LNK6427D-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 - Short-circuit protection

Package: ThinSOT-23-6

Essence: The LNK6427D-TL is a power management integrated circuit designed for efficient power conversion in various applications.

Packaging/Quantity: The LNK6427D-TL is available in a ThinSOT-23-6 package. It is typically sold in reels of 3000 units.

Specifications

• Input Voltage Range: 85V to 265V AC
• Output Voltage: 5V DC
• Output Current: Up to 1A
• Efficiency: Up to 85%
• Operating Temperature Range: -40°C to +125°C
• Standby Power Consumption: Less than 50mW

Detailed Pin Configuration

The LNK6427D-TL has six pins arranged as follows:

1. VDD: Power supply input pin.
2. BP/MODE: Bootstrap/MODE selection pin.
3. FB: Feedback pin for output voltage regulation.
4. GND: Ground reference pin.
5. DRAIN: High-voltage power MOSFET drain pin.
6. SOURCE: High-voltage power MOSFET source pin.

Functional Features

• Primary-side control eliminates the need for an optocoupler and secondary-side feedback components.
• Auto-restart protection feature ensures continuous operation even in the event of a fault condition.
• Frequency jittering reduces EMI emissions, enabling compliance with international standards.
• Built-in over-temperature, over-voltage, and short-circuit protection enhance system reliability.
• Low standby power consumption improves energy efficiency.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Compact size allows for space-saving designs. - Wide input voltage range enables compatibility with various power sources. - Integrated protection features enhance system reliability. - Primary-side control simplifies circuit design and reduces component count.

Disadvantages: - Limited output current may not be suitable for high-power applications. - Requires careful thermal management due to the compact package size.

Working Principles

The LNK6427D-TL utilizes primary-side control, where the controller operates directly from the primary side of the transformer. This eliminates the need for an optocoupler and secondary-side feedback components, reducing cost and complexity. The IC regulates the output voltage by adjusting the duty cycle of the internal power MOSFET based on the feedback signal received from the FB pin.

Detailed Application Field Plans

The LNK6427D-TL is widely used in various applications, including but not limited to: - Power adapters - LED lighting - Home appliances - Industrial equipment - Consumer electronics

Detailed and Complete Alternative Models

1. LNK6428D-TL
2. LNK6429D-TL
3. LNK6430D-TL
4. LNK6431D-TL
5. LNK6432D-TL

These alternative models offer similar functionality and characteristics, providing flexibility in design choices.

In conclusion, the LNK6427D-TL is a versatile power management IC that offers high efficiency, compact size, and integrated protection features. Its primary-side control and wide input voltage range make it suitable for various applications. While it has limitations in terms of output current and thermal management, it provides significant advantages in terms of simplicity, reliability, and energy efficiency.