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TOP256EG
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TOP256EG

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 Power Supply Controller
  • Packaging/Quantity: Tray, 500 units per tray

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 100W
  • Switching Frequency: 132 kHz to 150 kHz
  • Operating Temperature Range: -40°C to +125°C
  • Protection Features: Overvoltage Protection, Overcurrent Protection, Thermal Shutdown

Detailed Pin Configuration

  1. VCC: Power supply voltage input
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. COMP: Compensation pin for loop stability
  5. DRAIN: High-voltage power MOSFET drain connection
  6. SOURCE: High-voltage power MOSFET source connection
  7. CS: Current sense pin for current limit and overcurrent protection

Functional Features

  • Integrated high-voltage power MOSFET
  • Auto-restart protection for short-circuit and open-loop faults
  • Frequency jittering for reduced EMI
  • Built-in soft-start for controlled startup
  • Cycle-by-cycle current limit

Advantages

  • High efficiency leading to energy savings
  • Low standby power consumption
  • Wide input voltage range for versatile applications
  • Comprehensive protection features ensure system reliability
  • Compact TO-220-7L package for easy integration

Disadvantages

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

Working Principles

The TOP256EG is a switching power supply controller that regulates the output voltage by controlling the duty cycle of the internal power MOSFET. It operates in a flyback topology, where energy is stored in the transformer during the switch-on time and transferred to the output during the switch-off time. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle accordingly to maintain a stable output.

Detailed Application Field Plans

The TOP256EG is widely used in various applications requiring efficient power management. Some common application fields include:

  1. Consumer Electronics: Power adapters for laptops, gaming consoles, and set-top boxes.
  2. Industrial Equipment: LED lighting, motor drives, and industrial control systems.
  3. Telecommunications: Power supplies for routers, switches, and base stations.
  4. Automotive: On-board chargers for electric vehicles and battery management systems.

Detailed and Complete Alternative Models

  • TOP257EN: Similar specifications with enhanced features for higher power applications.
  • TOP258PN: Higher power capability with additional protection features.
  • TOP259GN: Wide input voltage range and extended temperature range for rugged environments.

Note: This is not an exhaustive list, and there are several other alternative models available from various manufacturers.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de TOP256EG en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of TOP256EG in technical solutions:

  1. Q: What is TOP256EG? A: TOP256EG is a highly integrated offline switcher IC (integrated circuit) designed for low-power applications.

  2. Q: What are the typical applications of TOP256EG? A: TOP256EG 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 TOP256EG can handle? A: TOP256EG can handle up to 94W of output power, making it suitable for various low-power applications.

  4. Q: Does TOP256EG require an external MOSFET? A: No, TOP256EG integrates a high-voltage power MOSFET, eliminating the need for an external MOSFET.

  5. Q: Can TOP256EG operate in a wide input voltage range? A: Yes, TOP256EG can operate in a wide input voltage range, typically from 85VAC to 265VAC.

  6. Q: Is TOP256EG suitable for universal input power supplies? A: Yes, TOP256EG is designed for universal input power supplies, making it compatible with different mains voltages worldwide.

  7. Q: Does TOP256EG have built-in protection features? A: Yes, TOP256EG incorporates various protection features like overvoltage protection, overload protection, and thermal shutdown.

  8. Q: Can TOP256EG provide constant current output for LED lighting? A: Yes, TOP256EG supports constant current control, making it suitable for driving LED lighting applications.

  9. Q: Does TOP256EG offer feedback options for voltage regulation? A: Yes, TOP256EG provides options for voltage feedback regulation, allowing precise control over the output voltage.

  10. Q: Is TOP256EG available in different package options? A: Yes, TOP256EG is available in various package options, including TO-220, TO-263, and eSIP-7F, providing flexibility for different designs.

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