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TOP250FN
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TOP250FN

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High-performance offline switcher, primary-side regulation (PSR) controller
  • Package: 7-pin TO-220 package
  • Essence: Efficiently regulates the output voltage of an offline power supply
  • Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 250W
  • Switching Frequency: 132kHz
  • Operating Temperature Range: -40°C to +150°C
  • Protection Features: Overload protection, overvoltage protection, thermal shutdown

Detailed Pin Configuration

  1. VCC: Power supply input for the IC
  2. FB: Feedback pin for regulating the output voltage
  3. GND: Ground reference for the IC
  4. DRAIN: Primary side switch drain connection
  5. SOURCE: Primary side switch source connection
  6. COMP: Compensation pin for stability control
  7. RT/CT: Timing components connection for frequency control

Functional Features

  • Primary-side regulation (PSR) eliminates the need for an optocoupler or secondary feedback circuitry
  • Constant voltage (CV) and constant current (CC) operation modes
  • Built-in high-voltage startup and sense FET
  • Auto-restart protection for fault conditions
  • Frequency jittering for reduced EMI emissions

Advantages and Disadvantages

Advantages: - Simplified design due to primary-side regulation - Reduced component count and cost - Improved efficiency and reliability - Compact form factor with TO-220 package

Disadvantages: - Limited output power compared to some other offline switchers - Requires careful consideration of component selection for optimal performance

Working Principles

TOP250FN is a high-performance offline switcher that utilizes primary-side regulation (PSR) to efficiently regulate the output voltage of an offline power supply. It eliminates the need for an optocoupler or secondary feedback circuitry, simplifying the design and reducing component count.

The IC incorporates a built-in high-voltage startup and sense FET, which enables it to operate directly from the input line voltage. It supports constant voltage (CV) and constant current (CC) operation modes, making it suitable for various power management applications.

The device features auto-restart protection, ensuring safe operation in fault conditions such as overloads or overvoltage events. Frequency jittering is implemented to reduce electromagnetic interference (EMI) emissions, complying with regulatory standards.

Detailed Application Field Plans

TOP250FN finds applications in various power management systems, including but not limited to: - AC/DC power supplies - LED lighting drivers - Battery chargers - Industrial controls - Home appliances

Its high-performance characteristics and primary-side regulation make it suitable for both low-power and medium-power applications.

Alternative Models

  • TOP249YN: Similar functionality with lower output power capability
  • TOP253PN: Higher output power capability with additional features
  • TOP256EN: Enhanced version with extended temperature range

These alternative models provide flexibility in selecting the appropriate IC based on specific application requirements.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av TOP250FN i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of TOP250FN in technical solutions:

  1. Q: What is TOP250FN? A: TOP250FN is a high-performance integrated switcher IC (integrated circuit) that is commonly used in power supply applications.

  2. Q: What are the key features of TOP250FN? A: The key features of TOP250FN include wide input voltage range, high efficiency, built-in protection features, and adjustable output voltage.

  3. Q: How does TOP250FN help in power supply designs? A: TOP250FN provides a compact and efficient solution for power supply designs by integrating various functions like switching control, power MOSFET, and protection circuits into a single chip.

  4. Q: Can TOP250FN be used in both AC-DC and DC-DC power supplies? A: Yes, TOP250FN can be used in both AC-DC and DC-DC power supply applications, making it versatile for various technical solutions.

  5. Q: What is the maximum output power that TOP250FN can handle? A: TOP250FN can handle output power up to 250 Watts, which makes it suitable for a wide range of power supply requirements.

  6. Q: Does TOP250FN have any built-in protection features? A: Yes, TOP250FN has built-in protection features like overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation of the power supply.

  7. Q: Can TOP250FN operate in a wide input voltage range? A: Yes, TOP250FN can operate in a wide input voltage range typically from 85VAC to 265VAC, making it suitable for global applications.

  8. Q: Is TOP250FN easy to use in power supply designs? A: Yes, TOP250FN is designed to be user-friendly with features like adjustable output voltage, soft-start capability, and frequency jittering for reduced EMI (electromagnetic interference).

  9. Q: Can TOP250FN be used in high-reliability applications? A: Yes, TOP250FN is suitable for high-reliability applications as it has a robust design, built-in protection features, and can operate in harsh environments.

  10. Q: Are there any application notes or reference designs available for TOP250FN? A: Yes, the manufacturer of TOP250FN provides application notes and reference designs that help engineers in implementing the IC effectively in their technical solutions.

Please note that the answers provided here are general and may vary depending on specific use cases and requirements.