脈沖電子ep13加優化變壓器平臺

　　有電子應用廣泛的品種，包括以太網供電，數據通信，電信，工業，工作于12 V、24 V或48 V輸入需要隔離開關模式電源解決方案將提供輸入電壓來調節輸出電壓和電流。對于低于60瓦的功率電平，最常見的電源開關拓撲使用的是連續模式反激式拓撲結構和有源復位正向拓撲。領先的變壓器平臺對于這些應用，在功率效率方面目前的電路板面積，和成本，是事實上的行業標準ep13。本文已經建立了詳細的ep13加平臺的發展，具有相同的物理尺寸和足跡為ep13但能夠處理更高的功率。下圖1顯示了優化變壓器的設計。

　　As system efficiency becomes increasingly more important and output power requirements continue to increase， two limiting factors emerge when using the industry standard EP13. The first is pin size and coplanarity. Surface-mount transformers must have excellent coplanarity to ensure that the leads are properly soldered to the printed circuit board and to avoid excess heating in the solder interconnection. However， the standard EP13 platform was initially developed for low current telecom filter magnetics so the pin is small and there is little room to terminate higher current windings. As a result， the standard EP13 platform limits the size and number of wires that can be terminated on a pin， and therefore increases the transformers resistance， which limits the through-power. Pulse Electronics took on the goal of creating a more efficient transformer while maintaining the same package size and footprint as the standard EP13. To solve the limitations caused by the pin size， as Figure 2 shows， Pulse’s EP13 Plus platform has employed a larger pin with twice the winding termination area resulting in a 20% reduction in winding resistance and therefore higher through-power.