This is a pocket-sized, IoT-ed Power Supply.
It's final goal is to meet EEers' daily usage requirements:
- Small Sized
- Programmable Voltage and Current settings
- High Efficiency
- High Reliability
- High precision
- Multiple control method
- Modernized GUI
This project is still under development and test.
| Design Requirements | Calculated Value |
|---|---|
| Input Voltage Range | 20V ~ 24V |
| Output Range | 0.8V(Minimal) ~ 24V |
| Load Current | 0 ~ 4A(0-12V),0 ~ 2A(12-24V) |
| Switching Frequency | about 300KHz |
| Mode | CCM & Hiccup On |
Finally get Rt = 84.5kΩ and we select standard value, that is 82kΩ.
In most cases, circuit works in BUCK mode, so choose a most-common used voltage range, and calculate its L, finally we get L is about 10uH.
And the maximum average inductor current occurs at the minimum input and maximum load current:
And Saturation current should be higher, about 1.5xIL, about 20A.
Finally we choose two 1265 4.7uH in series.
Please refer to ti's docs