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NJM7820FA
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NJM7820FA

Product Overview

Category

NJM7820FA belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used as a voltage regulator in electronic circuits.

Characteristics

  • Voltage regulation: NJM7820FA provides a regulated output voltage of -20V.
  • High efficiency: The IC operates with high efficiency, minimizing power loss.
  • Low dropout voltage: It has a low dropout voltage, ensuring stable performance even when the input voltage is close to the output voltage.
  • Thermal shutdown protection: The IC incorporates thermal shutdown protection to prevent damage due to excessive heat.
  • Short-circuit protection: NJM7820FA includes short-circuit protection to safeguard against potential circuit failures.

Package

NJM7820FA is available in a TO-220 package, which ensures easy installation and heat dissipation.

Essence

The essence of NJM7820FA lies in its ability to regulate voltage effectively, providing a stable -20V output.

Packaging/Quantity

This IC is typically packaged in reels or tubes, with each reel/tube containing a specific quantity of NJM7820FA units. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

  • Input Voltage Range: 24V to 40V
  • Output Voltage: -20V
  • Output Current: Up to 1A
  • Dropout Voltage: 2V (maximum)
  • Operating Temperature Range: -40°C to +125°C
  • Quiescent Current: 10mA (typical)

Pin Configuration

The NJM7820FA IC features a standard three-pin configuration:

  1. Input Pin (VIN): This pin is connected to the input voltage source.
  2. Ground Pin (GND): This pin is connected to the ground reference.
  3. Output Pin (VOUT): This pin provides the regulated -20V output voltage.

Functional Features

  • Voltage Regulation: NJM7820FA ensures a stable -20V output voltage, regardless of input voltage fluctuations.
  • Overcurrent Protection: The IC incorporates overcurrent protection to prevent damage in case of excessive load current.
  • Thermal Shutdown: In the event of excessive heat, the IC shuts down to protect itself from thermal damage.
  • Short-Circuit Protection: NJM7820FA includes short-circuit protection to safeguard against potential circuit failures caused by short circuits.

Advantages and Disadvantages

Advantages

  • Efficient voltage regulation
  • Low dropout voltage
  • Thermal and short-circuit protection
  • Easy installation with TO-220 package

Disadvantages

  • Limited output current capacity (up to 1A)

Working Principles

NJM7820FA operates based on the principle of linear voltage regulation. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain a stable -20V output. By continuously monitoring the output voltage, the IC compensates for any variations in the input voltage to ensure a consistent regulated output.

Detailed Application Field Plans

NJM7820FA finds applications in various electronic systems where a stable -20V voltage source is required. Some common application fields include: - Power supply units - Audio amplifiers - Industrial control systems - Instrumentation equipment - Automotive electronics

Detailed and Complete Alternative Models

  • LM7820: Manufactured by Texas Instruments, this IC offers similar voltage regulation capabilities as NJM7820FA.
  • MC7820: Produced by ON Semiconductor, MC7820 is another alternative that provides -20V voltage regulation.

These alternative models can be considered as substitutes for NJM7820FA, depending on specific requirements and availability.

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Énumérez 10 questions et réponses courantes liées à l'application de NJM7820FA dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of NJM7820FA in technical solutions:

  1. Q: What is NJM7820FA? A: NJM7820FA is a voltage regulator IC that provides a fixed output voltage of 20V.

  2. Q: What is the input voltage range for NJM7820FA? A: The input voltage range for NJM7820FA is typically between 24V and 40V.

  3. Q: What is the maximum output current of NJM7820FA? A: The maximum output current of NJM7820FA is 1A.

  4. Q: Can NJM7820FA handle higher input voltages than its specified range? A: No, it is not recommended to exceed the specified input voltage range as it may damage the IC.

  5. Q: Is NJM7820FA suitable for both AC and DC input voltages? A: Yes, NJM7820FA can handle both AC and DC input voltages.

  6. Q: Does NJM7820FA require any external components for operation? A: Yes, NJM7820FA requires input and output capacitors for stability and filtering purposes.

  7. Q: Can NJM7820FA be used in automotive applications? A: Yes, NJM7820FA is suitable for automotive applications as long as the input voltage range is within specifications.

  8. Q: What is the typical dropout voltage of NJM7820FA? A: The typical dropout voltage of NJM7820FA is around 2V.

  9. Q: Can NJM7820FA be used in parallel to increase the output current? A: No, NJM7820FA is not designed to be used in parallel. Using multiple ICs in parallel may cause stability issues.

  10. Q: What are the typical applications of NJM7820FA? A: NJM7820FA is commonly used in various electronic devices and circuits that require a stable 20V power supply, such as audio amplifiers, industrial control systems, and instrumentation equipment.

Please note that these answers are general and may vary depending on specific datasheet specifications and application requirements.