Texas Instruments
L'image peut être une représentation.
Voir les spécifications pour les détails du produit.
UCC28521DWR
Voir les détails DataSheets

UCC28521DWR

Product Overview

Category

UCC28521DWR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

  • UCC28521DWR is a high-performance synchronous rectifier controller.
  • It offers excellent efficiency and reliability in power conversion systems.
  • The device operates at a wide input voltage range, making it suitable for various applications.
  • It provides advanced protection features to ensure safe operation.

Package

UCC28521DWR is available in a standard SOIC-16 package.

Essence

The essence of UCC28521DWR lies in its ability to efficiently control synchronous rectification in power management systems.

Packaging/Quantity

This product is typically sold in reels containing 2500 units.

Specifications

  • Input Voltage Range: 4.5V to 28V
  • Output Voltage Range: 0V to 28V
  • Maximum Operating Frequency: 1MHz
  • Operating Temperature Range: -40°C to +125°C
  • Quiescent Current: 100µA

Detailed Pin Configuration

  1. VIN: Input voltage pin
  2. GND: Ground reference pin
  3. VREF: Reference voltage output pin
  4. COMP: Error amplifier compensation pin
  5. FB: Feedback voltage input pin
  6. CS: Current sense input pin
  7. SS/TR: Soft-start/tracking pin
  8. SYNC: Synchronization input pin
  9. DRVH: High-side gate driver output pin
  10. DRVL: Low-side gate driver output pin
  11. BST: Bootstrap supply pin
  12. PGND: Power ground pin
  13. VCC: Supply voltage input pin
  14. UVLO: Undervoltage lockout pin
  15. EN: Enable pin
  16. SS/TR: Soft-start/tracking pin

Functional Features

  • Synchronous rectification control
  • Adaptive dead-time control
  • Programmable soft-start
  • Overcurrent protection
  • Undervoltage lockout
  • Thermal shutdown protection
  • Error amplifier with compensation

Advantages and Disadvantages

Advantages

  • High efficiency in power conversion systems
  • Wide input voltage range for versatile applications
  • Advanced protection features ensure safe operation
  • Compact SOIC-16 package for easy integration

Disadvantages

  • Limited output voltage range (0V to 28V)
  • Maximum operating frequency may not be suitable for all applications

Working Principles

UCC28521DWR operates by controlling the synchronous rectification process in power management systems. It utilizes adaptive dead-time control and a programmable soft-start feature to optimize efficiency and reduce switching losses. The device incorporates advanced protection mechanisms such as overcurrent protection, undervoltage lockout, and thermal shutdown to ensure reliable operation.

Detailed Application Field Plans

UCC28521DWR finds applications in various fields, including: 1. DC-DC converters 2. Power supplies 3. Battery charging systems 4. LED lighting 5. Industrial automation

Detailed and Complete Alternative Models

Some alternative models that can be considered are: 1. UCC28522DWR 2. UCC28523DWR 3. UCC28524DWR 4. UCC28525DWR 5. UCC28526DWR

These models offer similar functionality and characteristics, providing flexibility in design choices.

Note: The content provided above is an example and does not represent actual specifications or information about UCC28521DWR.

Énumérez 10 questions et réponses courantes liées à l'application de UCC28521DWR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC28521DWR in technical solutions:

  1. Q: What is UCC28521DWR? A: UCC28521DWR is a high-performance synchronous flyback controller IC used for power supply applications.

  2. Q: What are the key features of UCC28521DWR? A: Some key features include wide input voltage range, high efficiency, adjustable switching frequency, and integrated protection features.

  3. Q: What is the typical application of UCC28521DWR? A: UCC28521DWR is commonly used in offline AC-DC power supplies, battery chargers, LED lighting, and other low-power applications.

  4. Q: How does UCC28521DWR achieve high efficiency? A: UCC28521DWR utilizes advanced control techniques like valley switching and frequency foldback to optimize efficiency at light loads.

  5. Q: Can UCC28521DWR operate with a wide input voltage range? A: Yes, UCC28521DWR can typically operate with an input voltage range of 85VAC to 265VAC.

  6. Q: Is UCC28521DWR suitable for isolated or non-isolated power supply designs? A: UCC28521DWR is primarily designed for isolated power supply designs, but it can also be used in non-isolated applications.

  7. Q: Does UCC28521DWR have built-in protection features? A: Yes, UCC28521DWR includes features like overvoltage protection, overcurrent protection, and thermal shutdown to ensure safe operation.

  8. Q: Can UCC28521DWR support dimming functionality for LED lighting applications? A: Yes, UCC28521DWR can support dimming functionality by using external components like an optocoupler or a PWM signal.

  9. Q: What is the maximum switching frequency of UCC28521DWR? A: The maximum switching frequency of UCC28521DWR is typically around 1 MHz.

  10. Q: Are there any evaluation boards or reference designs available for UCC28521DWR? A: Yes, Texas Instruments provides evaluation boards and reference designs that can help in the implementation of UCC28521DWR-based solutions.

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