UCC25660 High-Frequency LLC Controller Texas Instruments UCC25660 High-Frequency LLC Controller implements the Input-Power Proportional Control (IPPC) scheme, enhanced light-load management, and multiple protection features. IPPC widens the control range of the LLC converter and simplifies the design of wide input and output-voltage range applications such as LED drivers and battery chargers. It can even work without a PFC for non-universal input applications.