Cx31993 Datasheet Fix Hot Direct

is a high-performance USB-C DAC chip from Conexant, widely used in budget "Hi-Fi" dongles. While it offers impressive specs like 32-bit/384kHz sampling and >128dB SNR, users frequently report issues with the device becoming physically hot during use, particularly when paired with Windows systems or high-resolution formats like DSD. 1. Core Specifications

If your CX31993 dongle is becoming uncomfortably hot or producing static, try these common community-vetted solutions: Is it normal for a May DAC to run hot? - Facebook cx31993 datasheet fix hot

Plug in the dongle with no headphones attached.
Measure USB current draw. If it's >20mA, your LDO or PLL is faulty.
Play a 1kHz test tone at 50% volume.
After 10 minutes, measure the case temperature. >60°C = urgent fix required.

The "Dual-Chip" Upgrade: If you plan on driving bigger headphones, look specifically for dongles labeled "CX31993 + MAX97220". These units pair the CX31993 DAC chip with a Maxim MAX97220 standalone amplifier chip. This raises the power output to about 125mW–140mW, successfully bridging the gap for harder-to-drive gear. is a high-performance USB-C DAC chip from Conexant,

Toggle Bit-Perfect Mode: Temporarily disabling "Bit-perfect" mode may help if the source device is struggling to manage high-resolution streams, though this may slightly impact sound quality. Plug in the dongle with no headphones attached

| 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 |

Improper Power Handling: Excessive heat can occur when the DAC draws more power than the internal thermal management can dissipate, especially on desktop PC ports that may lack strict current limiting.

Output Power: Typically 65mW (often limited by the specific dongle's power supply). Why Your CX31993 DAC Gets "Hot"