Cx31993 Datasheet Fix Hot

If you own a pre-built dongle (like the Abigail, JCALLY, or similar CX31993 sticks) that gets hot, you can improve its heat dissipation by linking the chip directly to its aluminum shell.

The DAC chip is a common budget-friendly component often paired with the MAX97220 amplifier in portable USB-C dongles. While a formal, public "datasheet" from the manufacturer (Conexant/Synaptics) is notoriously difficult to find, community documentation and real-world testing highlight a recurring issue where these devices run excessively hot and produce static. Why it gets "Hot"

Do this if VBUS > 4.2V. Remove any existing shunt resistor or cheap linear "regulator."

is a popular budget USB-C DAC known for high-resolution 32-bit/384kHz audio support and a great signal-to-noise ratio (SNR >128dB). However, many users report that dongles using this chip—often paired with the amplifier—can get surprisingly hot during use. Why Your CX31993 Dongle Gets Hot cx31993 datasheet fix hot

Buy a 3.5mm female-to-male adapter and solder a 75Ω, 1% metal film resistor in series with the tip (left) and ring (right) channels.

Fix 2: Optimize the PCB Ground Plane (For DIY Builders & Designers)

With a 65mW output capacity, this DAC pushes more power than standard, passive, or low-end USB-C adapters. Practical Fixes: CX31993 Hot Issues If you own a pre-built dongle (like the

If you don't want to solder, replace your dongle. Not all CX31993 devices are created equal.

The CX31993 is a highly popular, budget-friendly USB-C DAC (Digital-to-Analog Converter) chip found in dozens of portable headphone dongles. While it offers impressive 32-bit/384kHz audio performance for its price, many DIY audio enthusiasts and hardware modders notice a common issue: the chip can run surprisingly hot during extended playback.

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 Why it gets "Hot" Do this if VBUS > 4

| Condition | Datasheet Spec | Defective Dongle | Fixed Dongle | | :--- | :--- | :--- | :--- | | Idle current (no playback) | <10 mA | 35-50 mA | 12-18 mA | | Load current (1kHz sine @ 0dB) | <80 mA | 150-200 mA | 85-95 mA | | Case temperature (30 min) | <45°C | 65-85°C | 41-48°C |

The 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.

You use high-impedance headphones (80-300 Ohm) or listen at low volumes.