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  • This AC to DC converter circuit is capable of converting an alternative voltage within 70V – 260V range into a DC voltage within 180V to 350V DC range, so it can be used for 110V and 220V too. To achieve this voltage conversion we use a MC34161 rectifier as a voltage doubler at low input voltages and as a classic rectifier at high input voltages.

    Input AC voltage/Output DC voltage table

    ac dc voltage table

    AC to DC converter circuit diagram

    ac to dc converter diagram

    MC34161 includes a reference power supply which delivers 2.54V at pin 1. The signal level applied at pin 2 is internally compared with a 1.27V voltage.
    D5 zener diode, togheter with R1 and C4 provide IC’s required 12V voltage. Capacitor’s voltage of C2 and C3 must be greater than 250V.

    Attention: this ac to dc converter contains very high voltages that are deadly and you must be very careful!

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    6 Responses to "AC to DC Voltage Converter Circuit"

    1. subhransu says: on November 29, 2012 at 6:11 am

      shall i have to use a 230v 3A fuse here for this circuit

    2. somiya1234 says: on December 4, 2012 at 4:46 am

      can u explain me the working of the above circuit .?

    3. hilarious sibanda says: on June 21, 2013 at 6:31 pm

      may someone please explain the operation of the circuit, especially the purposes of resistors R7 & R8 and capacitors C2 & C3

    4. Hi,
      Can I replace the IC MC34161 and TRI TIC216 with other IC and TRI?
      Because it’s hard to get in my country….

    5. pleas ,i want a circuit from led driver 150w

    6. Can u please let me know why we have to convert Ac to dc. why we cannot use dc power 12v or 24v, etc directly for appliances which can reduce cost.

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