LNK6768K

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 LNK6768K is a power management IC designed for efficient energy conversion and control in various applications.

Packaging/Quantity: The LNK6768K is available in a TO-220 package and is typically sold in reels of 1000 units.

Specifications

The LNK6768K has the following specifications:

Input Voltage Range: 85V AC to 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 LNK6768K features a standard pin configuration as follows:

VCC: Power supply input
GND: Ground reference
FB: Feedback pin for output voltage regulation
EN/UVLO: Enable/Undervoltage Lockout pin
BP/MODE: Brown-in/Brown-out or Frequency Modulation selection pin
D: Drain pin for primary side power switch
S: Source pin for primary side power switch

Functional Features

The LNK6768K offers the following functional features:

Primary-Side Control: Eliminates the need for an optocoupler and secondary-side feedback components, reducing cost and complexity.
Constant Voltage Output: Provides a stable 5V DC output voltage, suitable for a wide range of applications.
Over-Temperature Protection: Safeguards the IC from excessive heat, ensuring reliable operation.
Over-Voltage Protection: Prevents damage to connected devices by limiting the output voltage during abnormal conditions.
Over-Current Protection: Protects the IC and connected devices from excessive current flow, enhancing safety.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption and lower operating costs. - Wide input voltage range allows for compatibility with various power sources. - Integrated protection features enhance system reliability and durability. - Primary-side control simplifies circuit design and reduces component count.

Disadvantages: - Limited output current may not be suitable for high-power applications. - TO-220 package may require additional cooling measures in certain scenarios.

Working Principles

The LNK6768K utilizes primary-side control to regulate the output voltage. It operates by adjusting the duty cycle of the internal power switch based on the feedback received from the FB pin. This control method eliminates the need for a secondary-side feedback circuit, reducing cost and complexity. The IC also incorporates various protection mechanisms such as over-temperature, over-voltage, and over-current protection to ensure safe and reliable operation.

Detailed Application Field Plans

The LNK6768K is well-suited for a wide range of applications, including but not limited to:

Power Adapters: Provides efficient power conversion for various electronic devices.
LED Lighting: Enables energy-efficient and reliable LED lighting solutions.
Industrial Controls: Suitable for use in industrial automation systems and control circuits.
Home Appliances: Can be integrated into appliances such as refrigerators, air conditioners, and washing machines for efficient power management.

Detailed and Complete Alternative Models

LNK6768J: Similar specifications and features, available in a different package (SOT-223).
LNK6768M: Higher output current capability (up to 3A), suitable for more demanding applications.
LNK6768N: Lower standby power consumption, ideal for energy-sensitive applications.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van LNK6768K in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of LNK6768K in technical solutions:

Q: What is LNK6768K? A: LNK6768K is a highly integrated offline switcher IC designed for low-power applications.
Q: What are the key features of LNK6768K? A: LNK6768K features include primary-side regulation, high efficiency, accurate constant current control, and comprehensive protection features.
Q: What are the typical applications of LNK6768K? A: LNK6768K is commonly used in LED lighting, smart home devices, industrial controls, and other low-power applications.
Q: How does LNK6768K achieve primary-side regulation? A: LNK6768K uses primary-side sensing and regulation techniques, eliminating the need for an optocoupler or secondary-side feedback circuitry.
Q: Can LNK6768K support dimming functionality for LED lighting? A: Yes, LNK6768K supports both analog and PWM dimming methods, making it suitable for various LED lighting applications.
Q: Does LNK6768K have built-in protection features? A: Yes, LNK6768K includes features like over-temperature protection, output short-circuit protection, and open-loop protection to ensure safe operation.
Q: What is the efficiency range of LNK6768K? A: LNK6768K offers high efficiency up to 88%, helping to reduce power consumption and improve energy efficiency.
Q: Can LNK6768K operate in a wide input voltage range? A: Yes, LNK6768K can operate in a wide input voltage range, typically from 85VAC to 265VAC.
Q: Is LNK6768K compliant with safety standards? A: Yes, LNK6768K is designed to meet various safety standards such as UL, CE, and ENEC.
Q: Are evaluation boards available for LNK6768K? A: Yes, Power Integrations provides evaluation boards and reference designs to help engineers quickly prototype and implement solutions using LNK6768K.

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