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TOP254EG
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TOP254EG

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High efficiency, low standby power, compact size
  • Package: TO-220
  • Essence: Switching Power Supply Controller
  • Packaging/Quantity: Tray, 100 pieces per tray

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 45W
  • Frequency Range: 50Hz to 60Hz
  • Operating Temperature: -40°C to +150°C
  • Standby Power Consumption: Less than 30mW

Detailed Pin Configuration

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for voltage regulation
  4. COMP: Compensation pin for stability control
  5. CS: Current sense pin for current regulation
  6. DRAIN: Switching transistor drain pin
  7. SOURCE: Switching transistor source pin
  8. VREF: Reference voltage output

Functional Features

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

Advantages

  • High efficiency conversion
  • Low standby power consumption
  • Compact size for space-constrained applications
  • Wide input voltage range for universal compatibility
  • Comprehensive protection features for reliable operation

Disadvantages

  • Limited output power compared to higher-rated models
  • Higher cost compared to non-integrated solutions
  • Requires external components for complete power supply implementation

Working Principles

TOP254EG is a switching power supply controller designed for offline power conversion applications. It utilizes a high-voltage power MOSFET to efficiently convert the input AC voltage into a regulated DC output. The controller operates in a fixed-frequency mode with frequency jittering to reduce electromagnetic interference (EMI). It incorporates various protection features such as overload, overvoltage, and auto-restart to ensure safe and reliable operation.

Detailed Application Field Plans

  • LED lighting
  • Consumer electronics
  • Industrial equipment
  • Telecommunications
  • Home appliances

Detailed and Complete Alternative Models

  1. TOP253EG: Similar specifications and features, different package (DIP-8)
  2. TOP255EG: Higher output power (up to 70W), similar characteristics and package (TO-220)
  3. TOP256EG: Higher output power (up to 100W), similar characteristics and package (TO-220)

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

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10個與TOP254EG在技術方案中應用相關的常見問題與解答

Sure! Here are 10 common questions and answers related to the application of TOP254EG in technical solutions:

  1. Q: What is TOP254EG? A: TOP254EG is a highly integrated offline switcher IC (integrated circuit) designed for low-power applications.

  2. Q: What are the typical applications of TOP254EG? A: TOP254EG is commonly used in power supplies for appliances, consumer electronics, industrial equipment, and lighting solutions.

  3. Q: What is the input voltage range supported by TOP254EG? A: TOP254EG supports an input voltage range of 85VAC to 265VAC, making it suitable for worldwide use.

  4. Q: Can TOP254EG handle high power loads? A: Yes, TOP254EG can handle power loads up to 30W, making it suitable for a wide range of low-power applications.

  5. Q: Does TOP254EG have built-in protection features? A: Yes, TOP254EG incorporates various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  6. Q: What is the efficiency of TOP254EG? A: TOP254EG offers high efficiency, typically above 80%, which helps reduce power consumption and heat generation.

  7. Q: Can TOP254EG operate in a wide temperature range? A: Yes, TOP254EG has a wide operating temperature range of -40°C to +150°C, allowing it to function reliably in various environments.

  8. Q: Is TOP254EG compatible with dimming or control systems? A: Yes, TOP254EG can be easily integrated with dimming or control systems using external components.

  9. Q: Does TOP254EG require an external MOSFET? A: No, TOP254EG integrates a high-voltage MOSFET, eliminating the need for an external one and simplifying the design.

  10. Q: Are there any reference designs available for TOP254EG? A: Yes, Power Integrations, the manufacturer of TOP254EG, provides reference designs and application notes to assist in implementing the IC effectively.

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