LNK305DN

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

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

Package: DIP-7 (Dual In-line Package)

Essence: LNK305DN is a power management IC designed for low-power applications. It provides efficient power conversion and protection features.

Packaging/Quantity: LNK305DN is typically sold in reels of 2500 units.

Specifications

Input Voltage Range: 85V to 265V AC
Output Voltage: 5V DC
Output Current: Up to 100mA
Operating Temperature Range: -40°C to +150°C
Efficiency: Up to 80%
Standby Power Consumption: Less than 50mW

Pin Configuration

LNK305DN has the following pin configuration:

VDD - Power supply input
BP/MODE - Feedback and control pin
FB - Feedback pin
GND - Ground
DRAIN - Power switch drain
SOURCE - Power switch source
NC - No connection

Functional Features

Primary-side regulation (PSR) eliminates the need for an optocoupler or secondary-side feedback circuitry.
Auto-restart feature protects against output short circuits and over-temperature conditions.
Frequency jittering reduces EMI emissions.
Built-in line undervoltage lockout (UVLO) ensures reliable operation under varying input voltages.
Cycle-by-cycle current limit provides accurate current regulation.

Advantages and Disadvantages

Advantages: - Compact size and low component count - High efficiency leads to energy savings - Robust protection features enhance system reliability - Simplified design due to primary-side regulation

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

Working Principles

LNK305DN utilizes a flyback topology to convert the input AC voltage to a regulated DC output. The primary-side regulation eliminates the need for an optocoupler, reducing cost and complexity. The IC controls the power switch based on feedback received from the output voltage, ensuring stable and efficient operation.

Detailed Application Field Plans

LNK305DN is commonly used in low-power applications such as: - LED lighting systems - Standby power supplies - Home appliances - Industrial control systems

Alternative Models

Some alternative models that offer similar functionality to LNK305DN include: - LNK302DN - LNK304DN - LNK306DN

These models have slightly different specifications but can be used as substitutes depending on the specific requirements of the application.

In conclusion, LNK305DN is a power management IC designed for low-power applications. It offers efficient power conversion, protection features, and primary-side regulation. With its compact size and robust functionality, it finds applications in various industries such as LED lighting, standby power supplies, and home appliances.

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LNK305DN v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LNK305DN in technical solutions:

Q: What is LNK305DN? A: LNK305DN is an integrated offline switcher IC designed for low-power applications, providing primary-side regulation without the need for an optocoupler.
Q: What are the typical applications of LNK305DN? A: LNK305DN is commonly used in applications such as LED lighting, smart home devices, industrial controls, and consumer electronics.
Q: How does LNK305DN provide primary-side regulation? A: LNK305DN uses a proprietary algorithm called EcoSmart™ to regulate the output voltage by adjusting the duty cycle of the internal power MOSFET.
Q: What is the maximum input voltage supported by LNK305DN? A: The maximum input voltage supported by LNK305DN is typically 550V DC or 400V AC.
Q: Can LNK305DN be used in dimmable LED lighting applications? A: Yes, LNK305DN can be used in dimmable LED lighting applications by incorporating external components for dimming control.
Q: Does LNK305DN have built-in protection features? A: Yes, LNK305DN includes various protection features like thermal shutdown, output short-circuit protection, and open-loop protection.
Q: What is the efficiency of LNK305DN? A: LNK305DN offers high efficiency, typically up to 85%, which helps reduce power dissipation and improve overall system performance.
Q: Can LNK305DN operate in a wide temperature range? A: Yes, LNK305DN is designed to operate reliably in a wide temperature range, typically from -40°C to 150°C.
Q: What is the maximum output power that LNK305DN can handle? A: The maximum output power that LNK305DN can handle depends on the specific application and thermal design considerations. It is recommended to refer to the datasheet for detailed information.
Q: Are there any reference designs available for LNK305DN? A: Yes, Power Integrations provides reference designs and application notes for various applications using LNK305DN, which can be helpful in designing with this IC.

Please note that these answers are general and may vary depending on the specific implementation and requirements of your technical solution.