Powered by 18650, 3V~4.2V, it needs to be stabilized at 3.3V. However, when not in use, the microcontroller is always in a low-power state of 1uA current. However, the voltage regulator chip 1117 seem...
I am currently working on a power grid monitoring project. The power supply needs to convert AC220V to DC24V. Because it is installed on the 220V output side of the power grid transformer, it has high...
First, let’s look at the picture. The inductor is marked wrongly.For this design, the RMS inductor current is 3.003A, the peak value is 3.31A, L1=15μH is selected, the saturation current must be great...