I’ve designed yet another custom PCB with RP2350A, which is the core IC of Raspberry Pico 2. This board was special because it’s having high-voltage from main line on a single board. I’ve designed several products with AC or higher voltage rails on a single PCB, however, those were mostly having STM32 or other types of microcontrollers. This board design was my first try to use RP2350A on such high-voltage PCB for the first time.
Key Features
- RP2350A
- SPI Touch LCD interface, compatible with most ILI9341 or ST7789 display panels
- Analog frontend for pressure sensor
- 2 x Mechanical relays for motor and solenoid control
- 12W AC-DC module for 85V ~ 265V AC input
- Texas Instruments TPSM33625 for 5V step-down converter
- Texas Instruments TPS82084 for 3.3V step-down converter
PCB Design
The PCB design didn’t difficult too much. I took care of high voltage section to have fair clearance between traces and coppers.
PCBA Prototyping
While designing the board, I used all components that are well available on JLCPCB / LCSC. Hence, my client was able to get this board assembled without much trouble.
The board passed all functional tests well.
