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NJM79M08FA
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NJM79M08FA

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: Low Dropout, Negative Output
  • Package: TO-220F
  • Essence: Monolithic 3-Terminal Regulator
  • Packaging/Quantity: Tape and Reel, 2,500 units per reel

Specifications

  • Input Voltage Range: -35V to -10V
  • Output Voltage: -8V
  • Output Current: 0.5A
  • Dropout Voltage: 1.2V (typical)
  • Quiescent Current: 5mA (typical)
  • Line Regulation: 0.05%/V (typical)
  • Load Regulation: 0.1% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NJM79M08FA has a standard TO-220F package with three pins:

  1. Input Pin (VIN): Connects to the negative input voltage.
  2. Ground Pin (GND): Connected to the ground reference.
  3. Output Pin (VOUT): Provides the regulated -8V output.

Functional Features

  • Voltage Regulation: The NJM79M08FA provides a stable -8V output voltage, even with varying input voltages.
  • Low Dropout: With a dropout voltage of only 1.2V, it can regulate the output voltage efficiently even when the input voltage is close to the desired output voltage.
  • Short Circuit Protection: The IC includes built-in protection against short circuits, preventing damage to the device.
  • Thermal Shutdown: In case of excessive heat, the regulator shuts down to prevent overheating and potential damage.

Advantages and Disadvantages

Advantages: - Compact and easy to use. - Low dropout voltage ensures efficient regulation. - Built-in protection features enhance reliability.

Disadvantages: - Limited output current capacity (0.5A). - Negative output voltage may not be suitable for all applications.

Working Principles

The NJM79M08FA is a monolithic 3-terminal regulator that uses a negative feedback loop to maintain a stable -8V output voltage. It employs a series pass transistor to regulate the output voltage by adjusting the current flow through it. The internal circuitry ensures that the output voltage remains constant despite variations in the input voltage or load conditions.

Detailed Application Field Plans

The NJM79M08FA is commonly used in various electronic devices and systems, including:

  1. Audio Amplifiers: Provides a stable negative voltage supply for audio amplification circuits.
  2. Instrumentation: Used in precision measurement equipment that requires a regulated negative voltage reference.
  3. Automotive Electronics: Suitable for automotive applications where a negative voltage source is needed, such as in lighting systems or control modules.

Detailed and Complete Alternative Models

  1. LM79M08: Similar specifications and pin configuration, offered by Texas Instruments.
  2. MC79M08: Equivalent negative voltage regulator from ON Semiconductor.
  3. KA79M08: Alternative option provided by Fairchild Semiconductor.

These alternative models offer similar functionality and can be used as substitutes for the NJM79M08FA in various applications.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av NJM79M08FA i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of NJM79M08FA in technical solutions:

  1. Q: What is NJM79M08FA? A: NJM79M08FA is a voltage regulator IC (integrated circuit) that provides a fixed output voltage of -8V.

  2. Q: What is the input voltage range for NJM79M08FA? A: The input voltage range for NJM79M08FA is typically between -10V and -35V.

  3. Q: What is the maximum output current of NJM79M08FA? A: The maximum output current of NJM79M08FA is 500mA.

  4. Q: Can NJM79M08FA be used in both AC and DC applications? A: Yes, NJM79M08FA can be used in both AC and DC applications.

  5. Q: Is NJM79M08FA suitable for automotive applications? A: No, NJM79M08FA is not specifically designed for automotive applications. It is more commonly used in general-purpose electronic circuits.

  6. Q: Does NJM79M08FA require any external components for operation? A: Yes, NJM79M08FA requires input and output capacitors for stability and filtering purposes.

  7. Q: What is the typical dropout voltage of NJM79M08FA? A: The typical dropout voltage of NJM79M08FA is around 2V.

  8. Q: Can NJM79M08FA handle short-circuit conditions? A: Yes, NJM79M08FA has built-in protection features that allow it to handle short-circuit conditions without damage.

  9. Q: Can NJM79M08FA be used in parallel to increase the output current? A: No, NJM79M08FA is not designed for parallel operation. Using multiple regulators in parallel can cause stability issues.

  10. Q: Are there any recommended heat dissipation considerations for NJM79M08FA? A: Yes, NJM79M08FA may require a heat sink or proper PCB layout to dissipate excess heat, especially when operating at higher currents or voltage differentials.

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