The specific model of Ubixin 1239 inverter IC chip may require further details to be determined. The specific model of an IC chip is usually composed of the manufacturer and product family identifier. The UBIxin 1239 inverter IC chip may have been developed by a specific manufacturer, so relevant information can be found on Ubixin's official website, product manuals or technical support channels. In addition, if you can provide more contextual information, we can also try to answer your question more specifically.