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L78L12ACD
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L78L12ACD

Product Overview

  • Category: Voltage Regulator
  • Use: To regulate and stabilize the output voltage in electronic circuits
  • Characteristics: Low dropout voltage, high current capability, thermal overload protection
  • Package: TO-252 (DPAK)
  • Essence: Integrated circuit voltage regulator
  • Packaging/Quantity: Available in reels of 2,500 units

Specifications

  • Input Voltage Range: 14V to 35V
  • Output Voltage: 12V
  • Output Current: Up to 100mA
  • Dropout Voltage: 2V (maximum)
  • Quiescent Current: 5mA (typical)
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The L78L12ACD voltage regulator has three pins:

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

Functional Features

  • Voltage Regulation: The L78L12ACD maintains a constant output voltage of 12V, regardless of variations in the input voltage or load conditions.
  • Low Dropout Voltage: The regulator can operate with a very small voltage difference between the input and output, minimizing power dissipation.
  • High Current Capability: Capable of delivering up to 100mA of output current.
  • Thermal Overload Protection: Built-in protection mechanism that prevents the device from overheating under excessive loads or high ambient temperatures.

Advantages and Disadvantages

Advantages: - Simple and compact design - Easy to use and integrate into various electronic circuits - Reliable voltage regulation - Thermal protection ensures device longevity

Disadvantages: - Limited output current capability - Dropout voltage may affect efficiency in low input voltage scenarios

Working Principles

The L78L12ACD 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 stable output voltage.

Detailed Application Field Plans

The L78L12ACD voltage regulator finds applications in various electronic devices, including but not limited to:

  1. Power supplies for microcontrollers and digital circuits
  2. Battery-powered devices requiring a stable 12V supply
  3. Automotive electronics
  4. Audio amplifiers and preamplifiers
  5. Industrial control systems

Detailed and Complete Alternative Models

  1. LM7805: 5V voltage regulator with similar characteristics
  2. LM317: Adjustable voltage regulator capable of providing different output voltages
  3. LT1086: High-current adjustable voltage regulator with thermal overload protection

These alternative models offer different output voltages or additional features, providing flexibility for various circuit requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací L78L12ACD v technických řešeních

Sure! Here are 10 common questions and answers related to the application of L78L12ACD in technical solutions:

  1. Q: What is L78L12ACD? A: L78L12ACD is a voltage regulator IC that provides a fixed output voltage of +12V.

  2. Q: What is the input voltage range for L78L12ACD? A: The input voltage range for L78L12ACD is typically between 14V and 35V.

  3. Q: What is the maximum output current of L78L12ACD? A: The maximum output current of L78L12ACD is 100mA.

  4. Q: Can L78L12ACD handle higher input voltages than its specified range? A: No, exceeding the specified input voltage range can damage the IC.

  5. Q: Is L78L12ACD suitable for both AC and DC input voltages? A: Yes, L78L12ACD can handle both AC and DC input voltages.

  6. Q: Can L78L12ACD be used to regulate voltages other than +12V? A: No, L78L12ACD is specifically designed to provide a fixed output voltage of +12V.

  7. Q: Does L78L12ACD require any external components for operation? A: Yes, L78L12ACD requires input and output capacitors for stability and filtering.

  8. Q: What is the typical dropout voltage of L78L12ACD? A: The typical dropout voltage of L78L12ACD is around 2V.

  9. Q: Can L78L12ACD handle short-circuit conditions on the output? A: No, L78L12ACD should be protected from short-circuits to prevent damage.

  10. Q: Is L78L12ACD suitable for high-power applications? A: No, L78L12ACD is designed for low-power applications and may not be suitable for high-power requirements.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer recommendations for L78L12ACD.