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LNK458KG
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LNK458KG

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: LNK458KG is a power management IC designed for efficient and reliable power conversion in various applications.

Packaging/Quantity: The LNK458KG is typically sold in reels of 1000 units.

Specifications

  • Input Voltage Range: 85V AC to 265V AC
  • Output Voltage: 5V DC
  • Output Current: 1A
  • Operating Temperature Range: -40°C to +125°C
  • Efficiency: Up to 90%
  • Standby Power Consumption: Less than 100mW

Detailed Pin Configuration

The LNK458KG has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. DRAIN: High-voltage power MOSFET drain connection
  5. SOURCE: High-voltage power MOSFET source connection

Functional Features

  • Primary-side control eliminates the need for an optocoupler or secondary-side feedback circuitry.
  • Auto-restart protection feature ensures continuous operation even in fault conditions.
  • Frequency jittering reduces EMI emissions.
  • Built-in over-temperature, over-voltage, and over-current protection enhance system reliability.
  • Low standby power consumption meets energy-saving requirements.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power dissipation and improved energy savings. - Wide input voltage range allows for versatile application scenarios. - Integrated protection features enhance system reliability. - Primary-side control simplifies circuit design and reduces component count.

Disadvantages: - Limited output current may not be suitable for high-power applications. - Requires careful thermal management due to the TO-220 package.

Working Principles

The LNK458KG utilizes primary-side control technology to regulate the output voltage. It operates by sensing the feedback signal from the FB pin and adjusting the duty cycle of the internal power MOSFET accordingly. This control method eliminates the need for an optocoupler or secondary-side feedback circuitry, reducing cost and complexity.

The IC incorporates various protection features such as over-temperature, over-voltage, and over-current protection. In case of a fault condition, the auto-restart protection feature ensures continuous operation once the fault is resolved.

Detailed Application Field Plans

The LNK458KG is commonly used in the following applications:

  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

  1. LNK457KG: Similar specifications and features, but with a lower output current rating of 500mA.
  2. LNK459KG: Higher output current rating of 1.5A, suitable for applications requiring higher power levels.
  3. LNK460KG: Enhanced efficiency and additional protection features, ideal for energy-conscious designs.

These alternative models provide flexibility in choosing the most suitable IC based on specific application requirements.

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技術ソリューションにおける LNK458KG の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of LNK458KG in technical solutions:

  1. Q: What is LNK458KG? A: LNK458KG is a specific model of integrated offline switcher IC (integrated circuit) developed by Power Integrations.

  2. Q: What are the key features of LNK458KG? A: LNK458KG offers features like high efficiency, accurate constant current control, low standby power consumption, and comprehensive protection features.

  3. Q: What are the typical applications of LNK458KG? A: LNK458KG is commonly used in various technical solutions such as LED lighting, smart home devices, industrial controls, and consumer electronics.

  4. Q: How does LNK458KG achieve high efficiency? A: LNK458KG utilizes advanced primary-side regulation (PSR) technology, which eliminates the need for an optocoupler and secondary feedback circuitry, resulting in higher efficiency.

  5. Q: Can LNK458KG support dimming functionality for LED lighting applications? A: Yes, LNK458KG can support dimming functionality by using external components like resistors or dedicated dimming controllers.

  6. Q: Does LNK458KG have built-in protection features? A: Yes, LNK458KG incorporates various protection features such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.

  7. Q: What is the input voltage range supported by LNK458KG? A: LNK458KG supports a wide input voltage range typically from 85V AC to 265V AC, making it suitable for global applications.

  8. Q: Can LNK458KG operate in a wide temperature range? A: Yes, LNK458KG has a wide operating temperature range, typically from -40°C to +150°C, ensuring reliable performance in various environments.

  9. Q: Is LNK458KG compliant with safety standards? A: Yes, LNK458KG is designed to comply with international safety standards such as UL, CE, and IEC, ensuring safe operation in end products.

  10. Q: Are there any reference designs available for LNK458KG? A: Yes, Power Integrations provides reference designs and application notes that can help engineers implement LNK458KG in their technical solutions effectively.

Please note that the specific details and answers may vary depending on the manufacturer's documentation and application requirements.