Electronic System Design(ESD) B.E Practical I:
EXPERIMENT NO 1:
Design and Implement low Dropout Regulated Power Supply for 5V @ 1A
The performance of each and every electronic system or electronic circuit depends upon thepower supply that energizes the circuit or system. It provides required current to the circuit.
Any disturbance noise in this power supply can cause problem in working or operation of circuit. If there is any deviation in this power supply level the circuit may not work properly. The accuracy and precision of circuit operation depends upon it. In some of the circuits all the calibration are done at this voltage level. So, all these calibrations become false if there is fluctuation in supply level.
There are two types of power supplies-
1) Unregulated power supply
2) Regulated power supply
Unregulated supply is used in some circuits where there is no much change in required load
current. The load current remains fixed or deviation is very less. Because in such supply
1) The output voltage reduces as load current increases
2) The ripple in output voltage increases as load current increases
So this kind of supply cannot be used where there is noticeable change in load current frequently. But although many circuits works on unregulated supply because it requires very few components and design is also very simple. Also some fluctuation in supply level can be tolerated due to load current change.The regulated power supply is required in digital circuits, the circuits in which the components cannot tolerate even 1% change in supply level like micro controller, micro processor etc.
1) Unregulated power supply
2) Regulated power supply
Unregulated supply is used in some circuits where there is no much change in required load
current. The load current remains fixed or deviation is very less. Because in such supply
1) The output voltage reduces as load current increases
2) The ripple in output voltage increases as load current increases
So this kind of supply cannot be used where there is noticeable change in load current frequently. But although many circuits works on unregulated supply because it requires very few components and design is also very simple. Also some fluctuation in supply level can be tolerated due to load current change.The regulated power supply is required in digital circuits, the circuits in which the components cannot tolerate even 1% change in supply level like micro controller, micro processor etc.
I have explained the working in details in the following video :
click👆
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