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TOP245GN
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TOP245GN

Product Overview

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

Specifications

  • Input Voltage Range: 85V to 265V AC
  • Output Power: Up to 45W
  • Frequency Range: 50kHz to 300kHz
  • Operating Temperature Range: -40°C to 150°C
  • Maximum Duty Cycle: 78%
  • Maximum Output Voltage: 700V
  • Maximum Output Current: 1.5A

Detailed Pin Configuration

  1. VCC: Power Supply Voltage
  2. GND: Ground
  3. FB: Feedback Pin for Voltage Regulation
  4. COMP: Compensation Pin for Loop Stability
  5. CS: Current Sense Pin
  6. DRAIN: High-Voltage Power MOSFET Drain Connection
  7. SOURCE: High-Voltage Power MOSFET Source Connection
  8. VREF: Reference Voltage Output

Functional Features

  • Integrated high-voltage power MOSFET
  • Built-in frequency jittering for reduced EMI
  • Auto-restart protection for overvoltage and overcurrent conditions
  • Internal leading-edge blanking for improved efficiency
  • Accurate current limit with adjustable set point
  • Soft-start for controlled startup
  • Overtemperature protection

Advantages and Disadvantages

Advantages

  • High efficiency resulting in reduced power consumption
  • Wide input voltage range allows for global compatibility
  • Compact TO-220 package for easy integration
  • Comprehensive protection features ensure system reliability
  • Adjustable current limit for flexibility in design

Disadvantages

  • Limited maximum output power of 45W
  • Relatively high operating temperature range

Working Principles

TOP245GN is a switching power supply controller that regulates the output voltage by controlling the duty cycle of a high-voltage power MOSFET. It operates in a flyback topology, where energy is stored in an inductor during the switch-on time and transferred to the output during the switch-off time. The integrated circuit provides various control functions such as frequency jittering, current sensing, and overvoltage protection.

Detailed Application Field Plans

  • Offline AC/DC power supplies
  • LED lighting drivers
  • Battery chargers
  • Industrial power systems
  • Consumer electronics

Detailed and Complete Alternative Models

  1. TOP246YN: Similar specifications and features, different package (DIP-8)
  2. TOP247YN: Higher maximum output power (60W), similar features, different package (DIP-8)
  3. TOP248YN: Lower maximum output power (35W), similar features, different package (DIP-8)

Note: These alternative models are from the same TOPSwitch family and offer similar functionality with slight variations in specifications and package options.

This entry provides an overview of the TOP245GN integrated circuit, including its product category, use, characteristics, package, and specifications. It also includes detailed information on pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

技術ソリューションにおける TOP245GN の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of TOP245GN in technical solutions:

  1. Q: What is TOP245GN? A: TOP245GN is a highly integrated offline switcher IC (integrated circuit) that provides high-efficiency power conversion for various applications.

  2. Q: What are the typical applications of TOP245GN? A: TOP245GN is commonly used in power supplies for consumer electronics, industrial equipment, LED lighting, and other low-power applications.

  3. Q: What is the input voltage range supported by TOP245GN? A: The input voltage range of TOP245GN typically spans from 85VAC to 265VAC, making it suitable for worldwide use.

  4. Q: What is the maximum output power that TOP245GN can handle? A: TOP245GN can handle output powers up to approximately 45 watts, depending on the specific design and operating conditions.

  5. Q: How does TOP245GN achieve high efficiency? A: TOP245GN incorporates advanced features like frequency jittering, cycle-by-cycle current limit, and burst mode operation to maximize power conversion efficiency.

  6. Q: Can TOP245GN operate in a wide temperature range? A: Yes, TOP245GN is designed to operate reliably over a wide temperature range, typically from -40°C to +150°C.

  7. Q: Does TOP245GN provide protection features? A: Yes, TOP245GN includes built-in protection features such as thermal shutdown, overload protection, and overvoltage protection to ensure safe operation.

  8. Q: Can TOP245GN be used in designs requiring low standby power consumption? A: Yes, TOP245GN supports low standby power consumption through its burst mode operation, which reduces power consumption during light load conditions.

  9. Q: Is TOP245GN compatible with external control circuits? A: Yes, TOP245GN can be easily integrated with external control circuits to provide additional functionality and customization.

  10. Q: Are there any application notes or reference designs available for TOP245GN? A: Yes, the manufacturer of TOP245GN provides application notes, reference designs, and evaluation boards to assist designers in implementing the IC effectively.

Please note that these answers are general and may vary depending on the specific design requirements and operating conditions.