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MOBILE PHONE BATTERY CHARGER CIRCUIT DIAGRAM

MOBILE PHONE BATTERY CHARGER CIRCUIT DIAGRAM

The 220V AC mains supply is downconverted to 9V AC by transformer X1. The transformer output is rectified by diodes D1 through D4 wired in bridge configuration and the positive DC supply is directly connected to the charger’s output contact, while the negative terminal is connected through current limiting resistor R2. LED2 works as a power indicator with resistor R1 serving as the current limiter and LED3 indicates the charging status.

During the charging period, about 3 volts drop occurs across resistor R2, which turns on LED3 through resistor R3. An external 12V DC supply sourcecan also be used to energise the charger, where resistor R4, after polarity protection diode D5, limits the input current to a safe value. The 3-terminal positive voltage regulator LM7806 (IC1) provides a constant voltage output of 7.8V DC since LED1 connected between the common terminal (pin 2) and ground rail of IC1 raises the output voltage to 7.8V DC. LED1 also serves as a power indicator for the external DC supply. After constructing the circuit on a veroboard, enclose it in a suitable cabinet. A small heat sink is recommended for IC1.

4 comments:

  1. Thank you,
    The information you shared is very informative.

    ReplyDelete
  2. I want mobile phone battery charger circuit which convert 220 volt AC to 5 volt DC.
    if any one have then plz share to me on raj303@gmail.com

    ReplyDelete
  3. Thanks for sharing information.
    recharge plans
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    ReplyDelete
  4. thank you for the information , very Informative .
    Power Bank

    ReplyDelete