Step up voltage converter

admin February 11, 2011 8 Comments

DC Step Up Voltage Converter

Description.

A simple DC to DC step up  voltage converter using LM2700 is shown here. LM2700 is a step up switching converter that has a 3.6A, 80 M ohm internal switch. It can be operated at 600 kHz or 1.25MHz switching frequency.
In the circuit LM2700 is wired in order to produce 8V DC output from a 3V input at a switching frequency of 600MHz. Resistor network consisting of R2 and R3 sets the output voltage. Capacitor C1 and C2 are meant for input voltage filter for reducing ripple and noise. FSCLT pin (pin13) is connected to ground in order to run the IC at 600KHz switching frequency. Connecting this pin to Vin will make the IC run at 1.25MHz.

Step up voltage converter Circuit diagram.

Step up voltage converter dc to dc

Step up voltage converter circuit diagram

Notes.

  • Assemble the circuit on a good quality PCB.
  • Input voltage should not be raised above 12V.
  • While soldering lead temperature must not exceed 300C.

Other Voltage converter circuit that you might be interested in:

1. Buck Boost Converter Circuit

2. 6 to 12 Volts converter

3. 3 Volts to 5 Volts Converter

Comments
  • Sarah Kiyingi-Kaweesa
    October 24, 2014

    Dear Sir/Madam,

    Please, I have a Challenge as below:
    The power per cell is only about 1 W. This has to be converted from about 2V DC to 240 V AC (the actual voltage varies between 1V to 4 V depending upon climatic conditions and sunlight). Hence currents and hence power will be low.

    The requirement therefore is for an integrated circuit that will handle both the DC voltage fluctuations and the power fluctuations and step up to 240V AC. There will be at least 10,000 of these little cells that will go to make up the 10KW final output of the load. That is what needs to be handled by each of the circuits that make up the final array for the 10,000 KW

    Its like an array of solar cells, only the source is slightly different

    You need to design the circuit for me.

    Sarah Kiyingi-Kaweesa
    CEO
    Bio Jigsaw Limited
    +256714202050

  • kiran
    June 1, 2012

    Hi sir, i am not able to find mbr1520 diode is there any alternate?and what is the cost of this ic in indian rupee?

  • Adeyemo Victor
    October 1, 2011

    Pls I need (1) 220vac-220vac ups circuit diagram (2) 220vac-220vac voltage regulator circuit diagram and 220vac gen set and main supply automatic changeover diagram

  • Voltage_Converter
    February 10, 2011

    Informative circuit diagram! It is explain about voltage converter. The comments are so nice. Thanks a lot…

  • ugo testa
    February 10, 2011

    good bye

  • Seetharaman
    February 10, 2011

    Hi Sigitas 8 volt at 700mA
    ref NS site
    http://www.national.com/ds/LM/LM2700.pdf

  • ILAMATHI K.
    February 9, 2011

    PLEASE CHECK THE THEORY PART OF LOW COST FIRE ALARM CIRCUIT. IS THE COLLECTOR OF Q2 CONNECTED TO BASE OF Q3 OR THE EMITTER OF Q2 CONNECTED TO BASE OF Q3?

  • Sigitas
    February 9, 2011

    What is max current for this circuit to drive?
    Thanks

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