Power Integrations
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TOP271KG
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TOP271KG

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: Tray, 50 pieces per tray

Specifications

  • Input Voltage Range: 85VAC to 265VAC
  • Output Power: Up to 25W
  • Switching Frequency: 132kHz
  • Operating Temperature Range: -40°C to +125°C
  • Protection Features: Overvoltage Protection, Overcurrent Protection, Overtemperature Protection

Detailed Pin Configuration

The TOP271KG IC has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for voltage regulation
  4. COMP: Compensation pin for loop stability
  5. CS: Current sense input
  6. DRAIN: High-voltage power MOSFET drain connection
  7. SOURCE: High-voltage power MOSFET source connection
  8. VREF: Reference voltage output
  9. SYNC: Synchronization input for multiple ICs
  10. RT/CT: Timing resistor and capacitor connection for frequency control

Functional Features

  • Integrated high-voltage power MOSFET
  • Frequency jittering for reduced EMI
  • Auto-restart protection for fault conditions
  • Built-in soft-start for controlled startup
  • Cycle-by-cycle current limit
  • Adjustable line undervoltage lockout (UVLO)

Advantages and Disadvantages

Advantages: - High efficiency leading to energy savings - Low standby power consumption - Wide input voltage range for versatile applications - Comprehensive protection features ensure system reliability

Disadvantages: - Requires external components for complete power supply design - Limited output power compared to higher-rated ICs

Working Principles

The TOP271KG is a switching power supply controller that regulates the output voltage by controlling the duty cycle of the high-voltage 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 TOP271KG is commonly used in various applications, including:

  1. AC-DC power supplies for consumer electronics
  2. LED lighting systems
  3. Industrial power equipment
  4. Telecom power supplies
  5. Battery chargers

Detailed and Complete Alternative Models

Some alternative models to TOP271KG include:

  1. TOP256EN
  2. TOP258PN
  3. UC3842B
  4. LNK364GN
  5. FAN7602B

These models offer similar functionality and can be suitable replacements depending on specific requirements.

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10 pirs û bersivên hevpar ên têkildarî sepana TOP271KG di çareseriyên teknîkî de navnîş bikin

Sure! Here are 10 common questions and answers related to the application of TOP271KG in technical solutions:

  1. Q: What is TOP271KG? A: TOP271KG is a high-performance integrated switcher IC (integrated circuit) designed for offline power supplies.

  2. Q: What are the key features of TOP271KG? A: The key features of TOP271KG include wide input voltage range, high efficiency, low standby power consumption, and comprehensive protection features.

  3. Q: What are the typical applications of TOP271KG? A: TOP271KG is commonly used in various technical solutions such as LED lighting, industrial power supplies, consumer electronics, and telecommunication equipment.

  4. Q: How does TOP271KG achieve high efficiency? A: TOP271KG incorporates advanced control techniques like frequency jittering and cycle-by-cycle current limit to optimize efficiency and minimize power losses.

  5. Q: Can TOP271KG handle different input voltages? A: Yes, TOP271KG has a wide input voltage range, typically from 85VAC to 265VAC, making it suitable for global applications.

  6. Q: Does TOP271KG offer protection features? A: Yes, TOP271KG provides comprehensive protection features including overvoltage protection, overcurrent protection, and thermal shutdown.

  7. Q: Is TOP271KG compatible with dimming functionality for LED lighting applications? A: Yes, TOP271KG can be easily integrated with external dimming circuits to enable dimming functionality in LED lighting applications.

  8. Q: What is the maximum output power that TOP271KG can handle? A: The maximum output power of TOP271KG depends on the specific design and application, but it can typically handle power levels up to several hundred watts.

  9. Q: Can TOP271KG operate in a wide temperature range? A: Yes, TOP271KG is designed to operate reliably in a wide temperature range, typically from -40°C to 125°C.

  10. Q: Are there any evaluation boards or reference designs available for TOP271KG? A: Yes, Power Integrations, the manufacturer of TOP271KG, provides evaluation boards and reference designs that can help engineers quickly prototype and implement their technical solutions.

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