Power Integrations
A imagem pode ser uma representação.
Veja as especificações para detalhes do produto.
TOP249R-TL
Ver detalhes DataSheets

TOP249R-TL

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
  • Package: TO-220-7L
  • Essence: Switching Regulator Controller
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 9V to 38V
  • Output Power: Up to 60W
  • Switching Frequency: 132 kHz to 150 kHz
  • Operating Temperature Range: -40°C to +125°C
  • Output Voltage Accuracy: ±5%
  • Maximum Duty Cycle: 75%

Detailed Pin Configuration

  1. VCC: Supply voltage input
  2. FB: Feedback pin for output voltage regulation
  3. COMP: Compensation pin for loop stability
  4. CS: Current sense pin for current limit protection
  5. DRAIN: MOSFET drain pin for power switching
  6. GND: Ground reference
  7. SYNC: Synchronization pin for frequency synchronization

Functional Features

  • Primary-Side Regulation (PSR) Control
  • Built-in Overvoltage Protection (OVP)
  • Auto-Restart Protection for Fault Conditions
  • Frequency Jittering for EMI Reduction
  • Programmable Soft-Start Function
  • Cycle-by-Cycle Current Limiting
  • Line Under-Voltage Lockout (UVLO)
  • Thermal Shutdown Protection

Advantages and Disadvantages

Advantages: - High efficiency due to PSR control - Low standby power consumption - Wide input voltage range allows for versatile applications - Built-in protection features enhance system reliability - Compact TO-220-7L package for easy integration

Disadvantages: - Limited maximum output power of 60W - Output voltage accuracy of ±5% may not be suitable for precision applications

Working Principles

The TOP249R-TL is a switching regulator controller that utilizes primary-side regulation (PSR) control. It operates by modulating the duty cycle of the power switch to regulate the output voltage. The PSR control eliminates the need for an optocoupler or secondary-side feedback circuit, simplifying the design and reducing costs. The controller incorporates various protection features such as overvoltage protection, auto-restart protection, and thermal shutdown to ensure safe operation.

Detailed Application Field Plans

The TOP249R-TL is commonly used in various power management applications, including:

  1. AC-DC Power Supplies
  2. LED Lighting Systems
  3. Industrial Control Systems
  4. Telecom and Networking Equipment
  5. Consumer Electronics
  6. Battery Chargers

Detailed and Complete Alternative Models

  1. TOP250Y: Similar specifications and features, different package (TO-220-7C)
  2. TOP256EN: Higher maximum output power (90W), similar features, different package (TO-220-7C)
  3. TOP257YN: Lower maximum output power (45W), similar features, different package (TO-220-7C)

(Note: This list is not exhaustive and other alternative models may exist.)

Word count: 350 words

Liste 10 perguntas e respostas comuns relacionadas à aplicação de TOP249R-TL em soluções técnicas

Sure! Here are 10 common questions and answers related to the application of TOP249R-TL in technical solutions:

  1. Q: What is the TOP249R-TL? A: The TOP249R-TL is a highly integrated offline switcher IC designed for low power applications.

  2. Q: What are the key features of the TOP249R-TL? A: The key features include primary-side regulation, frequency jittering for EMI reduction, built-in protection features, and high efficiency.

  3. Q: What is primary-side regulation (PSR)? A: Primary-side regulation refers to the control of output voltage directly from the primary side of the transformer, eliminating the need for an optocoupler or secondary feedback circuitry.

  4. Q: How does frequency jittering help with EMI reduction? A: Frequency jittering spreads the energy of the switching waveform over a wider frequency range, reducing the peak amplitude at any specific frequency and minimizing electromagnetic interference (EMI).

  5. Q: What types of protection features are built into the TOP249R-TL? A: The TOP249R-TL includes features like overvoltage protection (OVP), overload protection (OLP), thermal shutdown (TSD), and auto-restart for fault recovery.

  6. Q: What is the typical efficiency of the TOP249R-TL? A: The TOP249R-TL offers high efficiency, typically above 85%, which helps reduce power dissipation and improve overall system performance.

  7. Q: Can the TOP249R-TL be used in both AC-DC and DC-DC applications? A: Yes, the TOP249R-TL can be used in both AC-DC and DC-DC applications, making it versatile for various power supply designs.

  8. Q: What is the maximum output power that can be achieved with the TOP249R-TL? A: The TOP249R-TL can handle output power up to 100 watts, depending on the specific application and operating conditions.

  9. Q: Is the TOP249R-TL suitable for offline power supplies? A: Yes, the TOP249R-TL is specifically designed for offline power supplies, making it ideal for applications where isolation from the AC mains is required.

  10. Q: Are there any reference designs or application notes available for the TOP249R-TL? A: Yes, the manufacturer provides reference designs and application notes that offer guidance on using the TOP249R-TL in various technical solutions, helping designers implement the IC effectively.

Please note that these answers are general and may vary depending on the specific requirements and application of the TOP249R-TL.