The CX31993 has several power states: Sleep, Standby, and Active. A correct implementation uses the USB suspend signal to shut down the internal PLL (Phase-Locked Loop).
Remember: A warm DAC is a working DAC. A hot DAC is a poorly implemented one. Now you have the power to fix it. cx31993 datasheet fix hot
If the heat is accompanied by a loud static build-up, immediate unplugging is recommended, as this typically indicates a temporary hardware "lock-up" or thermal throttling. Technical Specs (Inferred) Decoding Up to 32-bit / 384kHz Amplifier Class G (often integrated or paired with MAX97220) SNR Reported around 128dB (chip spec, implementation varies) Power Consumption The CX31993 has several power states: Sleep, Standby,
amplifier) can get physically hot, especially when plugged into a PC USB port rather than a phone. Current Draw: A hot DAC is a poorly implemented one