IC LM78XX for Power supply

The 78XX series is the series of voltage regulator IC's, this series of IC's are mostly used in power supply circuit. Due to its some advantages and low cost it is widely used .

In this series of 78XX ,"XX" is replaced by 2 digit depending on its output voltage. Such as 7805 (5 volts), 7806 (6 volts), 7809 (9 volts), 7812 (12 volts), 7815 (15 volts), 7818 (18 volts), 7824 (24 volts).




The IC consists of three terminals:

1. Input (Line voltage).
2. Ground(Common).
3. Output (VReg).

This IC consist of a heatsink, which help it from damaging through heat.

But if the current is more than the IC will get heated very fast, the solution is to join another heatsink to the IC .



I have posted some power supply project based this IC, click here (for 5v power supply circuit)