The DNA 30D chip is made by a company called Evolv. Evolv describe the chip on their website:
The DNA system lets anyone build Evolv’s patented power regulated technology into their own products. The DNA 30D is a power regulated digital switch-mode DC-DC converter for personal vaporizers. It offers controlled power from 7 to 30 watts, runs from a single lithium cell and includes protective features such as overcurrent, over and undervoltage protection and a thermal shutdown. It features a small OLED display, analog or digital user controls, power adjust lock, onboard buttons and synchronous rectification for maximum battery life and minimal heat generation. The DNA30D is the same size as the DNA20D.