Description
A 12V power supply is a very essential and useful supply for Lab because it is used by a huge list of electronic circuits and devices. So you can build a 12V power supply circuit according to your ampere requirements.
Here is a 12V 5A power supply circuit using LM338 IC. LM338 is a adjustable voltage regulator IC available in 3 terminals. This IC also contains many built in features like current limit constant with temperature, thermal regulation, short circuit protection etc. The voltage of the LM338 is adjustable between 1.2 to 20 volt. But you can also use it on your desired fixed voltage between 1.2 to 20 volt. The circuit mentioned here is built to take 12V & 5 ampere fixed output from this IC. The IC will become hot during the operation due to which a suitable heatsink will be required.
LM338 features
- GUARANTEED 7A PEAK OUTPUT CURRENT
- GUARANTEED 5A OUTPUT CURRENT
- ADJUSTABLE OUTPUT DOWN TO 1.2V
- LINE REGULATION TYPICALLY 0.005% /V
- LOAD REGULATION TYPICALLY 0.1%
- GUARANTEED THERMAL REGULATION
- CURRENT LIMIT CONSTANT WITH TEMPERATURE
- STANDARD 3-LEAD TRANSISTOR PACKAGE
this is a test for 2A output
