LNK4022S-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 - Short-circuit protection

Package: SOT-223

Essence: The LNK4022S-TL is a power management IC designed for efficient energy conversion and regulation in various electronic devices.

Packaging/Quantity: The LNK4022S-TL is available in a standard SOT-223 package. It is typically sold in reels containing 2500 units.

Specifications

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

Detailed Pin Configuration

The LNK4022S-TL features a 4-pin configuration:

1. Pin 1 (Vcc): This pin is used to supply power to the IC. It is connected to the positive terminal of the input voltage source.
2. Pin 2 (GND): This pin is the ground reference for the IC. It is connected to the negative terminal of the input voltage source.
3. Pin 3 (FB): This pin is used to provide feedback to the IC for regulating the output voltage. It is connected to a resistive voltage divider network.
4. Pin 4 (Drain): This pin is connected to the drain of the internal MOSFET switch. It is responsible for switching the input voltage to the output side.

Functional Features

• Integrated high-voltage power MOSFET
• Frequency jittering for reduced EMI emissions
• Auto-restart protection for fault conditions
• Cycle-by-cycle current limit
• Built-in soft-start for controlled startup

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 - Over-temperature and short-circuit protection enhance safety and reliability

Disadvantages: - Limited output current capacity (up to 1A) - Requires external components for proper operation - Not suitable for high-power applications

Working Principles

The LNK4022S-TL utilizes a flyback topology to convert the high input voltage to a regulated low output voltage. It incorporates a high-voltage power MOSFET that switches the input voltage across the primary winding of the transformer. The energy is then transferred to the secondary side, rectified, and filtered to obtain the desired output voltage.

The IC employs frequency jittering to minimize electromagnetic interference (EMI) emissions. It also features auto-restart protection, which ensures continuous operation by automatically recovering from fault conditions such as overvoltage or overcurrent events.

Detailed Application Field Plans

The LNK4022S-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. LNK4024S-TL

   • Similar specifications and pin configuration
   • Higher output current capacity (up to 2A)

2. LNK4026S-TL

   • Similar specifications and pin configuration
   • Higher output voltage (up to 12V DC)

3. LNK4028S-TL

   • Similar specifications and pin configuration
   • Higher efficiency (up to 90%)

4. LNK4030S-TL

   • Similar specifications and pin configuration
   • Lower input voltage range (60V - 265V AC)

These alternative models provide options with varying capabilities to suit different application requirements.

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