Constant Current Constant Voltage Power Supply Circuit

The constant current source currently does not have a dedicated case but instead uses an open style to demonstrate the construction.

Constant current constant voltage power supply circuit.

Aceirmc constant current cc cv buck converter module dc 6 40v to 1 2 36v 20a 300w adjustable step down voltage regulator power supply module with short circuit protection function 3 5 out of 5 stars 12. I easily get continuously adjustable output voltage 1 30v and current 0 6a which is pretty enough for circuit testing and other things i m also using 7805 voltage regulator ic for 5v constant voltage and current. Constant voltage power supply circuit for many electronic application circuits we need constant voltage power supply source when we design a electronic product we should keep in mind that different voltage standards are followed by different countries. This is the type of power that is typically output from your wall outlets around the home.

The lt3741 simplifies the design of constant current constant voltage regulators by combining an accurate current regulator and an accurate voltage regulator in a single ic thus eliminating power system design trade offs. Constant current and current limit are two different thing in constant current you don t set the output voltage it is automatically adjusted to provide the desired current to the load on the other hand in the current limit you set the voltage and there is a limiter that doesn t allow the load to get more current that the specified one. This circuit despite outputting large currents uses very low voltages less than 12v so this circuit is very safe unlike mains powered projects. Output voltage 1 30v continuously adjustable.

Q2 acts as a variable resistor stepping down the voltage from the power supply to match the need of the led s. With a large heatsink this circuit can handle a lot of power. A constant voltage power supply receives standard line voltage 120 277vac. Circuit before wired up.

The lt3741 is a synchronous buck dc dc controller designed to regulate output currents up to 20a and output voltages up to 34v with a current regulation accuracy of 6 and a voltage accuracy of 1 5. So q2 will need a heatsink if there is a high led current or if the power source voltage is a lot higher than the led string voltage.