NJR Corporation/NJRC
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NJM78M24FA
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NJM78M24FA

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics:
    • Fixed output voltage of 24V
    • Low dropout voltage
    • High ripple rejection
    • Thermal shutdown protection
  • Package: TO-220F
  • Essence: Monolithic integrated circuit
  • Packaging/Quantity: Tube packaging, 50 pieces per tube

Specifications

  • Input Voltage Range: 26V to 35V
  • Output Voltage: 24V ±4%
  • Output Current: Up to 500mA
  • Dropout Voltage: 2V (typical)
  • Ripple Rejection: 70dB (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NJM78M24FA has a standard three-pin configuration:

  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 output voltage.

Functional Features

  • Voltage Regulation: The NJM78M24FA maintains a stable output voltage of 24V regardless of variations in the input voltage or load conditions.
  • Low Dropout Voltage: The regulator operates with a low dropout voltage, minimizing power dissipation and maximizing efficiency.
  • High Ripple Rejection: It effectively filters out high-frequency noise and ripple present in the input voltage, ensuring a clean and stable output.
  • Thermal Shutdown Protection: The IC incorporates a thermal shutdown mechanism that protects it from overheating by shutting down when the temperature exceeds a safe threshold.

Advantages and Disadvantages

Advantages: - Stable and reliable voltage regulation - Low dropout voltage for efficient operation - Excellent ripple rejection capability - Built-in thermal shutdown protection

Disadvantages: - Limited output current capacity (up to 500mA) - Requires external components for proper operation (input/output capacitors)

Working Principles

The NJM78M24FA is a linear voltage regulator that utilizes a series pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The NJM78M24FA finds applications in various electronic systems where a stable 24V power supply is required. Some common application fields include:

  1. Industrial Control Systems: Used to power control circuits, sensors, and actuators in industrial automation systems.
  2. Audio Amplifiers: Provides a regulated power source for audio amplification circuits, ensuring consistent performance.
  3. Automotive Electronics: Used in automotive applications such as car audio systems, lighting controls, and engine management systems.
  4. Power Supply Modules: Integrated into power supply modules to provide a regulated voltage for other components.

Detailed and Complete Alternative Models

  1. LM7824: A popular alternative from Texas Instruments with similar specifications and pin configuration.
  2. MC78M24: Another alternative from ON Semiconductor offering comparable performance and compatibility.
  3. KA7824: An alternative from Fairchild Semiconductor with equivalent characteristics and pinout.

These alternatives can be considered based on availability, pricing, and specific requirements of the application.

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10 pirs û bersivên hevpar ên têkildarî sepana NJM78M24FA di çareseriyên teknîkî de navnîş bikin

Sure! Here are 10 common questions and answers related to the application of NJM78M24FA in technical solutions:

  1. Q: What is NJM78M24FA? A: NJM78M24FA is a voltage regulator IC that provides a fixed output voltage of +24V.

  2. Q: What is the input voltage range for NJM78M24FA? A: The input voltage range for NJM78M24FA is typically between +27V to +35V.

  3. Q: What is the maximum output current of NJM78M24FA? A: The maximum output current of NJM78M24FA is 500mA.

  4. Q: Can NJM78M24FA handle higher input voltages? A: No, NJM78M24FA is designed to operate within the specified input voltage range only. Exceeding this range may damage the IC.

  5. Q: Is NJM78M24FA suitable for both AC and DC input voltages? A: Yes, NJM78M24FA can accept both AC and DC input voltages.

  6. Q: Does NJM78M24FA require any external components for operation? A: Yes, NJM78M24FA requires input and output capacitors for stability and filtering purposes. Refer to the datasheet for recommended values.

  7. Q: Can NJM78M24FA be used in automotive applications? A: Yes, NJM78M24FA 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 NJM78M24FA? A: The thermal resistance of NJM78M24FA is typically around 50°C/W, which determines its ability to dissipate heat.

  9. Q: Can NJM78M24FA be used in parallel for higher output current? A: No, NJM78M24FA is not designed for parallel operation. Using multiple regulators in parallel may cause stability issues and uneven load sharing.

  10. Q: Is NJM78M24FA available in different package options? A: Yes, NJM78M24FA is available in various package options such as TO-220, TO-252, and TO-263, allowing flexibility in board design and mounting options.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's recommendations for NJM78M24FA.