Functional Block Diagram, Working and Design of General Purpose 723 | Voltage Regulators in LIC

Explore the essence of voltage regulation with a deep dive into the General Purpose 723! Unravel its functional block diagram, understand its intricate workings, and master the art of its design in this enlightening video. Join us to decode the secrets behind voltage regulators in the Life Insurance Corporation (LIC). Whether you're a beginner seeking foundational knowledge or an enthusiast delving into advanced concepts, this insightful discussion is your gateway to comprehending the core of voltage regulation. Elevate your understanding of electronics and join us in unraveling the mysteries of the 723 voltage regulator!
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Here is the simple explanation of block diagram working 👇👇
The IC 723 voltage regulator operates using a feedback control mechanism to maintain a constant output voltage. Here's a brief description of its block diagram:
1. **Reference Voltage Source**: The IC 723 has an internal voltage reference source providing a stable reference voltage (Vref).
2. **Error Amplifier**: The error amplifier compares the reference voltage with a fraction of the output voltage. The resulting error signal is amplified and used to control the output voltage.
3. **Voltage Divider Network**: This network divides the output voltage to provide a portion of it for comparison with the reference voltage in the error amplifier.
4. **Adjustment Terminal (ADJ)**: This terminal allows external resistors to be connected, enabling the user to set the desired output voltage.
5. **Output Transistor(s)**: The output stage consists of one or more transistors that are controlled based on the error signal from the amplifier. These transistors adjust the output voltage to maintain it at the desired level.
6. **Current Limiter**: The IC 723 often includes a current limiter to protect the device and the connected load from excessive currents.
7. **Voltage Limiting Circuit**: This circuit prevents the output voltage from exceeding a predefined limit, ensuring the stability and safety of the regulator.
8. **Thermal Shutdown Circuit**: To protect the IC from overheating, a thermal shutdown circuit is included. It disables the regulator temporarily if the temperature rises beyond a specified threshold.
In summary, the IC 723 voltage regulator employs a feedback loop to compare the actual output voltage with a reference voltage and adjusts it through the output stage to maintain a constant and stable output.

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