Disable pHAT DAC



I’m working in a project, and I need to disable the pHAT DAC few hours every day. What would be the better way of doing it? Is it possible without reboot?

Basically, I have a speaker connected - at the same time - to the audio output, and an USB port (for charging) , but it makes a lot of noise. Disabling temporary the pHAT DAC I can charge the speaker without making a lot of noise.