CX7181-05- 5V2.1A適配器方案

                                                      整體方案描述：

                                                 1.AC輸入范圍90—264Vac

                                                 2.DC輸出5V,2.1A

                                                 3. OVP>5.8V

                                                 4.滿足＂EPA_2.0＂能效要求

                                                 5.最大紋波＜80Mvp-p

                                                            圖1.Demo實物圖

                                           特性：

•                                      全電壓范圍內±%的恒壓精度、±%的恒流精度
•                                      使用原邊反饋控制，可省去光耦與TL431
•                                      外部可設定恒流值與輸出功率
•                                      內置原邊反饋恒流控制
•                                      內建自適應峰值電流控制
•                                      內建原邊電感補償
•                                      可外部調整的線壓降補償
•                                      上電軟啟動
•                                      內置前沿消隱(LEB)功能
•                                      逐周期限流保護（OCP）
•                                      欠壓保護（UVLO）、過壓保護（OVP）、VDD 電壓箝位保護

          一、規格與參數

       二、原理圖 

                  2.1  BOM清單

                 2.2 Demo變壓器示意圖

             2.2.1  SCHEMATIC:

             2.2.2  Winding process：

               2.2.3  Electrical characteristic：(AT 25℃)

              1.INDUCTANCE:  (Lp,f=1KHz, 1V)      Lp（2-1)=1.2mH±5%  Ls(漏感)<5% lp="" strong="">

              2. HI-POT：P -  S:       AC 3.75KV/5mA/50Hz  5 Sec  

                                    P,S – C:     AC 1.5KV/5mA/50Hz  5 Sec

               2.2.4  MAIN MATERIAL LIST：

              2.3  Demo板結構示意圖

            2.4  Demo板印制圖

                                TOP View

                               Bottom View

           三、測試數據

                  3.1 效率測試