Ensure your host device cuts power to the DAC when no audio is playing.
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).
Integrated 32-bit/384kHz DAC and Class G headphone amplifier. cx31993 datasheet fix hot
Before reaching for a soldering iron, confirm the cause.
Use a plastic pry tool or heat gun (on low setting) to soften any glue and slide the internal PCB out of its metal casing. Ensure your host device cuts power to the
Which (Windows, Android, iOS) are you using with the DAC?
Mismatch between datasheet thermal metrics and real usage Fix: Recompute worst-case power dissipation for your exact workload and ensure junction temp stays below max; add margin for reliability. Integrated 32-bit/384kHz DAC and Class G headphone amplifier
Also, attempt to fix the chip if your dongle is a known good design (e.g., AudioQuest DragonFly Cobalt uses a similar but different chip). Always verify the actual component marking – some "CX31993" clones have different thermal characteristics.
Many cheap dongles come in plastic casings. Plastic is an insulator. If your chip runs hot:
Simple changes to your listening habits can also make a big difference:
Ensure the dongle is in a well-ventilated area; avoid leaving it tucked under a laptop or in a pocket while in use. 3. The "Datasheet" Mystery Finding an official datasheet for the