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NJM7809FA
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NJM7809FA

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Fixed Output, Positive Voltage Regulator
  • Package: TO-220
  • Essence: Monolithic integrated circuit designed to provide a constant output voltage of +9V.
  • Packaging/Quantity: Available in reels or tubes, with varying quantities depending on the supplier.

Specifications

  • Input Voltage Range: 11V to 35V
  • Output Voltage: +9V
  • Output Current: Up to 1A
  • Dropout Voltage: 2V (maximum)
  • Line Regulation: 0.2% (typical)
  • Load Regulation: 0.4% (typical)
  • Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NJM7809FA has three pins:

  1. Input Pin (VIN): Connects to the input voltage source.
  2. Ground Pin (GND): Connected to the ground reference.
  3. Output Pin (VOUT): Provides the regulated +9V output.

Functional Features

  • Voltage Regulation: The NJM7809FA maintains a constant output voltage of +9V, regardless of variations in the input voltage or load conditions.
  • Thermal Protection: Built-in thermal shutdown protection prevents the IC from overheating and ensures safe operation.
  • Short Circuit Protection: The device is equipped with internal current limiting circuitry that protects against short circuits.
  • Low Dropout Voltage: With a maximum dropout voltage of 2V, the NJM7809FA can regulate the output voltage even when the input voltage is close to the desired output voltage.

Advantages and Disadvantages

Advantages: - Simple to use and integrate into various electronic circuits. - Provides a stable and reliable +9V output voltage. - Offers protection against thermal overload and short circuits.

Disadvantages: - Limited to fixed output voltage of +9V, not adjustable. - Requires external capacitors for stability.

Working Principles

The NJM7809FA is based on the principle of linear voltage regulation. It utilizes a series pass transistor to regulate the output voltage. The input voltage is compared to a reference voltage, and the difference is amplified to control the pass transistor, ensuring a constant output voltage of +9V.

Application Field Plans

The NJM7809FA finds applications in various electronic devices and systems, including:

  1. Power Supplies: Used as a voltage regulator in power supply circuits to provide a stable +9V output.
  2. Audio Amplifiers: Provides a regulated voltage for audio amplifier circuits, ensuring consistent performance.
  3. Microcontroller Systems: Used to power microcontrollers and other digital components that require a regulated voltage.

Alternative Models

There are several alternative models available that offer similar functionality to the NJM7809FA. Some popular alternatives include:

  1. LM7809: A widely used voltage regulator IC with a fixed +9V output.
  2. MC7809: Another commonly used +9V voltage regulator IC.
  3. UA7809: A positive voltage regulator IC with a fixed +9V output.

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

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av NJM7809FA i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of NJM7809FA in technical solutions:

  1. Q: What is NJM7809FA? A: NJM7809FA is a voltage regulator IC that provides a fixed output voltage of +9V.

  2. Q: What is the input voltage range for NJM7809FA? A: The input voltage range for NJM7809FA is typically between +11V and +35V.

  3. Q: What is the maximum output current of NJM7809FA? A: The maximum output current of NJM7809FA is 1A.

  4. Q: Can NJM7809FA handle higher input voltages than +35V? A: No, it is not recommended to exceed the maximum input voltage range of +35V for NJM7809FA.

  5. Q: Is NJM7809FA suitable for both AC and DC input voltages? A: Yes, NJM7809FA can handle both AC and DC input voltages.

  6. Q: Does NJM7809FA require any external components for operation? A: Yes, NJM7809FA requires input and output capacitors for stability and filtering purposes.

  7. Q: Can NJM7809FA be used in automotive applications? A: Yes, NJM7809FA is suitable for automotive applications as long as the input voltage range is within specifications.

  8. Q: What is the typical dropout voltage of NJM7809FA? A: The typical dropout voltage of NJM7809FA is around 2V.

  9. Q: Can NJM7809FA be used in parallel to increase the output current? A: No, NJM7809FA is not designed to be used in parallel for increasing the output current.

  10. Q: Is NJM7809FA available in different package types? A: Yes, NJM7809FA is available in various package types such as TO-220, TO-252, and DPAK.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's recommendations for NJM7809FA.