Breadboard-pd
Made by junghoon-lee / Displays / Retro Tech
About the project
Dual rail USB-PD breadboard power supply
Project info
Difficulty: Moderate
Platforms: Texas Instruments, JLCPCB
Estimated time: 1 week
License: GNU General Public License, version 3 or later (GPL3+)
Items used in this project
Story
Dual rail USB-PD breadboard power supply with a voltage display CH1: 5V,9V,12V,15V,20V/5A | CH2: 3.3V,5V/3A (Max power 100W)
Voltage is selected by 4 DIP switches. 1,2,3 for channel 1 and 4 for channel 2. It has a 0.28 Inch voltage display, able to monitor the bus voltage real time, LMR33630 synchronous buck converter with low output ripple and high efficiency.
Dual supply rails are useful when powering circuits that uses a high power load like an actuator and a MCU.
Details
- Load, Ripple, Thermal Testing -
Testing the CH1, CH2 output ripple with load and thermal performance.
Each load test lasted 30 minutes.
CH2 buck converter output ripple without load (Vpp: 36mV)
- CH1: 20V/5A (100W)
The USB-C connector and PCB was under 50C
- CH2: 3.3V/3A (9.9W)
With load: Vpp 60mV
Hot Spot: 65.2C
- CH2: 5V/3A (15W)
With load: Vpp 72mV
Hot Spot: 68.8C
Credits
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