Cx31993 Datasheet Fix Hot Updated

Here is the relevant technical post content usually associated with this search query:

Use a USB 2.0 Port: If using the dongle on a PC, try a USB 2.0 port instead of USB 3.0/3.1. Some users find that the lower power delivery of USB 2.0 helps the chip run cooler.

But when you plug in low-impedance, high-current headphones (32 Ohm or lower), or use a passive analog volume control (like a USB knob), the amplifier enters a Class A/B bias region where efficiency plummets. cx31993 datasheet fix hot

• Go to Control Panel > Power Options > Change Plan Settings > Change Advanced Power Settings > USB Settings > USB selective suspend setting.
• Set to Enabled. This forces the host PC to send suspend commands to the CX31993 when idle.
• Result: Cuts idle temperature by 40%.

Thermal math:
(5.25V – 3.3V) × 0.088A = 0.17W extra heat. In a QFN package (θja=52°C/W), that's a 9°C rise before considering any audio load.

Are you experiencing this on a specific device (phone vs. PC) or with a specific set of IEMs? Any link to the cx31993 datasheet? - Facebook Here is the relevant technical post content usually

Troubleshooting CX31993 USB-C DAC: Heat & Static Fixes Conexant (CX-Pro) CX31993

Conclusion: Respect the Datasheet

The CX31993 is a remarkably capable chip when treated correctly. Overheating is not a feature; it is a sign of cost-cutting by manufacturers who ignore the datasheet's power, layout, and termination requirements. By applying the fixes above—adding a proper LDO, Zobel networks, and thermal vias—you can transform a burning-hot dongle into a cool, high-fidelity audio interface that meets or exceeds its specifications. Go to Control Panel > Power Options >

and JCally models. While it offers high-resolution audio (32-bit/384kHz), it is frequently reported to run hot, especially when paired with a MAX97220 amplifier chip or used with a PC. Why the CX31993 Gets Hot High Power Draw: