motors with sensor-based trapezoidal control.
The PCB has a small form factor: 60mm to 60mm
The operating voltage range is 5V to 21V
Supports continuous winding currents up to 33arms.
High efficiency is achieved with 20kHz unipolar trapezoidal control at 18V and 600W.
Advanced custom control of BLDC drivers (<60V).
Wireless handheld gardening tools.
Cordless power tools.
Cordless vacuum cleaner.
Lawn mower. MSPM0G1507 — 80MHz ARM M0+ MCU with 128KB Flash, 32KB SRAM, 2x 12-bit 4MSPS ADCs, DAC, 3 COMPs, 3 op amps, MATHACL
DRV8328 — 60V 1000 2000mA three-phase gate driver.
CSD18510Q5B — Single, 096mV, N-channel NEXFET power MOSFET
TMP61 — K linear thermistor in 0805 and through-hole packages.
If you need data sheets, sample testing, procurement, BOM matching and other needs, **Customer Service WeChat: 13310830171.
Inverter