|Topology||LLC Resonant Converter|
|Input voltage||24 V|
|Switching frequency||100-1200 kHz|
|Output 1||15 V / 0.14 A|
These isolated gate drivers require their isolated bias supplies to be low cost, high reliability, low EMI, and immune to high CMTI (Common Mode Transient Immunity). UCC25800 open-loop LLC transformer driver is designed to meet these design challenges and provides a robust, cost effective, and low EMI solution for isolated gate driver bias. This application note introduces the LLC topology and the benefits of using LLC for isolated gate driver bias supplies. It also provides the design guidelines to simplify the design process.