LNK456DG-TL

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

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

Package: TO-220

Essence: LNK456DG-TL is a power management IC designed for high-efficiency offline power supplies.

Packaging/Quantity: The LNK456DG-TL is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 85V AC to 265V AC
• Output Power: Up to 10W
• Output Voltage: 5V DC
• Efficiency: >85%
• Standby Power Consumption: <100mW
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LNK456DG-TL IC has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. BP/M: Brownout protection or multi-function pin
4. FB: Feedback pin for output voltage regulation
5. DRAIN: High-voltage power MOSFET drain connection
6. SOURCE: High-voltage power MOSFET source connection

Functional Features

• Primary-side control eliminates the need for an optocoupler and secondary-side feedback components.
• Auto-restart protection feature ensures continuous operation even during fault conditions.
• Frequency jittering reduces EMI emissions.
• Built-in over-temperature, over-voltage, and over-current protection enhance system reliability.
• Accurate output voltage regulation with tight line and load regulation.

Advantages

• High efficiency leads to reduced power consumption and lower operating costs.
• Wide input voltage range allows for worldwide compatibility.
• Compact TO-220 package enables easy integration into various applications.
• Over-temperature, over-voltage, and over-current protection ensure safe operation.
• Primary-side control simplifies circuit design and reduces component count.

Disadvantages

• Limited output power of up to 10W may not be suitable for high-power applications.
• Requires careful thermal management due to the TO-220 package.

Working Principles

The LNK456DG-TL utilizes primary-side control technology to regulate the output voltage. It senses the output voltage through the feedback pin (FB) and adjusts the duty cycle of the internal power MOSFET accordingly. This eliminates the need for an optocoupler and secondary-side feedback components, reducing cost and complexity.

Detailed Application Field Plans

The LNK456DG-TL is commonly used in the following applications:

1. AC-DC power supplies for consumer electronics
2. LED lighting drivers
3. Industrial power supplies
4. Home appliances
5. Smart meters

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LNK456DG-TL include:

1. LNK457DG-TL
2. LNK458DG-TL
3. LNK459DG-TL
4. LNK460DG-TL

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

In conclusion, the LNK456DG-TL is a highly efficient power management IC designed for offline power supplies. Its primary-side control, wide input voltage range, and built-in protection features make it suitable for various applications in consumer electronics, lighting, industrial, and home appliance sectors. While it has limitations in terms of output power and thermal management, there are alternative models available within the same IC family to cater to different requirements.