The controller ICE2HS01G, a 20-pin IC, is designed for pulse frequency modulated resonant converters, especially halfbridge LLC resonant converter. It operates with 50% duty cylce for two primary gate drives and 180o out of phase. The regulation of output voltage is achieved through adjustment of the switching frequency. To ensure the zero-voltage-switching and safe operation in half-bridge topologies, the dead time between primary high side switch and low side switch is setindependently to the switching frequency and also with high accuracy.In half-bridge LLC resonant converetr, as there is only one voltage control loop, current information in the LLC converter is used for proetctions. The current loop is designed to be much more faster compared to voltage loop and therefore providing a reliable protection for the converter.As synchronous rectification (SR) is a necessary measure to achieve high efficiency, ICE2HS01G features two driving signal for secondary SR switches. In order to ensure SR safe and proper operation, both the delay time between primary side switch and secondary SR switch and the duration of secondary SR switches can be programmed with external resistors.ICE2HS01G also offers multiple protections which ease the design of a reliable and high efficiency half-bridge LLC resonantconverter.