ON Semiconductor
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MC7812BTG
বিস্তারিত দেখুন ডেটাশিট

MC7812BTG

Product Overview

Category

MC7812BTG belongs to the category of voltage regulators.

Use

It is commonly used to regulate and stabilize the output voltage in electronic circuits.

Characteristics

  • Input Voltage Range: 14V to 35V
  • Output Voltage: 12V
  • Maximum Output Current: 1A
  • Package Type: TO-220
  • Operating Temperature Range: -40°C to +125°C
  • Low Dropout Voltage
  • Short Circuit Protection
  • Thermal Overload Protection

Package and Quantity

MC7812BTG is available in a TO-220 package. It is typically sold in packs of 10 units.

Specifications

  • Input Voltage Range: 14V to 35V
  • Output Voltage: 12V
  • Output Current: Up to 1A
  • Dropout Voltage: 2V (maximum)
  • Line Regulation: 0.04% (typical)
  • Load Regulation: 0.3% (typical)
  • Ripple Rejection Ratio: 62dB (typical)
  • Quiescent Current: 5mA (typical)

Pin Configuration

MC7812BTG has three pins:

  1. Input Pin (Pin 1): This pin is connected to the input voltage source.
  2. Ground Pin (Pin 2): This pin is connected to the ground or common reference point.
  3. Output Pin (Pin 3): This pin provides the regulated output voltage.

Functional Features

  • Voltage Regulation: MC7812BTG ensures a stable output voltage of 12V, regardless of variations in the input voltage.
  • Short Circuit Protection: It incorporates short circuit protection, preventing damage to the regulator and the connected circuitry in case of a short circuit.
  • Thermal Overload Protection: The device includes thermal overload protection, which shuts down the regulator if it exceeds the safe operating temperature range.
  • Low Dropout Voltage: MC7812BTG has a low dropout voltage, minimizing power dissipation and improving efficiency.

Advantages and Disadvantages

Advantages

  • Provides stable and regulated output voltage.
  • Offers short circuit and thermal overload protection.
  • Low dropout voltage enhances efficiency.
  • Wide input voltage range allows flexibility in various applications.

Disadvantages

  • Limited maximum output current of 1A.
  • Requires external heat sink for high-power applications.

Working Principles

MC7812BTG is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Application Field Plans

MC7812BTG finds applications in various electronic circuits where a stable 12V power supply is required. Some common application areas include:

  1. Power Supplies: It can be used in power supply circuits to provide a regulated 12V output.
  2. Automotive Electronics: MC7812BTG is suitable for automotive applications requiring a stable voltage source.
  3. Industrial Control Systems: It can be utilized in industrial control systems to ensure a reliable power source for sensitive components.
  4. Audio Amplifiers: The regulator can be employed in audio amplifier circuits to provide a consistent voltage for optimal performance.

Alternative Models

Some alternative models to MC7812BTG are:

  1. LM7812: A widely used 12V voltage regulator with similar specifications.
  2. UA7812: Another popular 12V regulator offering comparable features.
  3. L78M12: A 12V regulator with a smaller package size, suitable for space-constrained applications.

These alternative models can be considered based on specific requirements and availability.

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প্রযুক্তিগত সমাধানে MC7812BTG এর প্রয়োগ সম্পর্কিত 10টি সাধারণ প্রশ্ন ও উত্তর তালিকাভুক্ত করুন

  1. Question: What is MC7812BTG?
    Answer: MC7812BTG is a voltage regulator integrated circuit (IC) that provides a fixed 12V output voltage.

  2. Question: What is the input voltage range for MC7812BTG?
    Answer: The input voltage range for MC7812BTG is typically between 14V and 35V.

  3. Question: Can MC7812BTG handle higher input voltages?
    Answer: No, MC7812BTG is designed to regulate voltages within the specified input voltage range. Exceeding this range may damage the IC.

  4. Question: What is the maximum current rating of MC7812BTG?
    Answer: MC7812BTG has a maximum current rating of 1A, which means it can supply up to 1A of current to the load.

  5. Question: Is MC7812BTG suitable for both AC and DC input voltages?
    Answer: Yes, MC7812BTG can handle both AC and DC input voltages as long as they fall within the specified input voltage range.

  6. Question: Can MC7812BTG be used in automotive applications?
    Answer: Yes, MC7812BTG is commonly used in automotive applications where a regulated 12V power supply is required.

  7. Question: Does MC7812BTG require any external components for operation?
    Answer: Yes, MC7812BTG requires input and output capacitors for stability and filtering purposes. These capacitors are typically recommended by the manufacturer.

  8. Question: What is the typical dropout voltage of MC7812BTG?
    Answer: The typical dropout voltage of MC7812BTG is around 2V, meaning the input voltage must be at least 2V higher than the desired output voltage for proper regulation.

  9. Question: Can MC7812BTG handle short-circuit conditions?
    Answer: MC7812BTG has built-in short-circuit protection, which means it can withstand short-circuit conditions without getting damaged. However, it is always recommended to avoid such situations.

  10. Question: Are there any alternative voltage regulators similar to MC7812BTG?
    Answer: Yes, there are several alternatives available in the market, such as LM7812, UA7812, and L78M12, which provide similar functionality and performance.