Texas Instruments
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UCC28502NG4
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UCC28502NG4

Product Overview

Category

UCC28502NG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

  • UCC28502NG4 is a high-performance, synchronous rectifier controller.
  • It operates at a wide input voltage range and supports various output voltages.
  • The device offers excellent efficiency and reliability in power conversion systems.

Package

UCC28502NG4 is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of UCC28502NG4 lies in its ability to efficiently control synchronous rectification in power management systems.

Packaging/Quantity

This product is typically sold in reels containing a specific quantity of units. The exact packaging and quantity may vary depending on the supplier.

Specifications

  • Input Voltage Range: 4.5V to 28V
  • Output Voltage Range: Adjustable
  • Operating Temperature Range: -40°C to 125°C
  • Switching Frequency: Up to 1MHz
  • Maximum Duty Cycle: 100%
  • Control Method: Current Mode

Detailed Pin Configuration

  1. VIN: Input voltage pin
  2. GND: Ground pin
  3. FB: Feedback pin for output voltage regulation
  4. COMP: Compensation pin for stability control
  5. CS: Current sense pin for current mode control
  6. SS/TR: Soft-start/Tracking pin for startup control
  7. VCC: Supply voltage pin
  8. SW: Switch node pin for synchronous rectification control

Functional Features

  • Synchronous rectification control for improved efficiency
  • Current mode control for stable operation
  • Soft-start and tracking functionality for controlled startup
  • Wide input voltage range for versatile applications
  • High switching frequency capability for compact designs
  • Overcurrent protection for enhanced reliability

Advantages and Disadvantages

Advantages

  • High efficiency in power conversion systems
  • Wide input voltage range allows for flexibility in applications
  • Compact size due to high switching frequency capability
  • Reliable operation with overcurrent protection

Disadvantages

  • Requires additional external components for complete power management system implementation
  • Limited output voltage range compared to some other controllers

Working Principles

UCC28502NG4 operates based on a current mode control method. It regulates the output voltage by adjusting the duty cycle of the synchronous rectification switch. The device continuously monitors the current flowing through the power stage and adjusts the switch accordingly to maintain stable operation. Soft-start functionality ensures controlled startup, while overcurrent protection safeguards against excessive currents.

Detailed Application Field Plans

UCC28502NG4 finds application in various power management systems, including but not limited to: - DC-DC converters - AC-DC converters - Power supplies - Battery charging systems - LED lighting drivers

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to UCC28502NG4 are: - UCC28501NG4 - UCC28503NG4 - UCC28504NG4 - UCC28505NG4

These models offer similar functionalities and characteristics, providing options for different design requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de UCC28502NG4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC28502NG4 in technical solutions:

  1. Q: What is UCC28502NG4? A: UCC28502NG4 is a high-performance, synchronous flyback controller designed for isolated power supply applications.

  2. Q: What are the key features of UCC28502NG4? A: Some key features include wide input voltage range, high efficiency, adjustable switching frequency, and comprehensive protection features.

  3. Q: What is the typical application of UCC28502NG4? A: UCC28502NG4 is commonly used in applications such as telecom power supplies, industrial power supplies, and battery chargers.

  4. Q: How does UCC28502NG4 achieve high efficiency? A: UCC28502NG4 utilizes advanced control techniques like valley current mode control and adaptive dead-time optimization to maximize efficiency.

  5. Q: Can UCC28502NG4 operate with a wide input voltage range? A: Yes, UCC28502NG4 can operate with an input voltage range from 4.5V to 65V, making it suitable for various applications.

  6. Q: Is the switching frequency adjustable in UCC28502NG4? A: Yes, UCC28502NG4 allows the user to adjust the switching frequency within a certain range to optimize performance based on specific requirements.

  7. Q: What protection features does UCC28502NG4 offer? A: UCC28502NG4 provides comprehensive protection features including overvoltage protection, undervoltage lockout, overcurrent protection, and thermal shutdown.

  8. Q: Can UCC28502NG4 support synchronous rectification? A: Yes, UCC28502NG4 supports synchronous rectification, which helps improve overall efficiency by reducing power losses.

  9. Q: Does UCC28502NG4 have built-in soft-start functionality? A: Yes, UCC28502NG4 has a built-in soft-start feature that allows for controlled startup and reduces inrush current.

  10. Q: What is the package type of UCC28502NG4? A: UCC28502NG4 is available in a small outline integrated circuit (SOIC) package, which is commonly used in electronic applications.

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