AIM : To design a voltage regulated power supply using an op-amp with
an inbuilt overload protection.
CIRCUIT DIAGRAM: Con...
COMPONENTS REQUIRED:
PARTS LIST
R1 6.8kΩ
R2 1kΩ
R3 10kΩ Potentiometer
R4 22kΩ
R5 10kΩ
R6 0.6Ω 1W
R7 330Ω
R8 2.2kΩ 1W
C1 22...
D5 6.8V 500mA Zener Diode
T1 2N1481 or D313 or 2SC1061
T2 2N3055
T3 BC107
IC1 LM741
TR1 SEC 15V, 2AMP
BASIC OP-AMP :
THEORY:
The function of a voltage regulator is to provide a
stable dc voltage for powering of other electronic circuits. A...
Upcoming SlideShare
Loading in …5
×

Aim p

239 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
239
On SlideShare
0
From Embeds
0
Number of Embeds
8
Actions
Shares
0
Downloads
7
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Aim p

  1. 1. AIM : To design a voltage regulated power supply using an op-amp with an inbuilt overload protection. CIRCUIT DIAGRAM: Conversion of ac input to dc. DC regulated power supply using op-amp
  2. 2. COMPONENTS REQUIRED: PARTS LIST R1 6.8kΩ R2 1kΩ R3 10kΩ Potentiometer R4 22kΩ R5 10kΩ R6 0.6Ω 1W R7 330Ω R8 2.2kΩ 1W C1 2200µF 50v C2 100µF 50v C3 22µF 16v C4 o.1µF 50V D1 3 Amp Diode D2 3 Amp Diode D3 1 Amp Diode D4 6.8V 500mA Zener Diode
  3. 3. D5 6.8V 500mA Zener Diode T1 2N1481 or D313 or 2SC1061 T2 2N3055 T3 BC107 IC1 LM741 TR1 SEC 15V, 2AMP BASIC OP-AMP :
  4. 4. THEORY: The function of a voltage regulator is to provide a stable dc voltage for powering of other electronic circuits. A voltage regulator is capable of providing substantial output current. Rectifier diodes D1 and D2 along with capacitor C1 provide the main unregulated supply. D3, C2, R8 and zener diode provide a negative voltage supply for the 741. The non-inverting input terminal of 741 is given a stable voltage by R3 which is the control to set the output. A fraction of the regulated output is fed back via R4 and R5 to the inverting input terminal. The operational amplifier adjusts its output voltage so as to keep the voltage at the input terminals equal. Thus the output gets regulated. The output of 741 is amplified by a compound emitter follower T1 and T2. All the current flows through R6. If the load current exceeds 1A, the voltage drop across R6 exceeds 0.6 volts and T3 starts conducting. This bypasses the supply to T1 and T2 and the regulating action stops. The output voltage therefore starts falling when the load current exceeds 1A. Any of the output terminals can be grounded to get a positive or a negative voltage with respect to the ground. A 100ohm ¼ w resistance is added in the base circuit of current limiting transistor T3,to protect it during an output dead short,with out which the junction transistor will blow out. The voltage regulated power supply provides adjustable voltage output at a load current up to 1A. The supply has built in overload protection.

×