Power Integrations
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TOP256MN
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TOP256MN

Product Overview

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

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 45W
  • Frequency Range: 50kHz to 300kHz
  • Operating Temperature Range: -40°C to +150°C
  • Maximum Duty Cycle: 75%
  • Startup Current: 25µA

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: Switching Transistor Drain Pin
  7. SOURCE: Switching Transistor Source Pin

Functional Features

  • Primary-Side Regulation (PSR) Control
  • Built-in Over-Temperature Protection
  • Auto-Restart Mode for Fault Recovery
  • Frequency Jittering for EMI Reduction
  • Adjustable Output Voltage

Advantages and Disadvantages

Advantages

  • High Efficiency, reducing power consumption
  • Low Standby Power, minimizing energy waste
  • Wide Input Voltage Range, suitable for various applications
  • Compact DIP-7C package, easy to integrate into designs
  • Built-in protection features enhance system reliability

Disadvantages

  • Limited maximum output power of 45W
  • Requires external components for complete power supply design
  • Not suitable for high-frequency applications

Working Principles

The TOP256MN is a switching regulator controller that utilizes primary-side regulation (PSR) control. It operates by modulating the duty cycle of the switching transistor to regulate the output voltage. The feedback pin (FB) is used to sense the output voltage and adjust the duty cycle accordingly. The compensation pin (COMP) is used to stabilize the control loop and ensure proper regulation.

The controller incorporates various protection features such as over-temperature protection and auto-restart mode. Over-temperature protection prevents the IC from overheating, while the auto-restart mode allows the system to recover from faults automatically.

Detailed Application Field Plans

The TOP256MN is commonly used in power supply applications where high efficiency and low standby power are required. It is suitable for a wide range of applications, including:

  1. LED Lighting Systems
  2. Consumer Electronics
  3. Industrial Equipment
  4. Telecommunications
  5. Home Appliances

Detailed and Complete Alternative Models

  • TOP257EN: Similar functionality with higher maximum output power (up to 65W)
  • TOP258PN: Enhanced version with additional protection features
  • TOP259GN: Suitable for high-frequency applications with extended frequency range

Note: This is not an exhaustive list, and there may be other alternative models available in the market.

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แสดงรายการคำถามและคำตอบทั่วไป 10 ข้อที่เกี่ยวข้องกับการใช้ TOP256MN ในโซลูชันทางเทคนิค

Sure! Here are 10 common questions and answers related to the application of TOP256MN in technical solutions:

  1. Q: What is TOP256MN? A: TOP256MN is a highly integrated offline switcher IC (integrated circuit) designed for low-power applications.

  2. Q: What are the typical applications of TOP256MN? A: TOP256MN is commonly used in power supplies for appliances, industrial controls, LED lighting, and other low-power systems.

  3. Q: What is the maximum output power that TOP256MN can handle? A: TOP256MN can handle up to 120 watts of output power, making it suitable for various low-power applications.

  4. Q: How does TOP256MN achieve high efficiency? A: TOP256MN incorporates advanced features like frequency jittering, cycle-by-cycle current limit, and auto-restart protection, which help optimize efficiency.

  5. Q: Can TOP256MN operate with wide input voltage ranges? A: Yes, TOP256MN can operate with input voltages ranging from 85VAC to 265VAC, making it compatible with different mains voltages worldwide.

  6. Q: Does TOP256MN have built-in protection features? A: Yes, TOP256MN includes features like thermal shutdown, overload protection, and overvoltage protection to ensure safe operation.

  7. Q: Is TOP256MN suitable for flyback converter designs? A: Yes, TOP256MN is specifically designed for flyback converter topologies, making it an ideal choice for such applications.

  8. Q: Can TOP256MN be used in battery-powered devices? A: No, TOP256MN is primarily intended for line-powered applications and requires an AC input source.

  9. Q: Are there any design resources available for TOP256MN? A: Yes, the manufacturer provides application notes, reference designs, and evaluation boards to assist in designing with TOP256MN.

  10. Q: Where can I purchase TOP256MN ICs? A: TOP256MN ICs are available from various electronic component distributors and online retailers.