手机充电器电路原理图

几种常见充电器电路原理图

1.

2.

3.HP82011 (etc) ’’’’classic series’’’’ charger
                 --------------------------------------

              (Unregulated PSU) 

-----)||
     )||(----+---->|--+----+----- 힥
     )||(    |         |     |
     )||(    |  +->|--    === 400uF
Mains)||(    |  |           ---
     )||(    +-)--|<--     |
     )||(       |      |     |
     )||(-------+-|<--+----+--
-----)||                         |
                                ---  
                                /// 

         (Constant voltage regulator) 

              c        e
힥 ----+-----    >---------------------- .2V Logic Supply
          |         /  (NPN power transistor)
          |      -------
          /         | b
                   |
          / 470R    |
                   |
          |         |
          +--------
          |
         ---,
          ^  4.7V zener
          |
         ---
         /// 

                (Constant current charger) 

                              (PNP power transistor)
               13R            e       c 
힥 -----+---//---+------->   /------------- 55mA constant current
          |            | b        /                  charger supply
          |          -----      -----  
          |      e    /   c      | b
          +--------->   --------
         (PNP signal transistor)  |
                                  /
                                   4k7 
                                  /  
                                  
                                  | 
                                 ---  
                                 ///