7815 Voltage Regulator Circuit Diagram. In the first part the ac mains is converted into unregulated dc and in the second part this unregulated dc is converted into regulated 5v dc. 7805 voltage regulator provides 15v positive voltage as output to provide a convenient power source for most ttl components.
This dc voltage is then delivered to the voltage regulator ic 7815. The ic 7812 voltage regulators do operate at their optimal capability if the input voltage is at least 2 5 volt greater than the output voltage i e 14 5 v min and the current is 1 or 1 5 amperes more. Such situation might call for a larger heatsink for the regulator ic.
The 7800 regulators can also be employed as current sources.
Lm7815 is a fixed voltage integrated circuit voltage regulator designed for a wide range of applications. A full wave rectifier and capacitor filter then provides an unregulated dc voltage with ac ripple of a few volts as input to the voltage regulator. 7815 voltage regulator is monolithic integrated circuits designed as fixed voltage regulators for a wide variety of applications including local on card regulation. A typical application circuit of a power supply using a fixed voltage 78xx monolithic voltage regulator can be seen below.
