PMP8930参考设计采用UCC28710初级侧稳压反激式控制20V输出，从一个万能交流输入。一个大容量电容器与慢电荷快速放电电路被放置在回扫输出，以提供长保持时间为以下降压型DC-DC阶段。TPS54335用作控制器和功率级用于主4V或12V输出。该UCC28710的谷底导通使这种低成本的设计，实现了83％的最大负荷效率;空载损耗低于70mW。

The PMP8930 reference design uses the UCC28710 primary-side regulated flyback controller to generate a 20V output from a univeral AC input. a bulk capacitor with slow-charge-fast-discharge circuit is placed at flyback output to provide long hold up time for the following step-down DC-DC stages. TPS54335 is used as the controller and power stage for the main 4V or 12V output. The valley switching of the UCC28710 allows this low-cost design to achieve a maximum load efficiency of 83%; no load losses are less than 70mW.