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TOP254EN
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TOP254EN

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High-performance offline switcher, energy-efficient, compact design
  • Package: TO-220-7C
  • Essence: Power Integrations' TOPSwitch technology
  • Packaging/Quantity: Tray, 50 pieces per tray

Specifications

  • Input Voltage Range: 85 VAC to 265 VAC
  • Output Power: Up to 30 W
  • Frequency: 132 kHz
  • Operating Temperature Range: -40°C to +150°C
  • Efficiency: Up to 88%
  • Protection Features: Overload protection, overvoltage protection, thermal shutdown, auto-restart

Detailed Pin Configuration

  1. Drain
  2. Source
  3. Feedback
  4. Ground
  5. Control
  6. Output
  7. Sense

Functional Features

  • Integrated high-voltage power MOSFET
  • Advanced current limit and line feed-forward compensation
  • Frequency jittering for low EMI
  • Auto-restart protection for fault conditions
  • Accurate constant output current control
  • Built-in soft-start for reduced stress during startup

Advantages and Disadvantages

Advantages: - High efficiency leads to energy savings - Compact design saves space - Wide input voltage range allows for universal use - Comprehensive protection features ensure system reliability - Easy integration into various power management applications

Disadvantages: - Limited output power compared to higher-rated devices - Requires external components for complete power supply implementation

Working Principles

The TOP254EN is based on Power Integrations' TOPSwitch technology, which combines a high-voltage power MOSFET with a controller IC in a single package. It operates by converting the input AC voltage to a high-frequency AC signal, which is then rectified and filtered to provide a regulated DC output voltage. The integrated controller IC ensures efficient power conversion and provides various protection features.

Detailed Application Field Plans

The TOP254EN is widely used in various power management applications, including but not limited to: - Power supplies for consumer electronics - LED lighting systems - Industrial controls and automation - Home appliances - Telecommunications equipment

Detailed and Complete Alternative Models

  • TOP250YN: Similar specifications, different package (PDIP-8)
  • TOP255PN: Higher output power (up to 50 W), similar specifications, different package (TO-220-7C)
  • TOP256EN: Higher output power (up to 40 W), similar specifications, different package (TO-220-7C)

Note: This is not an exhaustive list of alternative models. Please refer to the manufacturer's documentation for a complete list.

This entry provides an overview of the TOP254EN, including its product category, use, characteristics, package, essence, packaging/quantity information. It also includes detailed specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací TOP254EN v technických řešeních

Sure! Here are 10 common questions and answers related to the application of TOP254EN in technical solutions:

  1. Q: What is TOP254EN?
    A: TOP254EN is a highly integrated offline switcher IC (integrated circuit) designed for low-power applications.

  2. Q: What are the typical applications of TOP254EN?
    A: TOP254EN is commonly used in power supplies for appliances, LED lighting, industrial controls, and other low-power systems.

  3. Q: What is the input voltage range supported by TOP254EN?
    A: TOP254EN supports an input voltage range of 85VAC to 265VAC, making it suitable for worldwide use.

  4. Q: Can TOP254EN handle high-voltage spikes or surges?
    A: Yes, TOP254EN has built-in protection features like line undervoltage lockout (UVLO) and overvoltage protection (OVP) to handle such events.

  5. Q: Does TOP254EN require an external MOSFET?
    A: No, TOP254EN integrates a high-voltage power MOSFET, eliminating the need for an external one.

  6. Q: What is the maximum output power that TOP254EN can deliver?
    A: TOP254EN can deliver up to 30 watts of output power, depending on the specific application and design considerations.

  7. Q: Is TOP254EN suitable for dimmable LED lighting applications?
    A: Yes, TOP254EN can be used in dimmable LED lighting applications with appropriate external circuitry.

  8. Q: Does TOP254EN have any built-in protection against overcurrent?
    A: Yes, TOP254EN includes cycle-by-cycle current limit protection to prevent excessive current flow.

  9. Q: Can TOP254EN operate in a wide temperature range?
    A: Yes, TOP254EN is designed to operate reliably in a temperature range of -40°C to 150°C.

  10. Q: Are there any evaluation boards or reference designs available for TOP254EN?
    A: Yes, Power Integrations, the manufacturer of TOP254EN, provides evaluation boards and reference designs to help engineers implement the IC in their applications.

Please note that these answers are general and may vary depending on specific design requirements and application considerations.