This solution is showing a motor control reference design for power tools. The power source (battery or main power supply) is not part of this proposal and is represented here as a simple battery pack.
For this reference design, Renesas choose a high voltage solution (48V), which features the high-performance Arm®-M4 based RA6M3 MCU. It has specific PWM timers for 3-phase motor control and a floating point unit (FPU) to enhance algorithm performance.
This block diagram shows a setup that includes an embedded power supply for the MCU (3.3V) and MOSFET half-bridge drivers (12V).
- These discrete solutions have an embedded LDO for the MCU power supply and are powered by the high motor voltage rail
- Although 3 parts are needed, overall board space is optimized because of the embedded LDO
|RA6M3||120MHz Arm® Cortex®-M4F core with USB High-Speed, Ethernet and TFT controller||Datasheet||Select Specific Device|
|HIP2103||60V, 1A/2A Peak, Half-Bridge Driver with 4V UVLO||Datasheet||Buy/Sample|
|HIP2104||60V, 1A/2A Peak, Half-Bridge Driver with 4V UVLO and Two Internal LDOs 12V and 3.3V||Datasheet||Buy/Sample|