I have a 3S LiIon battery pack, so ~12V, connected to an MPM3610 buck converter to produce 5V for an ESP32S3 DevKit C-1. I need to also have a USB cable (with 5V) attached to the ESP32S3 for programming. Is this circuit adequate for having the 5V from the battery connected to the ESP32S3 AND the USB cable attached to the ESP32S3? The battery should provide all the 5V for the components on the board that need 5V. The USB 5V is just an unused feature of the USB connection for programming and serial terminal.
The reason I ask, is I have 2 flavors of boards (A and B), each with the identical circuits as shown here for the battery/MPM3610/ESP32S3. I was working with one of the A boards programming the ESP32S, so both USB and battery connected, and the MPM3610 does not product 5V with or without the USB cable attached. I did not test it before I plugged in the cable. I tried one of the B boards and just plugged in the battery, and the 5V is working. I don't want to plug in the USB cable to program the ESP32S3 on the B board until I am sure I am not going to blow out the MPM3610. Since the circuits on the two boards are identical, I think they should work on both boards.
I powered on another type A board without attaching the USB cable to the processor, and the MPM3610 worked and produced 5V. I am more confident that the MPM3610 circuit is working, as it produced 5V from 12V battery input without ever attaching the USB 5V to the board. How did I blow up the MPM3610 on the first type A board I brought up and programmed with the USB cable attached? I have attached my MPM3610 schematic. BTW, the boards were made by JLCPCB.
