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TOP252EN
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TOP252EN

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
  • Package: PDIP-7, SMD-7C
  • Essence: Switching Power Supply Controller
  • Packaging/Quantity: Tube/50 pieces

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 45W
  • Frequency Range: 50Hz to 60Hz
  • Operating Temperature Range: -40°C to +125°C
  • Efficiency: Up to 88%
  • Standby Power: Less than 100mW

Detailed Pin Configuration

  1. VCC: Power Supply Voltage
  2. GND: Ground
  3. FB: Feedback Pin
  4. COMP: Compensation Pin
  5. CS: Current Sense Pin
  6. DRAIN: Power MOSFET Drain Pin
  7. SOURCE: Power MOSFET Source Pin

Functional Features

  • Primary-Side Regulation (PSR) Control
  • Frequency Jittering for EMI Reduction
  • Auto-Restart Protection
  • Over-Temperature Protection
  • Over-Voltage Protection
  • Under-Voltage Lockout (UVLO)

Advantages and Disadvantages

Advantages

  • High Efficiency leads to reduced power consumption
  • Wide Input Voltage Range allows for universal compatibility
  • Compact package size enables space-saving designs
  • Built-in protection features enhance system reliability

Disadvantages

  • Requires external components for complete power supply design
  • Limited output power compared to higher-end models
  • Not suitable for high-frequency applications

Working Principles

The TOP252EN is a switching power supply controller that utilizes primary-side regulation (PSR) control. It operates by modulating the duty cycle of the power MOSFET to regulate the output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly. The compensation pin (COMP) is used to stabilize the control loop and prevent oscillations. The current sense pin (CS) provides information about the load current, enabling accurate current limiting and protection.

Detailed Application Field Plans

The TOP252EN is commonly used in various applications, including:

  1. AC/DC Power Supplies
  2. LED Lighting
  3. Set-Top Boxes
  4. Audio Amplifiers
  5. Industrial Controls

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the TOP252EN are:

  1. TOP242EN
  2. TOP249EN
  3. TOP255EN
  4. LNK302PN
  5. UC3842B

These models offer similar functionality and can be suitable replacements depending on specific requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de TOP252EN dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of TOP252EN in technical solutions:

  1. Q: What is TOP252EN? A: TOP252EN is a high-performance integrated switcher IC (integrated circuit) designed for offline power supplies.

  2. Q: What are the key features of TOP252EN? A: The key features of TOP252EN include wide input voltage range, high efficiency, low standby power consumption, and built-in protection features.

  3. Q: What is the typical application of TOP252EN? A: TOP252EN is commonly used in various applications such as AC/DC power supplies, LED lighting, industrial controls, and consumer electronics.

  4. Q: How does TOP252EN achieve high efficiency? A: TOP252EN incorporates a highly efficient flyback topology along with advanced control techniques to minimize power losses and maximize overall efficiency.

  5. Q: Can TOP252EN handle different input voltages? A: Yes, TOP252EN has a wide input voltage range, typically from 85VAC to 265VAC, making it suitable for global applications.

  6. Q: Does TOP252EN provide any protection features? A: Yes, TOP252EN includes built-in protection features like overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown to ensure safe operation.

  7. Q: Is TOP252EN suitable for low-power applications? A: Yes, TOP252EN has a low standby power consumption and can be optimized for low-power applications, making it energy-efficient.

  8. Q: Can TOP252EN drive LEDs directly? A: No, TOP252EN is primarily designed for driving power supplies and requires additional circuitry to drive LEDs effectively.

  9. Q: Are there any design resources available for TOP252EN? A: Yes, the manufacturer provides datasheets, application notes, and reference designs to assist in the design and implementation of TOP252EN-based solutions.

  10. Q: What are the advantages of using TOP252EN in technical solutions? A: The advantages of using TOP252EN include high efficiency, compact size, reliable performance, and ease of integration, making it a popular choice for power supply applications.

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