Lm723 Variable Power Supply Schematic. Here 3a output current is attained by adding a pass transistor q1 to the ics output. To get a regulated power supply we use various voltage regulator ics like 7805 7812 etc but they all provide fixed value of output.
Because the standard lm723 circuit minimum output voltage is 2 volts to the ground of the integrated circuit terminal pin 7 is applied 4 7 volts using zener diode d4. It will keep a stable voltage when it has any load. However we can increase the current limit up to 10 ampere by using external transistors.
It will keep a stable voltage when it has any load.
In case of the misdesigned power supply the simplistic solution with a temperature unstable zener diode could be replaced by a better source of negative voltage what about another lm723 teilen mit. To get a regulated power supply we use various voltage regulator ics like 7805 7812 etc but they all provide fixed value of output. Lm723 a positive npn standard voltage regulator mainly designed for series regulator applications which can be utilized for both foldback and linear current. But it still has the same characteristics as a fixed regulated power supply.
