<P> </P>
<P> </P>
<P>几种常见充电器电路原理图</P>
<P>normal chargers’’’’ schematic</P>
<P> </P>
<P><A href="http://www.52rd.com/bbs/dispbbs.asp?boardID=56&ID=15346&page=1"><FONT color=#3809f7 size=5>请进入论坛讨论手机充电器原理图</FONT></A></P>
<P>1.</P>
<P> </P>
<P></P>
<P>2.</P>
<P><BR></P>
<P>3.HP82011 (etc) ’’’’classic series’’’’ charger<BR>                 --------------------------------------</P>
<P><BR>              (Unregulated PSU) 
<P><BR>-----)||<BR>     )||(----+---->|--+----+----- 힥<BR>     )||(    |         |     |<BR>     )||(    |  +->|--    === 400uF<BR>Mains)||(    |  |           ---<BR>     )||(    +-)--|<--     |<BR>     )||(       |      |     |<BR>     )||(-------+-|<--+----+--<BR>-----)||                         |<BR>                                ---  <BR>                                /// 
<P><BR>         (Constant voltage regulator) 
<P><BR>              c        e<BR>힥 ----+-----    >---------------------- .2V Logic Supply<BR>          |         /  (NPN power transistor)<BR>          |      -------<BR>          /         | b<BR>                   |<BR>          / 470R    |<BR>                   |<BR>          |         |<BR>          +--------<BR>          |<BR>         ---,<BR>          ^  4.7V zener<BR>          |<BR>         ---<BR>         /// 
<P><BR><BR>                (Constant current charger) 
<P><BR>                              (PNP power transistor)<BR>               13R            e       c <BR>힥 -----+---//---+------->   /------------- 55mA constant current<BR>          |            | b        /                  charger supply<BR>          |          -----      -----  <BR>          |      e    /   c      | b<BR>          +--------->   --------<BR>         (PNP signal transistor)  |<BR>                                  /<BR>                                   4k7 <BR>                                  /  <BR>                                  <BR>                                  | <BR>                                 ---  <BR>                                 /// <BR></P>(52RD.com)