Step up voltage converter
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 circuit diagram
Notes.
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Assemble the circuit on a good quality PCB.
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Input voltage should not be raised above 12V.
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While soldering lead temperature must not exceed 300C.
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Informative circuit diagram! It is explain about voltage converter. The comments are so nice. Thanks a lot…
good bye
Hi Sigitas 8 volt at 700mA
ref NS site
http://www.national.com/ds/LM/LM2700.pdf
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?
What is max current for this circuit to drive?
Thanks