Need to use DC 24V to 5V not less than 2A step-down, using MP2482 switching regulator chip, the above circuit diagram, there is no 5V output after power-on, occasionally burn the chip, tried many times and did not find the reason, please Great God's guidance!
24V is provided by a lithium battery and will not fluctuate.
Stephon 發表於 July 21, 2020
The input voltage of the MP2482 switching regulator chip: 4～30V. It stands to reason that you should not burn the chip after powering on!
Generally, just connect a 104 capacitor to pin 2, I don't know why you connect a 1uF+100K resistor. For D, it is best to use two SS34s in parallel to share the power.
Michele 發表於 July 21, 2020
EN withstand voltage is 6V, EN should be connected to 3-terminal VCC in the schematic diagram.
Marquez 發表於 July 21, 2020
EN enable voltage is too high, use 3.3-5V, PG pin is pulled up and down with VCC, don't float, R2 is short-circuited, C2 is OK with 104.
