I am using a DFR0446 which uses a MP2636 battery management IC. It can charge the battery and boost the battery voltage to 5vdc output.
When it is powered by a battery the battery boost is always on, but i would like to disable the boost when I am not using the output. I would also like to add a soft latch momentary switch that I can use to power the system output from a digital output pin on an Arduino.
I cannot find any example circuits or diagrams. Does anyone have any references or ideas?
A P-channel MOSFET and a soft latch momentary switch are added to the DFR0446 module in order to disable the boost mode and control system output from an Arduino digital pin. Attach the MOSFET’s source to the battery’s positive terminal, its drain to the MP2636’s VOUT pin, and its gate to an Arduino digital output pin. For soft latching, connect a momentary switch and a flip-flop. To monitor the status, connect the flip-flop’s Q output to the digital input pin on the Arduino. Through the use of a digital input pin, the Arduino can read the flip-flop’s Q output and keep track of the system’s status.
