Power Integrations
Gambar mungkin merupakan representasi.
Lihat spesifikasi untuk detail produk.
LNK457KG
Lihat Detail Lembar Data

LNK457KG

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency - Low standby power consumption - Wide input voltage range - Over-temperature protection - Over-voltage protection - Over-current protection

Package: TO-220

Essence: LNK457KG is a power management IC designed for efficient power conversion and control.

Packaging/Quantity: The LNK457KG is typically packaged in a TO-220 package and is available in various quantities.

Specifications

The specifications of the LNK457KG include:

  • Input Voltage Range: 85VAC to 265VAC
  • Output Voltage: 5VDC
  • Output Current: 1A
  • Efficiency: >80%
  • Standby Power Consumption: <100mW
  • Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LNK457KG has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for voltage regulation
  4. EN/UVLO: Enable/Undervoltage lockout pin
  5. BP/MODE: Brown-in/Brown-out or Frequency selection pin
  6. D: Drain pin for primary-side MOSFET
  7. S: Source pin for primary-side MOSFET
  8. NC: No connection

Functional Features

The LNK457KG offers the following functional features:

  • Primary-side control eliminates the need for an optocoupler and secondary-side feedback circuitry.
  • Auto-restart protection feature ensures continuous operation in fault conditions.
  • Frequency jittering reduces EMI emissions.
  • Built-in over-temperature, over-voltage, and over-current protection enhance system reliability.
  • Low standby power consumption meets energy-saving requirements.

Advantages and Disadvantages

Advantages: - High efficiency power conversion - Simplified circuit design due to primary-side control - Enhanced system reliability with built-in protection features - Wide input voltage range allows for versatile applications

Disadvantages: - Limited output current capability (1A) - Restricted output voltage options (5VDC)

Working Principles

The LNK457KG utilizes a primary-side control technique to regulate the output voltage. It operates by adjusting the duty cycle of the primary-side MOSFET based on the feedback received from the FB pin. This eliminates the need for an optocoupler and secondary-side feedback circuitry, simplifying the overall circuit design.

The IC incorporates various protection features such as over-temperature, over-voltage, and over-current protection. In fault conditions, the auto-restart protection feature ensures continuous operation once the fault is resolved.

Detailed Application Field Plans

The LNK457KG is suitable for a wide range of applications including:

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

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LNK457KG include:

  1. LNK456KG
  2. LNK458KG
  3. LNK459KG
  4. LNK460KG

These models are part of the same product family and provide different output voltage and current options to cater to diverse application requirements.

In conclusion, the LNK457KG is a power management IC that offers high efficiency, low standby power consumption, and various protection features. Its primary-side control technique simplifies circuit design while ensuring reliable performance. With its wide input voltage range and versatile applications, it is a suitable choice for various power supply needs in consumer electronics, lighting systems, industrial automation, and more.

Sebutkan 10 pertanyaan dan jawaban umum terkait penerapan LNK457KG dalam solusi teknis

Sure! Here are 10 common questions and answers related to the application of LNK457KG in technical solutions:

  1. Q: What is LNK457KG? A: LNK457KG is a specific model or variant of a power management integrated circuit (IC) developed by Power Integrations.

  2. Q: What are the key features of LNK457KG? A: LNK457KG offers features like high efficiency, low standby power consumption, built-in protection mechanisms, and compatibility with various applications.

  3. Q: What are the typical applications of LNK457KG? A: LNK457KG is commonly used in applications such as LED lighting, smart home devices, industrial controls, consumer electronics, and power supplies.

  4. Q: How does LNK457KG help in LED lighting applications? A: LNK457KG provides efficient power conversion, dimming control, and protection features that make it suitable for driving LEDs in lighting systems.

  5. Q: Can LNK457KG be used in battery-powered devices? A: Yes, LNK457KG can be used in battery-powered devices as it has low standby power consumption and supports energy-efficient operation.

  6. Q: Does LNK457KG have built-in protection features? A: Yes, LNK457KG incorporates various protection mechanisms like overvoltage protection, overcurrent protection, and thermal shutdown to ensure safe operation.

  7. Q: Is LNK457KG compatible with different input voltage levels? A: Yes, LNK457KG has a wide input voltage range, typically from 85V AC to 265V AC, making it compatible with various power sources worldwide.

  8. Q: Can LNK457KG be used in high-power applications? A: LNK457KG is designed for low to medium power applications, typically up to 25W. For higher power requirements, other ICs may be more suitable.

  9. Q: Are there any design resources available for LNK457KG? A: Yes, Power Integrations provides datasheets, application notes, and reference designs that can help in designing with LNK457KG.

  10. Q: Where can I purchase LNK457KG? A: LNK457KG can be purchased from authorized distributors of Power Integrations or through online electronic component suppliers.

Please note that the specific details and answers may vary depending on the manufacturer's documentation and application requirements.