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LNK404LG
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LNK404LG

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - Low power consumption - High efficiency - Wide input voltage range - Over-temperature protection - Over-voltage protection - Short-circuit protection

Package: SOP-7

Essence: LNK404LG is a power management IC designed for low power applications. It provides efficient power conversion and various protection features.

Packaging/Quantity: The LNK404LG is typically sold in reels containing 2500 units per reel.

Specifications

  • Input Voltage Range: 85V AC to 265V AC
  • Output Voltage: 5V DC
  • Output Current: 100mA
  • Operating Temperature Range: -40°C to +150°C
  • Efficiency: Up to 85%
  • Standby Power Consumption: Less than 50mW

Detailed Pin Configuration

The LNK404LG has the following pin configuration:

  1. VDD: Power supply input
  2. BP/MODE: Feedback input and control pin
  3. GND: Ground
  4. DRAIN: Power switch drain connection
  5. SOURCE: Power switch source connection
  6. FB: Feedback output
  7. NC: No connection

Functional Features

  • Primary-side control eliminates the need for an optocoupler or secondary-side feedback circuitry.
  • Auto-restart feature ensures continuous operation even in the event of a fault condition.
  • Frequency jittering reduces EMI emissions.
  • Cycle-by-cycle current limit provides accurate over-current protection.
  • Built-in thermal shutdown protects against excessive temperature.

Advantages and Disadvantages

Advantages: - Simplified design due to primary-side control - Enhanced reliability with built-in protection features - Reduced component count and cost - Improved energy efficiency

Disadvantages: - Limited output current capability - Not suitable for high-power applications

Working Principles

The LNK404LG utilizes primary-side control to regulate the output voltage. It senses the feedback signal through the BP/MODE pin and adjusts the duty cycle of the internal power switch accordingly. The integrated circuit operates in a quasi-resonant mode, which reduces switching losses and improves efficiency.

Detailed Application Field Plans

The LNK404LG is commonly used in low-power applications such as: - LED lighting - Standby power supplies - Home appliances - Consumer electronics

Detailed and Complete Alternative Models

  1. LNK405LG: Similar to LNK404LG but with higher output current capability (up to 200mA).
  2. LNK406LG: Enhanced version with additional protection features and wider input voltage range.
  3. LNK407LG: Suitable for higher power applications with an output current of up to 500mA.

These alternative models provide flexibility in choosing the appropriate power management IC based on specific requirements.

In conclusion, the LNK404LG is a power management IC designed for low-power applications. It offers efficient power conversion, various protection features, and simplified design due to primary-side control. While it has limitations in terms of output current capability, it provides advantages such as enhanced reliability and improved energy efficiency. The detailed pin configuration, functional features, working principles, application field plans, and alternative models make it a versatile choice for various low-power electronic devices.

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LNK404LG i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of LNK404LG in technical solutions:

  1. Q: What is LNK404LG? A: LNK404LG is a low-power, energy-efficient integrated circuit (IC) designed for offline power conversion applications.

  2. Q: What are the typical applications of LNK404LG? A: LNK404LG is commonly used in various technical solutions such as LED lighting, smart home devices, industrial controls, and consumer electronics.

  3. Q: What is the input voltage range supported by LNK404LG? A: LNK404LG supports a wide input voltage range from 85V AC to 265V AC, making it suitable for global applications.

  4. Q: Can LNK404LG be used for dimming LED lights? A: Yes, LNK404LG can be used for dimming LED lights by incorporating external components like resistors or potentiometers.

  5. Q: Does LNK404LG have built-in protection features? A: Yes, LNK404LG includes several built-in protection features such as over-temperature protection, output short-circuit protection, and open-loop protection.

  6. Q: What is the efficiency of LNK404LG? A: LNK404LG offers high efficiency, typically above 80%, which helps reduce power consumption and heat generation.

  7. Q: Can LNK404LG operate in a wide temperature range? A: Yes, LNK404LG has a wide operating temperature range of -40°C to +150°C, allowing it to function reliably in various environments.

  8. Q: Is LNK404LG compatible with both AC and DC inputs? A: No, LNK404LG is specifically designed for AC input applications and is not compatible with DC inputs.

  9. Q: Can LNK404LG be used in battery-powered devices? A: No, LNK404LG is primarily intended for line-powered applications and is not suitable for battery-powered devices.

  10. Q: Are there any reference designs available for LNK404LG? A: Yes, the manufacturer provides reference designs and application notes that can help engineers implement LNK404LG in their technical solutions effectively.

Please note that these answers are general and may vary depending on specific product specifications and application requirements.