What and headphones are you using with it? Share public link
If the dongle is hot and producing static with sensitive IEMs, the DAC might be working too hard on the high gain.
(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. cx31993 datasheet fix hot
If you’re seeing references to “CX31993 datasheet hot” it usually means one of three things: a thermal problem with the CX31993 device in your design, incorrect or unclear thermal information in the datasheet, or a search/SEO phrase pointing to a commonly-reported issue. This post explains likely causes, how to diagnose, and practical fixes.
If your CX31993 dongle is getting worryingly hot, or if you are designing a custom PCB using the CX31993 schematic, use these effective hardware fixes to manage the thermals. What and headphones are you using with it
First, identify whether the primary source of heat is the CX31993 chip itself or a secondary amplifier IC.
utilizes a Class G amplifier, which is efficient but requires managing power effectively when driving headphones. When playing high-resolution audio (32bit/384kHz) or driving low-impedance, power-hungry headphones, the chip pulls significant power, converting the excess into heat, especially in such a small enclosure. 2. Lack of Thermal Dissipation In a QFN package (θja=52°C/W), that's a 9°C
Insufficient copper area or poor thermal via design Fix: Add or enlarge a thermal pad and connect it to multiple thermal vias to internal ground/power planes; increase surrounding copper pour area to lower thetaJA.
According to various technical summaries, the chip delivers top-tier performance for its size: 32-bit / 384kHz (PCM) Signal-to-Noise Ratio (SNR): >128dB Dynamic Range (DNR): >120dB Total Harmonic Distortion (THD+N): 0.0003% (-95dB)
The CX31993 is a low-power, high-fidelity audio codec chip designed for USB Type-C connectivity. It is often referred to as a "Class G" headphone amplifier chip. Key Features from User-Engineered Data High SNR ( ) and low distortion.