LNK362DG

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - Low power consumption - High efficiency - Wide input voltage range - Over-temperature protection - Over-voltage protection - Under-voltage lockout - Auto-restart protection

Package: DG-8C

Essence: The LNK362DG is a power management integrated circuit designed for low power applications. It provides efficient power conversion and various protection features.

Packaging/Quantity: The LNK362DG is available in a DG-8C package, which contains one unit of the IC.

Specifications

The LNK362DG has the following specifications:

• Input Voltage Range: 85V AC to 265V AC
• Output Voltage: 5V DC
• Output Current: Up to 0.5A
• Efficiency: Up to 85%
• Operating Temperature Range: -40°C to +150°C
• Storage Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The LNK362DG has the following pin configuration:

1. VDD: Power supply input
2. BP/MODE: Bootstrap/MODE selection pin
3. FB: Feedback pin for output voltage regulation
4. GND: Ground reference
5. DRAIN: High-voltage power MOSFET drain connection
6. SOURCE: High-voltage power MOSFET source connection
7. VCC: Internal bias supply output
8. NC: No connection

Functional Features

The LNK362DG offers the following functional features:

1. Primary-Side Regulation (PSR): Eliminates the need for an optocoupler or secondary-side feedback circuitry.
2. Frequency Jittering: Reduces EMI emissions.
3. Cycle-by-Cycle Current Limiting: Provides protection against overcurrent conditions.
4. Auto-Recovery Protection: Automatically restarts the IC after a fault condition is removed.
5. Over-Temperature Protection: Safeguards the IC from excessive temperature.
6. Over-Voltage Protection: Protects the load from high voltage spikes.
7. Under-Voltage Lockout: Prevents operation when the input voltage falls below a certain threshold.

Advantages and Disadvantages

Advantages: - High efficiency power conversion - Wide input voltage range - Integrated protection features - Simplified circuit design - Cost-effective solution

Disadvantages: - Limited output current capacity (up to 0.5A) - Not suitable for high-power applications

Working Principles

The LNK362DG utilizes primary-side regulation (PSR) to achieve efficient power conversion. It operates in a flyback topology, where energy is stored in the transformer during the switch-on time and transferred to the output during the switch-off time. The feedback loop controls the duty cycle of the switching transistor to regulate the output voltage.

Detailed Application Field Plans

The LNK362DG is commonly used in low-power applications that require efficient power management. Some typical application fields include:

1. LED Lighting: Provides power conversion for LED drivers in various lighting applications.
2. Home Appliances: Used in power supplies for small household appliances such as smart devices, audio equipment, and kitchen appliances.
3. Industrial Control Systems: Enables efficient power management in industrial control systems, motor drives, and automation equipment.
4. Consumer Electronics: Suitable for power supply circuits in televisions, set-top boxes, and other consumer electronic devices.

Detailed and Complete Alternative Models

1. LNK364DG: Similar to LNK362DG but with higher output current capacity (up to 1A).
2. LNK363DG: Similar to LNK362DG but with additional features such as frequency dithering for further EMI reduction.
3. LNK361DG: Similar to LNK362DG but designed for lower power applications with reduced output current capacity (up to 0.25A).

These alternative models offer similar functionality and can be considered based on specific application requirements.

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