Power Integrations
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LNK6779K
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LNK6779K

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency - Low standby power consumption - Wide input voltage range - Over-temperature protection - Over-voltage protection - Over-current protection

Package: TO-220

Essence: The LNK6779K is a power management integrated circuit designed to provide efficient and reliable power conversion for various applications.

Packaging/Quantity: The LNK6779K is available in a TO-220 package and is typically sold in reels of 1000 units.

Specifications

The LNK6779K has the following specifications:

  • Input Voltage Range: 85V - 265V AC
  • Output Voltage: 5V DC
  • Output Current: Up to 2A
  • Efficiency: Up to 90%
  • Standby Power Consumption: Less than 50mW
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LNK6779K has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. EN/UVLO: Enable/Undervoltage Lockout pin
  5. BP/MODE: Brown-in/Brown-out or Frequency Modulation pin
  6. DRAIN: High-voltage power MOSFET drain connection
  7. SOURCE: High-voltage power MOSFET source connection

Functional Features

The LNK6779K offers the following functional features:

  • Primary-side control eliminates the need for an optocoupler and secondary-side feedback components, reducing cost and complexity.
  • Auto-restart protection feature ensures continuous operation even in the event of a fault condition.
  • Frequency jittering reduces EMI emissions, enabling compliance with international standards.
  • Advanced line and load regulation ensures stable output voltage under varying input and load conditions.
  • Built-in protection features such as over-temperature, over-voltage, and over-current protection enhance system reliability.

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings and reduced power consumption. - Wide input voltage range allows for universal compatibility. - Integrated protection features enhance system reliability. - Primary-side control simplifies circuit design and reduces component count. - Auto-restart protection ensures continuous operation.

Disadvantages: - Limited output current may not be suitable for high-power applications. - TO-220 package may require additional heat sinking for certain operating conditions.

Working Principles

The LNK6779K utilizes primary-side control to regulate the output voltage. It operates by modulating the duty cycle of the internal power MOSFET based on the feedback received from the FB pin. The integrated circuit continuously monitors the output voltage and adjusts the duty cycle to maintain a stable output voltage despite variations in input voltage and load conditions.

Detailed Application Field Plans

The LNK6779K is commonly used in various applications, including but not limited to:

  1. Power supplies for consumer electronics
  2. LED lighting systems
  3. Industrial automation equipment
  4. Home appliances
  5. Battery chargers

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LNK6779K include:

  1. LNK6779J
  2. LNK6779L
  3. LNK6779M
  4. LNK6779N

These alternative models are part of the same product family and provide comparable performance and features.

In conclusion, the LNK6779K is a power management IC that offers high efficiency, wide input voltage range, and integrated protection features. Its primary-side control and compact TO-220 package make it suitable for various applications. However, it is important to consider the limited output current and potential heat dissipation requirements when using this IC.

Перечислите 10 распространенных вопросов и ответов, связанных с применением LNK6779K в технических решениях.

Sure! Here are 10 common questions and answers related to the application of LNK6779K in technical solutions:

  1. Q: What is LNK6779K? A: LNK6779K is a highly integrated, offline switcher IC designed for low-power applications.

  2. Q: What are the key features of LNK6779K? A: The key features of LNK6779K include primary-side regulation, high efficiency, accurate constant current control, and comprehensive protection features.

  3. Q: What are the typical applications of LNK6779K? A: LNK6779K is commonly used in LED lighting, smart home devices, industrial controls, and other low-power applications.

  4. Q: How does LNK6779K achieve primary-side regulation? A: LNK6779K uses primary-side sensing and regulation techniques, eliminating the need for an optocoupler or secondary-side feedback circuitry.

  5. Q: Can LNK6779K operate in a wide input voltage range? A: Yes, LNK6779K can operate in a wide input voltage range, typically from 85VAC to 265VAC.

  6. Q: Does LNK6779K support dimming functionality for LED lighting applications? A: Yes, LNK6779K supports both analog and PWM dimming methods for LED lighting applications.

  7. Q: What is the efficiency of LNK6779K? A: LNK6779K offers high efficiency, typically up to 88%, which helps reduce power consumption and heat dissipation.

  8. Q: What protection features are included in LNK6779K? A: LNK6779K includes protection features such as output overvoltage protection, output short-circuit protection, and thermal shutdown.

  9. Q: Can LNK6779K be used in offline flyback or buck-boost converter topologies? A: Yes, LNK6779K can be used in both offline flyback and buck-boost converter topologies, providing flexibility in design.

  10. Q: Is LNK6779K compliant with safety standards and regulations? A: Yes, LNK6779K is designed to meet various safety standards such as UL, EN, and IEC, ensuring reliable and safe operation in technical solutions.

Please note that the answers provided here are general and may vary depending on specific application requirements and design considerations.