Power Integrations
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TOP254PG
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TOP254PG

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
  • Package: 7-Lead TO-220
  • Essence: Offline Switcher
  • Packaging/Quantity: Tube/50 pieces per tube

Specifications

  • Input Voltage Range: 85 VAC to 265 VAC
  • Output Power: Up to 45 W
  • Switching Frequency: 132 kHz
  • Operating Temperature Range: -40°C to +150°C
  • Protection Features: Overload Protection, Overvoltage Protection, Overtemperature Protection

Detailed Pin Configuration

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

Functional Features

  • Primary-Side Regulation (PSR): Eliminates the need for an optocoupler and secondary-side feedback components.
  • Frequency Jittering: Reduces EMI emissions and improves system reliability.
  • Auto-Restart Protection: Ensures continuous operation by automatically restarting after a fault condition is removed.
  • Cycle-by-Cycle Current Limiting: Provides accurate current limiting for improved system protection.

Advantages

  • High efficiency, reducing power consumption and heat dissipation.
  • Low standby power, meeting energy-saving requirements.
  • Wide input voltage range, suitable for various applications.
  • Compact TO-220 package, easy to integrate into different designs.
  • Comprehensive protection features ensure system reliability.

Disadvantages

  • Requires external components for complete functionality.
  • Limited output power compared to higher-rated devices.
  • Higher cost compared to non-integrated solutions.

Working Principles

The TOP254PG is an offline switcher IC that operates in a flyback topology. It uses primary-side regulation (PSR) to control the output voltage without the need for an optocoupler or secondary-side feedback components. The IC incorporates a high-voltage power MOSFET, which enables it to handle the high input voltage range.

The device operates by switching the primary-side MOSFET on and off at a fixed frequency. The energy is stored in the transformer during the on-time and transferred to the output during the off-time. The feedback pin monitors the output voltage and adjusts the duty cycle of the MOSFET to maintain a stable output.

Detailed Application Field Plans

The TOP254PG is commonly used in various power management applications, including:

  1. AC-DC Power Supplies
  2. LED Lighting
  3. Home Appliances
  4. Industrial Controls
  5. Consumer Electronics

Detailed and Complete Alternative Models

  1. TOP253PN: Similar specifications and features, but in a DIP-8 package.
  2. TOP255PN: Higher output power capability, up to 70 W.
  3. TOP256EN: Enhanced version with additional protection features.
  4. TOP257YN: Lower cost option with reduced functionality.

These alternative models provide flexibility in design and cater to different application requirements.

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Maglista ng 10 karaniwang tanong at sagot na nauugnay sa aplikasyon ng TOP254PG sa mga teknikal na solusyon

Sure! Here are 10 common questions and answers related to the application of TOP254PG in technical solutions:

  1. Q: What is TOP254PG? A: TOP254PG is a highly integrated offline switcher IC (integrated circuit) designed for low-power applications.

  2. Q: What are the typical applications of TOP254PG? A: TOP254PG is commonly used in various low-power applications such as power supplies, LED lighting, and battery chargers.

  3. Q: What is the input voltage range supported by TOP254PG? A: The input voltage range supported by TOP254PG is typically between 85V AC and 265V AC.

  4. Q: Can TOP254PG handle high-voltage inputs? A: Yes, TOP254PG is designed to handle high-voltage inputs, making it suitable for universal input applications.

  5. Q: What is the maximum output power that TOP254PG can deliver? A: TOP254PG can deliver a maximum output power of up to 30 watts, depending on the specific application and design.

  6. Q: Does TOP254PG have built-in protection features? A: Yes, TOP254PG incorporates various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  7. Q: Can TOP254PG operate in a wide temperature range? A: Yes, TOP254PG is designed to operate reliably in a wide temperature range, typically from -40°C to +150°C.

  8. Q: Is TOP254PG compatible with dimming functionality for LED lighting applications? A: Yes, TOP254PG supports dimming functionality for LED lighting applications through external control circuitry.

  9. Q: What is the efficiency of TOP254PG? A: TOP254PG offers high efficiency, typically above 85%, which helps to minimize power losses and improve overall energy efficiency.

  10. Q: Are there any reference designs available for TOP254PG? A: Yes, the manufacturer of TOP254PG provides reference designs and application notes that can help in implementing the IC effectively in various technical solutions.

Please note that the answers provided here are general and may vary depending on the specific implementation and design considerations.