Without these, engineers cannot properly “fix hot” at the design stage.
: Playing DSD files forces the chip to work much harder than standard PCM files, leading to significantly higher temperatures (up to 50°C). 3. Power & Connectivity Fixes Avoid Fast-Charging Pass-through
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. cx31993 datasheet fix hot
The datasheet currently lacks a power derating graph. A new graph must be added indicating that maximum power dissipation must be reduced linearly above an ambient temperature of 50°C to prevent junction temperatures exceeding 125°C.
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. Without these, engineers cannot properly “fix hot” at
Playing high-bitrate files like DSD can push the DAC to temperatures around The "Fix" (Community-Sourced)
The CX31993 ideally runs on 3.3V. A proper design uses a DC-DC buck converter (e.g., 5V→3.3V @ 85% efficiency). However, ultra-cheap dongles use a to drop 5V to 3.3V. The datasheet currently lacks a power derating graph
: Temporarily disabling "Bit-perfect" mode can sometimes lower the processing overhead and reduce heat generation. Avoid DSD Playback
If the heat is accompanied by a loud static build-up, immediate unplugging is recommended, as this typically indicates a temporary hardware "lock-up" or thermal throttling. Technical Specs (Inferred) Decoding Up to 32-bit / 384kHz Amplifier Class G (often integrated or paired with MAX97220) SNR Reported around 128dB (chip spec, implementation varies) Power Consumption
Drop multiple stitching thermal vias (0.2mm to 0.3mm hole size) directly underneath the chip’s ground pad down to a massive, uninterrupted internal or bottom ground plane. This pulls heat away from the silicon die and sinks it into the circuit board copper.
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.