However, a widespread issue has plagued users across Amazon, Reddit, and AliExpress:
Add that to the chip's own 90mW dissipation, and you have 260mW of heat concentrated under a 3mm² die. Result:
Plugging your headphones into a 32Ω or 75Ω adapter before connecting to the DAC will limit output voltage, reducing the stress on the DAC and the resulting heat. cx31993 datasheet fix hot
: Avoid keeping the DAC in your pocket while in use. Passive cooling is most effective when the unit has enough "flow-by" air movement to dissipate heat from the enclosure. 2. Software & App Optimizations
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 However, a widespread issue has plagued users across
Conexant CX31993 Go to product viewer dialog for this item. has quickly become one of the most popular ultra-budget USB-C DAC chips on the market. Audiophiles and IEM enthusiasts love it for delivering at a fraction of the cost of premium setups. However, many users tracking down the technical datasheet face a common, frustrating issue: the dongle runs abnormally hot or builds up static hiss .
Similarly, users of the JCALLY JM7 reported: "It didn't heat up at all after testing for a long time; it's cold." . So, if you hold the casing and it feels physically painful to the touch, something is definitely wrong. Passive cooling is most effective when the unit
The CX31993 is a highly sought-after chip in various electronic applications, known for its reliability and efficiency. However, like any electronic component, it can sometimes present challenges, particularly when it comes to its datasheet. A datasheet is a crucial document that provides detailed specifications, operating conditions, and application information for a particular component. When issues arise, especially those related to heat, having accurate and reliable information from the datasheet is paramount. This article aims to guide you through understanding the CX31993 datasheet, common issues related to heat, and how to fix or mitigate these problems.
Page 12 of the OEM design guide (leaked) explicitly states: "The exposed thermal pad (EPAD, Pin 0) MUST be soldered to a continuous ground plane with at least 6 thermal vias to the backside copper."
