Variable voltage power supply with high current using LM 317
Making adjustable power supply is very interesting. The electronics enthusiast should know about LM 317 ic power supply. But this power supply circuit is differ from other power supply. Only the single LM317 IC will deliver up to 1.5 ampere current in the output. But this circuit combination will deliver up to 5 Amp. Looking sounds good ? Yes the three combination of LM 317 IC will deliver high current in the output of the circuit.
The LM 317 is a three led single ic can adjust the voltage from 1.5 v to 25 v dc at max current of 1.5 amps. So Proper heat sink is necessary for heat dissipation and reducing the IC damaging. Because of the high current passage through the 3 IC.
Variable voltage power supply circuit diagram
The R1, R2, and R3 are 5 watt resistors of 0.22 ohm. Adjust the R5 resistor for controlling the output voltage.
Variable power supply Circuit application
- Control voltage from 1.5v DC to 25v DC
- High current application with controlled voltage.
- Adjust the motorcycle light brightness.
- Battery charging with controlled voltage and ampere.
- Use it as a branch power supply.
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