12V to 120V DC DC converter

admin February 17, 2011 13 Comments
Description. A simple 12V to 120V DC DC converter circuit is shown here. The circuit consists of two stages firstly a basic inverter stage and then a rectifier plus filter stage. IC1 NE555 is wired as an astable multivibrator operating at a frequency of 100Hz and it can be adjusted using the preset R1. Output of IC1 is coupled to the clock input of IC2 which is a CMOS dual D Flip-Flop. IC2 divides the 100Hz pulse train from...
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5V boost converter

admin February 17, 2011 5 Comments
5V Boost Converter circuit . Description. A simple 5V boost converter using LTC3440 is shown here. LTC3440 is a highly efficient DC to DC converter that can be operated from input voltages below, above or equal to the output voltage. In terms of synchronous rectification, LTC3440 provides up to 96% efficiency and up to 600mA of output current is guaranteed. The IC has a built in synchronizable oscillator whose frequency whose frequency can be adjusted from 300 KHz to...
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Buck boost converter circuit

admin February 10, 2011 9 Comments
Buck Boost converter circuit using LTC3440 Description. A very efficient buck boost converter circuit is shown here. The circuit is based on the LTC3440 buck boost regulator IC from Linear Technology. The LTC3440 requires only one inductor and provides up to 96% efficiency. There is no need of Schottky diode for applications where output voltage is less than 4.3V and the IC can deliver up to 600mA output current. In the circuit the IC is wired as a buck...
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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...
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Voltage converter circuit using TDA2003

admin February 14, 2011 3 Comments
Voltage Converter Circuit – 6 to 12 volts One of our valuable readers asked us about any other application of the Audio amplifier IC TDA2003. Well, it can be used to build a Voltage converter circuit. Here’s an example of 6 to 12 volts converter using the same IC Description of the Voltage converter circuit: Two TDA2003 ICs are used here which are wired as oscillators and their outputs are identical but 180 out of phase. Capacitors C3 and...
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12Volt from USB port

admin February 23, 2011 10 Comments
12 volt DC Power Supply from USB port The circuit given below infact is a 5 volt to 12 volt converter. It uses the 5 Volts from USB port and converts it to 12 volts DC with the help of IC LT1618. Description : Using this circuit we can convert 5V DC from the computer USB port to 12V DC and a circuit like this will find a lot of application in USB powered systems. The heart of this...
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Voltage Converter 3V to 5V using MAX660

admin February 9, 2011 1 Comment
Voltage Converter Circuit. Circuit given below is a 3V to 5V Voltage converter using CMOS IC MAX660 and MAX667. Description : In the circuit shown below, a 3V to 5V converter is implemented using MAX660 and MAX667. MAX660 is a CMOS monolithic voltage converter and MAX667 is a programmable low dropout positive voltage regulator. Here MAX660 performs the job of voltage boosting and MAX667 regulates the output of MAX660 inorder to give a steady 5V DC output. Circuit diagram...
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Voltage Doubler cum Inverter Circuit

admin February 9, 2011 No Comments
Voltage Doubler and Inverter Given below is the circuit diagram of a DC Voltage doubler and voltage inverter. Circuit uses a voltage converter IC MAX660. Description . A voltage doubler cum inverter circuit using the IC MAX660 IC is shown here. MAX660 is a CMOS monolithic voltage converter IC from Maxim Semiconductors. The monolithic charge pump inverter circuitry inside the IC can invert +1.5V to 5.5V input to a corresponding negative output. The IC requires very few external components...
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10V switching regulator using LM5007

admin September 2, 2010 7 Comments
Description. The circuit diagram shown here is of a 10V switching regulator based on the LM5007 from National Semiconductors. The LM5007 is an integrated step down switching regulator which has all necessary systems required for making a cost effective and reliable switching regulator circuit. The IC is available in MSOP-8, LLp-8 packages and has a lot of  built in  features like thermal shut down, under voltage lock out, duty cycle limiting, current limiting etc. The output voltage of this...
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30V / 3A adjustable regulator using LM723

admin July 23, 2010 15 Comments
Description. Here is the circuit diagram of a 30V/3A adjustable regulator using the LM723 IC from the National Semiconductors. LM723 is an integrated series regulator whose output voltage can be adjusted between 2V and 37V. The IC by itself can deliver an output current of 150mA and the maximum input voltage to the IC is 40V. Here 3A output current is attained by adding a pass transistor (Q1) to the ICs output. The pass transistor used here is a...
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