此设计为30W 小型化壁式Type C PD 充电器，使用TI UCC28780 搭配Navitas NV6252来实现小型化需求，UCC28780是一款高频有源箝位反激式控制器(ACF)，工作频率可达1MHz，可操作在零电压开关（ZVS）且能在宽电压工作范围内实现，具有先进的自动调谐技术，自适应死区时间优化和可变开关频率控制律。使用自适应多模控制可根据输入和输出条件改变操作，可在降低可听噪声的同时实现高效率。 NV6252为Navitas推出的一款非对称半桥GanFet适用于ACF架构，内含Gate drive可降低在高频操作时带来的杂讯影响，与Si MOSFET相比具有的优势，包括超低输入和输出电容，零反向恢复，降低开关损耗多。 这些优势可实现密集且高效的拓扑结构。 核心技术优势1. 可操作在ZVS，操作频率高达1MHz，利于小型化 2. 5V功耗91.5% 3. 22.42 W/in. 方案规格1. Input Voltage:90Vac~264Vac 2. Output: 15V/2A, 12V/2.5A, 9V/3A, 5V/3A 3. Protect: OVP,OPP,OTP 4. Operate Freqency:200KHz~360KHz 方案来源于大大通

150W, AC-19.5VDC PFC+LLC Demo Board This design uses a Critical Conduction Mode (CrCM/DCM) PFC (AC-400 VDC), followed by an LLC DC-DC (400-19.5 VDC). For both stages, the switching frequency was increased to the maximum allowed by the off-the-shelf control ICs available. The board is designed to be a ‘demonstration’ board, and is not yet optimized as a production design. With this design, a power density of 1.56 W/cc or 25.5 W/in3 is achieved, which is around 2x typical and 40% more than the best-on-class Si-based design today. Customer designs are expected to achieve even higher power density.