Intelligent Mobile Power Bank Sustaining Technology
Yes, I have encountered this situation where the USB mobile power supply keeps shutting down due to low current consumption when powering a project. This is a frustrating problem, as these mobile power supplies usually have overcurrent protection mechanisms that automatically shut down when detecting low current consumption.
To solve this problem, I designed a pulse-adjustable constant current source module based on a microcontroller, operational amplifier, MOSFET, and other components. This module can be connected to USB 3 directly, providing a stable current output and avoiding the mobile power supply shutdown issue.
The working principle of this module is to use the microcontroller to monitor current consumption and adjust the output current accordingly. The operational amplifier amplifies the current signal, while the MOSFET acts as a current switch to control the output current. By doing so, we can create an adjustable constant current source that meets the project’s current requirements while avoiding the mobile power supply shutdown issue.
The design of this module is very convenient, using a convenient USB interface that is easy to integrate with…