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    s-oil回首頁

    關閉
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    現在公司核心團隊、技術、品質等優勢彰顯,
    南麟正以驚人之速度穩步增長,誠邀有識之士與顧客共圖大業。
    應用方案
    +充電器應用

    充電器應用

    基于LN2535的低成本手機充電器應用方案
    ——CC/CV(恒流/恒壓)5V/1A

    1. 簡介

    本文是一份基于LN2535設計的低成本手機充電器的應用方案報告。本方案使用LN2535驅動外接NPN三極管例如13003,是典型的低成本的開關電源方案。該方案具有低成本、無需光耦及Y電容、良好的恒流/恒壓性能和低待機功耗等特點。此應用尤其適合小功率充電器上成本控制敏感的地方,例如手機充電器、MP3播放器的充電器等。本文內容包括電路原理圖、材料清單、變壓器文件和性能測試數據。

    方案基本特性:

    • PWM控制的超低成本手機充電器方案
    • 初級調整技術
    • 免光耦
    • 無需Y電容和共模EMI濾波器
    • 85VAC-264VAC全電壓輸入范圍
    • 低待機功耗
    • 高精度恒流恒壓輸出
    • 超越CEC平均效率要求
    • 外部元件少
    • 集成輸入電壓變化補償電路
    • 集成變壓器電感變化補償電路
    • 集成輸出線損補償電路
    • 輸入欠壓保護、輸入過壓保護
    • 輸出短路保護、輸出過壓保護
    • 過溫保護
    • 反激式DCM工作模式
    • SOT23-5封裝

     

    2.電路原理圖

    圖片1.png

    3. 材料清單

    0.jpg

    4. 變壓器規格
    4.1. 示意圖

    圖片1.png

    變壓器示意圖

    4.2. 材料清單

    0.jpg

    注:SH1、SH2為屏蔽層,SH3、SH4為銅箔屏蔽層,P1、P2為初級,S1為次級。

    4.3裝配圖

    圖片1.png

    4.4. 電氣規格

    0.jpg

    5. 性能測試數據
    5.1. 待機功耗

    0.jpg

    圖片1.png

    5.2. 效率(AWG24#,1.5m)

    0.jpg

    圖片1.png

    5.3. 輸入電壓和負載調整率

    0.jpg

    圖片1.png

    5.4. 紋波和噪聲

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    5.5. 開機和關機

    0.jpg

    5.6. 恒流和過流

    0.jpg

    圖片1.png

    5.7. 短路與釋放

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    5.8. 輸入欠壓測試

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    6. 耐壓測試
    6.1 耐壓測試

    0.jpg

    COPYRIGHT ? 上海南麟電子股份有限公司 2017 版權所有
    666彩票

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