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L78M12CV-DG
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L78M12CV-DG

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics:
    • Provides a fixed output voltage of 12V
    • High accuracy and low dropout voltage
    • Thermal overload protection
    • Short-circuit protection
  • Package: TO-220
  • Essence: Integrated circuit voltage regulator
  • Packaging/Quantity: Available in reels or tubes, quantity varies based on manufacturer

Specifications

  • Input Voltage Range: 14V to 35V
  • Output Voltage: 12V
  • Output Current: Up to 500mA
  • Dropout Voltage: 2V (maximum)
  • Operating Temperature Range: -40°C to +125°C
  • Line Regulation: ±0.2% (typical)
  • Load Regulation: ±0.4% (typical)

Detailed Pin Configuration

The L78M12CV-DG has three pins:

  1. Input Pin (VIN): Connects to the input voltage source.
  2. Ground Pin (GND): Connected to the ground reference of the circuit.
  3. Output Pin (VOUT): Provides the regulated output voltage.

Functional Features

  • Voltage Regulation: The L78M12CV-DG maintains a constant output voltage of 12V, regardless of changes in the input voltage or load conditions.
  • Thermal Overload Protection: The regulator includes built-in thermal shutdown circuitry that protects it from overheating.
  • Short-Circuit Protection: In case of a short circuit, the device shuts down to prevent damage to the regulator and the connected circuitry.

Advantages and Disadvantages

Advantages: - Provides a stable and regulated output voltage - High accuracy and low dropout voltage - Offers protection against thermal overload and short circuits

Disadvantages: - Limited output current capacity (up to 500mA) - Requires an input voltage within a specific range (14V to 35V)

Working Principles

The L78M12CV-DG 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 of 12V.

Detailed Application Field Plans

The L78M12CV-DG is commonly used in various electronic applications, including:

  1. Power Supplies: It can be used to provide a stable 12V supply for microcontrollers, sensors, and other components.
  2. Automotive Electronics: The regulator finds applications in automotive systems where a regulated 12V supply is required.
  3. Industrial Control Systems: It is suitable for powering control circuits and sensors in industrial automation systems.
  4. Audio Amplifiers: The regulator can be used to provide a regulated power source for audio amplifiers and other audio equipment.

Detailed and Complete Alternative Models

Some alternative models to the L78M12CV-DG include:

  1. LM7812: A popular 12V linear voltage regulator available in various packages.
  2. AMS1117-12: A low dropout voltage regulator with a fixed 12V output.
  3. LT1086: A high-current adjustable voltage regulator that can be set to provide a 12V output.

These alternatives offer similar functionality and can be used as substitutes based on specific requirements.

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技術ソリューションにおける L78M12CV-DG の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of L78M12CV-DG in technical solutions:

  1. Q: What is L78M12CV-DG? A: L78M12CV-DG is a voltage regulator IC that provides a fixed output voltage of +12V.

  2. Q: What is the input voltage range for L78M12CV-DG? A: The input voltage range for L78M12CV-DG is typically between 14V and 35V.

  3. Q: What is the maximum output current of L78M12CV-DG? A: The maximum output current of L78M12CV-DG is 500mA.

  4. Q: Can L78M12CV-DG handle higher input voltages? A: No, L78M12CV-DG is designed to operate within the specified input voltage range. Exceeding this range may damage the IC.

  5. Q: Is L78M12CV-DG suitable for both AC and DC input voltages? A: Yes, L78M12CV-DG can accept both AC and DC input voltages within the specified range.

  6. Q: Does L78M12CV-DG require any external components for operation? A: Yes, L78M12CV-DG requires input and output capacitors for stability and filtering purposes.

  7. Q: Can L78M12CV-DG be used in automotive applications? A: Yes, L78M12CV-DG is suitable for automotive applications as long as the input voltage range is within the specified limits.

  8. Q: What is the thermal resistance of L78M12CV-DG? A: The thermal resistance of L78M12CV-DG is typically around 50°C/W, which determines its ability to dissipate heat.

  9. Q: Can L78M12CV-DG be used in high-temperature environments? A: L78M12CV-DG has a maximum operating temperature of 125°C, so it can be used in moderately high-temperature environments.

  10. Q: Is L78M12CV-DG available in different package types? A: Yes, L78M12CV-DG is available in various package types such as TO-220, TO-252, and DPAK, offering flexibility for different applications.

Please note that the answers provided here are general and may vary depending on the specific datasheet and manufacturer's specifications for L78M12CV-DG.