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TOP256GN
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TOP256GN

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High Efficiency, Low Standby Power, Wide Input Voltage Range
  • Package: TO-220-7L
  • Essence: Offline Switcher
  • 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 +150°C
  • Efficiency: Up to 90%
  • Standby Power: Less than 100mW

Detailed Pin Configuration

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

Functional Features

  • Primary-Side Regulation (PSR) Control
  • Built-in Over-Temperature Protection
  • Auto-restart for Fault Conditions
  • Frequency Jittering for EMI Reduction
  • Cycle-by-Cycle Current Limiting
  • Line Under-Voltage Lockout (UVLO)
  • Output Over-Voltage Protection (OVP)

Advantages and Disadvantages

Advantages

  • High Efficiency leads to reduced power consumption
  • Low Standby Power minimizes energy wastage
  • Wide Input Voltage Range allows for universal compatibility
  • Compact TO-220-7L package enables easy integration
  • Built-in protection features enhance system reliability

Disadvantages

  • Relatively high cost compared to non-integrated solutions
  • Limited output power capability (up to 45W)

Working Principles

The TOP256GN is an offline switcher IC that utilizes primary-side regulation control. It integrates a power MOSFET, high-voltage startup circuitry, and various protection features into a single package. The PSR control eliminates the need for an optocoupler and secondary-side feedback components, simplifying the design and reducing cost. The IC operates in a quasi-resonant mode, providing high efficiency and low EMI emissions.

Detailed Application Field Plans

The TOP256GN is widely used in various power management applications, including:

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

Detailed and Complete Alternative Models

  1. TOP258PN: Similar specifications and features, different package (DIP-8)
  2. TOP257YN: Lower output power capability (up to 30W), similar package (TO-220-7L)
  3. TOP255GN: Higher output power capability (up to 60W), similar package (TO-220-7L)

Note: The above alternative models are from the same TOPSwitch-GX family and offer similar functionality.

In conclusion, the TOP256GN is a highly efficient offline switcher IC designed for power management applications. Its compact package, wide input voltage range, and integrated protection features make it suitable for various industries. While it may have a higher cost compared to non-integrated solutions, its advantages outweigh the disadvantages, making it a popular choice among designers.

技術ソリューションにおける TOP256GN 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 TOP256GN in technical solutions:

  1. Q: What is TOP256GN? A: TOP256GN is a highly integrated offline switcher IC (integrated circuit) designed for low-power applications.

  2. Q: What are the typical applications of TOP256GN? A: TOP256GN is commonly used in various low-power applications such as power supplies, LED lighting, industrial controls, and consumer electronics.

  3. Q: What is the maximum output power that TOP256GN can handle? A: TOP256GN can handle output powers up to 100 watts, making it suitable for a wide range of low-power applications.

  4. Q: Does TOP256GN require an external MOSFET? A: No, TOP256GN integrates a high-voltage power MOSFET, eliminating the need for an external MOSFET in most applications.

  5. Q: Can TOP256GN operate in a wide input voltage range? A: Yes, TOP256GN can operate in a wide input voltage range, typically from 85VAC to 265VAC.

  6. Q: Is TOP256GN suitable for universal input power supplies? A: Yes, TOP256GN is specifically designed for universal input power supplies, making it ideal for applications where the input voltage can vary.

  7. Q: Does TOP256GN have built-in protection features? A: Yes, TOP256GN incorporates various protection features like overvoltage protection, overcurrent protection, and thermal shutdown to ensure safe operation.

  8. Q: Can TOP256GN be easily controlled using external components? A: Yes, TOP256GN provides several control pins that allow easy implementation of functions like soft-start, frequency control, and current limit.

  9. Q: What is the efficiency of TOP256GN? A: TOP256GN offers high efficiency, typically above 85%, which helps in reducing power dissipation and improving overall system performance.

  10. Q: Are there any reference designs available for TOP256GN? A: Yes, Power Integrations, the manufacturer of TOP256GN, provides various reference designs and application notes to assist engineers in implementing the IC effectively.

Please note that these answers are general and may vary depending on specific design requirements and application scenarios.