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L78M15CV-DG
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L78M15CV-DG

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics:
    • Fixed output voltage of 15V
    • Maximum output current of 500mA
    • Low dropout voltage
    • Thermal overload protection
  • Package: TO-220
  • Essence: Integrated circuit voltage regulator
  • Packaging/Quantity: Available in reels or tubes, quantity depends on supplier

Specifications

  • Input Voltage Range: 17V to 35V
  • Output Voltage: 15V ±4%
  • Output Current: Up to 500mA
  • Dropout Voltage: 2V (typical)
  • Line Regulation: 0.04% (typical)
  • Load Regulation: 0.1% (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78M15CV-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

  • Regulates and stabilizes the output voltage within a specified range.
  • Provides thermal overload protection to prevent damage due to excessive heat.
  • Low dropout voltage ensures efficient operation even with low input-output voltage differentials.
  • Offers excellent line and load regulation for consistent performance.

Advantages and Disadvantages

Advantages: - Easy to use and integrate into electronic circuits. - Compact size and lightweight. - Wide operating temperature range. - Reliable and durable.

Disadvantages: - Fixed output voltage may not be suitable for all applications. - Limited output current capacity. - Requires external capacitors for stability.

Working Principles

The L78M15CV-DG is a linear voltage regulator that uses a series pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage and adjusting the pass transistor accordingly. This ensures a stable output voltage despite variations in input voltage or load conditions.

Detailed Application Field Plans

The L78M15CV-DG is commonly used in various electronic applications, including:

  1. Power supply circuits for microcontrollers and other digital ICs.
  2. Audio amplifiers and preamplifiers.
  3. Battery charging circuits.
  4. Industrial control systems.
  5. Automotive electronics.
  6. LED lighting applications.

Detailed and Complete Alternative Models

  1. LM7815: Similar specifications and pin configuration, available in different packages.
  2. MC7815: Equivalent voltage regulator with similar characteristics.
  3. UA7815: Another alternative with comparable performance.

These alternative models can be used as substitutes for the L78M15CV-DG depending on specific requirements and availability.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L78M15CV-DG v technických řešeních

Sure! Here are 10 common questions and answers related to the application of L78M15CV-DG in technical solutions:

  1. Q: What is L78M15CV-DG? A: L78M15CV-DG is a voltage regulator IC that provides a fixed output voltage of +15V.

  2. Q: What is the input voltage range for L78M15CV-DG? A: The input voltage range for L78M15CV-DG is typically between 17V and 35V.

  3. Q: What is the maximum output current of L78M15CV-DG? A: The maximum output current of L78M15CV-DG is 500mA.

  4. Q: Can L78M15CV-DG handle higher input voltages than its rated output voltage? A: No, L78M15CV-DG is designed to regulate the output voltage at +15V, and exceeding the input voltage beyond the specified range may damage the IC.

  5. Q: Is L78M15CV-DG suitable for both AC and DC input voltages? A: Yes, L78M15CV-DG can handle both AC and DC input voltages within the specified range.

  6. Q: Does L78M15CV-DG require any external components for operation? A: Yes, L78M15CV-DG requires input and output capacitors for stability and filtering purposes. Refer to the datasheet for recommended values.

  7. Q: Can L78M15CV-DG be used in automotive applications? A: Yes, L78M15CV-DG is suitable for automotive applications as it can handle the required input voltage range and has built-in protection features.

  8. Q: What is the thermal resistance of L78M15CV-DG? A: The thermal resistance of L78M15CV-DG is typically around 50°C/W, which determines its ability to dissipate heat.

  9. Q: Can L78M15CV-DG be used in high-temperature environments? A: L78M15CV-DG has a maximum operating temperature of 125°C, so it can be used in moderately high-temperature environments.

  10. Q: Are there any alternative voltage regulator ICs similar to L78M15CV-DG? A: Yes, there are other voltage regulator ICs available with different output voltages and specifications. Some alternatives include LM7805 (5V), LM7812 (12V), and LM317 (adjustable).