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What is minimum voltage of LM317 voltage regulator?
The minimum output voltage of LM317 voltage regulator 1.2V. In order to get 0V at the output we are using 3 diodes D7, D8 and D9. Here 2N3055 transistors are used to get more current. Pot RV2 is used to set the maximum current available at the output.
Can a variable power supply be created with a single IC?
But this circuit can be created with a single IC is lm317 based variable power supply. The LM317 or LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to the 37V output range,
Which is the best variable power supply circuit?
Here is an LM317 Adjustable power supply circuit. If you are a beginner in electronics. You want a good variable power supply. This may be the best project for you. It can supply the output voltage 1.2V to 30V at the max current of 1.5A.
What’s the Max Voltage for a DC power supply?
It can supply the output voltage 1.2V to 30V at the max current of 1.5A. New update Please read below this article. This is the first DC power supply in my life that made to use in many projects. It is ideal for those who want to adjust voltage from 1.25V to 30V and currents up to 1A. Which is sufficient for normal use.
Which is the short circuit protection diode in LM317?
D1 is the output short-circuit protection diode. When the output terminal is short-circuited, CE1 discharges through D1. If there is no D1, CE1 discharges through LM317, which is easy to damage LM317. C1 is the input filter capacitor and C2 is the output filter capacitor.
Which is a soft start circuit using LM317?
Figure 3 is a soft-start circuit using LM317. At the moment of power-on, the voltage of CE1 cannot change suddenly. Q1 is biased by R1 and R2 to be saturated and conduction, so that RP1 is short-circuited, which is equivalent to the grounding of the adjustment terminal of LM317.
How are 2N3055 transistors used in a circuit?
Here 2N3055 transistors are used to get more current. Pot RV2 is used to set the maximum current available at the output. If you use a 100 ohm/1 watt potentiometer then the output current is limited 3 Amps at 47 ohms and 1 Amp at 100 ohm. LM317 is the 3 pin series adjustable voltage regulator.