LNK302DN-TL

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - Low-power offline switcher - High-voltage power conversion - Energy-efficient design - Compact size - Reliable performance

Package: SOT-223

Essence: The LNK302DN-TL is a power management IC designed for low-power offline switching applications. It offers high-voltage power conversion with energy-efficient design, making it suitable for various electronic devices.

Packaging/Quantity: The LNK302DN-TL is available in a SOT-223 package and is typically sold in reels of 2500 units.

Specifications

The LNK302DN-TL has the following specifications:

• Input Voltage Range: 85 VAC to 265 VAC
• Output Power: Up to 3 W
• Output Voltage: Configurable (based on external components)
• Frequency Range: 66 kHz to 132 kHz
• Efficiency: Up to 80%
• Operating Temperature Range: -40°C to +150°C
• Standby Power Consumption: <100 mW

Pin Configuration

The LNK302DN-TL features a 6-pin configuration:

1. VCC: Power supply input
2. BP/M: Bypass/Multifunction pin
3. FB: Feedback pin
4. DRAIN: High-voltage power MOSFET drain connection
5. SOURCE: High-voltage power MOSFET source connection
6. GND: Ground reference

Functional Features

The LNK302DN-TL offers the following functional features:

• Primary-side control eliminates the need for an optocoupler or secondary-side feedback circuitry.
• Auto-restart protection ensures continuous operation even in fault conditions.
• Accurate output voltage regulation through primary-side feedback.
• Built-in frequency jittering for reduced EMI emissions.
• Advanced line and load regulation for stable performance.

Advantages and Disadvantages

Advantages: - Simplified design due to primary-side control - Enhanced reliability with auto-restart protection - Reduced component count and cost - Improved efficiency and energy savings - Compact size for space-constrained applications

Disadvantages: - Limited output power capability (up to 3 W) - Not suitable for high-power applications - Requires external components for voltage configuration

Working Principles

The LNK302DN-TL operates on the principle of primary-side regulation. It uses a flyback topology to convert high-voltage AC input into low-voltage DC output. The IC integrates a high-voltage power MOSFET, which eliminates the need for an optocoupler or secondary-side feedback circuitry. Primary-side feedback ensures accurate output voltage regulation, while auto-restart protection enables continuous operation in fault conditions.

Detailed Application Field Plans

The LNK302DN-TL is commonly used in various low-power offline switching applications, including:

1. LED Lighting: Enables efficient power conversion for LED bulbs, downlights, and strips.
2. Home Appliances: Provides power management for small appliances like coffee makers, blenders, and toasters.
3. Consumer Electronics: Used in devices such as set-top boxes, routers, and audio systems.
4. Industrial Equipment: Suitable for low-power industrial applications like sensors, actuators, and control systems.

Detailed and Complete Alternative Models

1. LNK304DN-TL: Similar to LNK302DN-TL but offers higher output power capability (up to 5 W).
2. LNK306DN-TL: Provides enhanced features and higher output power (up to 8 W) compared to LNK302DN-TL.
3. LNK362DN-TL: Designed for higher power applications (up to 15 W) with additional protection features.

These alternative models offer increased output power and additional features, catering to a wider range of application requirements.

In conclusion, the LNK302DN-TL is a low-power offline switcher IC that provides efficient power management for various electronic devices. Its primary-side control, compact size, and reliable performance make it a popular choice in the industry. However, its limited output power capability and external component requirement should be considered when selecting this IC for specific applications.