Cx31993 Datasheet Fix - Hot

The CX31993 has become a darling in the mobile audiophile world. For less than $10, this tiny USB-C DAC chip delivers surprisingly high-fidelity audio—supporting PCM up to 384kHz and DSD256. It rivals dongles costing five times as much.

The answer lies in the . The CX31993 contains an integrated headphone amplifier . The datasheet specifies that the chip can drive loads down to 16 Ohms. When you plug in high-sensitivity IEMs (like the Moondrop Chu or 7Hz Zero), the amp section works fine. cx31993 datasheet fix hot

| Symptom | Likely Cause | Fix | | :--- | :--- | :--- | | Hot at idle | Bad EEPROM/Standby mode disabled | Return for refund | | Hot only with low-ohm IEMs | Amp current overload | Use 75-ohm adapter | | Hot on PC but not on phone | USB port supplying >5.2V | Use a powered USB hub | | Case is hot, but chip is fine | Poor thermal conductivity between chip and case | Open case + thermal pad | | Intermittent cutting out | Thermal shutdown | Undervolt via software limiter | The CX31993 is incredible if you manage its thermal envelope. For reference, its competitor—the ALC5686—runs 10°C cooler but has worse THD+N. The CX31993 has become a darling in the