LNK6668K-TL

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - Low power consumption - High efficiency - Compact size - Wide input voltage range - Over-temperature protection - Over-voltage protection

Package: TO-220

Essence: The LNK6668K-TL is a power management integrated circuit designed for efficient power conversion in various applications.

Packaging/Quantity: The LNK6668K-TL is available in a TO-220 package and is typically sold in reels of 1000 units.

Specifications

The LNK6668K-TL has the following specifications:

• Input Voltage Range: 85V - 265V AC
• Output Voltage: 5V DC
• Output Current: Up to 1A
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +125°C
• Storage Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The LNK6668K-TL features a standard pin configuration as follows:

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for regulating output voltage
4. EN/UVLO: Enable/Undervoltage lockout control
5. BP/MODE: Burst mode operation control
6. D: Drain pin for power switching
7. S: Source pin for power switching

Functional Features

The LNK6668K-TL offers the following functional features:

1. Primary-Side Regulation (PSR) technology for accurate output voltage regulation.
2. Auto-restart protection against fault conditions such as over-temperature, over-voltage, and over-current.
3. Frequency jittering for reduced EMI emissions.
4. Built-in soft-start for controlled startup and reduced inrush current.
5. Cycle-by-cycle current limit protection.

Advantages and Disadvantages

Advantages: - High efficiency leading to energy savings. - Compact size allows for space-saving designs. - Wide input voltage range enables compatibility with various power sources. - Over-temperature and over-voltage protection ensure safe operation. - Primary-Side Regulation technology simplifies the design and reduces component count.

Disadvantages: - Limited output current capacity (up to 1A). - Not suitable for high-power applications.

Working Principles

The LNK6668K-TL utilizes a flyback topology to convert the input AC voltage to a regulated DC output voltage. It operates by switching the power transistor on and off at a high frequency, which is then transformed and rectified to provide the desired output voltage. The primary-side regulation technique ensures accurate voltage control without the need for an optocoupler or secondary-side feedback circuitry.

Detailed Application Field Plans

The LNK6668K-TL is widely used in various applications, including but not limited to:

1. Power adapters for consumer electronics.
2. LED lighting systems.
3. Industrial power supplies.
4. Home appliances.
5. Battery chargers.

Detailed and Complete Alternative Models

1. LNK6666K-TL
2. LNK6667K-TL
3. LNK6669K-TL
4. LNK6670K-TL
5. LNK6671K-TL

These alternative models offer similar functionality and specifications, providing flexibility for different design requirements.

In conclusion, the LNK6668K-TL is a power management IC that offers high efficiency, compact size, and wide input voltage range. Its primary-side regulation technology simplifies design and enhances reliability. While it has limitations in terms of output current capacity, it is widely used in various applications such as power adapters, LED lighting systems, and industrial power supplies. Alternative models are available to cater to different design needs.