Microsemi Corporation
Obrázek může být reprezentace.
Viz Specifikace pro podrobnosti o produktu.
SG7812K
Zobrazit detail DataSheets

SG7812K

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Regulator
  • Characteristics: High precision, low dropout voltage, compact size
  • Package: TO-220
  • Essence: Linear regulator
  • Packaging/Quantity: Tape and reel, 1000 units per reel

Specifications

  • Input Voltage: 14V - 35V
  • Output Voltage: 12V
  • Output Current: Up to 1.5A
  • Dropout Voltage: 2V (typical)
  • Line Regulation: ±0.2% (typical)
  • Load Regulation: ±0.4% (typical)
  • Operating Temperature: -40°C to +125°C

Detailed Pin Configuration

The SG7812K has three pins:

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

Functional Features

  • Voltage Regulation: The SG7812K maintains a constant output voltage of 12V, regardless of input voltage fluctuations.
  • Low Dropout Voltage: With a dropout voltage as low as 2V, it can regulate the output voltage even when the input voltage is close to the desired output voltage.
  • High Precision: The device offers excellent line and load regulation, ensuring stable and accurate output voltage.
  • Thermal Protection: Built-in thermal shutdown protection prevents the IC from overheating under excessive loads or high ambient temperatures.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - Compact size - Thermal protection feature

Disadvantages: - Limited output current capacity (up to 1.5A) - Requires external capacitors for stability

Working Principles

The SG7812K is a linear voltage regulator that uses 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 SG7812K is commonly used in various applications, including: - Power supplies for electronic devices - Battery charging circuits - Automotive electronics - Industrial control systems - Audio amplifiers

Detailed and Complete Alternative Models

Some alternative models to the SG7812K include: - LM7812: A popular 12V linear voltage regulator from Texas Instruments. - UA7812: Another 12V linear voltage regulator from Fairchild Semiconductor. - L78S12CV: A 12V linear voltage regulator from STMicroelectronics.

These alternatives offer similar functionality and can be used as replacements for the SG7812K in various applications.

Word count: 315 words

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SG7812K v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SG7812K in technical solutions:

  1. Q: What is SG7812K? A: SG7812K is a voltage regulator IC that provides a fixed output voltage of +12V.

  2. Q: What is the input voltage range for SG7812K? A: The input voltage range for SG7812K is typically between 14V and 35V.

  3. Q: Can SG7812K handle higher input voltages? A: No, SG7812K is designed to operate within the specified input voltage range. Exceeding this range may damage the IC.

  4. Q: What is the maximum output current of SG7812K? A: The maximum output current of SG7812K is 1.5A.

  5. Q: Is SG7812K suitable for both AC and DC input voltages? A: Yes, SG7812K can accept both AC and DC input voltages.

  6. Q: Does SG7812K require any external components for operation? A: Yes, SG7812K requires input and output capacitors for stability and filtering purposes. Refer to the datasheet for recommended values.

  7. Q: Can SG7812K be used in automotive applications? A: Yes, SG7812K can be used in automotive applications as long as the input voltage range is within the specified limits.

  8. Q: What is the thermal resistance of SG7812K? A: The thermal resistance of SG7812K is typically around 50°C/W, which determines its ability to dissipate heat.

  9. Q: Can SG7812K be used in parallel to increase the output current? A: No, SG7812K is not designed to be used in parallel. Using multiple regulators in parallel can lead to instability and other issues.

  10. Q: Are there any specific precautions to consider when using SG7812K? A: Yes, it is important to ensure proper heat sinking for SG7812K to prevent overheating. Also, avoid exceeding the maximum input voltage and current limits.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's recommendations for SG7812K.