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UCC28517N
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UCC28517N - English Editing Encyclopedia Entry

Product Overview

Category

UCC28517N belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

  • UCC28517N is a high-performance, synchronous flyback controller.
  • It offers excellent regulation and transient response.
  • The device operates in continuous conduction mode (CCM).
  • It supports primary-side regulation (PSR) control.

Package

UCC28517N is available in a standard 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of UCC28517N lies in its ability to efficiently regulate and control power in various applications.

Packaging/Quantity

UCC28517N is typically sold in reels containing 250 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 65V
  • Output Voltage Range: 0.8V to 60V
  • Maximum Switching Frequency: 1 MHz
  • Operating Temperature Range: -40°C to 125°C
  • Quiescent Current: 2.5 mA

Detailed Pin Configuration

  1. VDD: Power supply input
  2. FB: Feedback pin for voltage regulation
  3. COMP: Compensation pin for stability control
  4. CS: Current sense input
  5. GND: Ground reference
  6. DRV: Gate driver output
  7. RT/CLK: External resistor or clock input
  8. EN/UVLO: Enable and undervoltage lockout control

Functional Features

  • Primary-side regulation (PSR) control eliminates the need for an optocoupler.
  • Adaptive dead-time control improves efficiency and reduces switching losses.
  • Programmable soft-start feature prevents excessive inrush current during startup.
  • Overvoltage protection (OVP) and overcurrent protection (OCP) ensure system safety.
  • Frequency dithering minimizes electromagnetic interference (EMI).

Advantages and Disadvantages

Advantages

  • High-performance regulation and transient response.
  • Primary-side regulation simplifies circuit design.
  • Wide input and output voltage ranges allow for versatile applications.
  • Adaptive dead-time control enhances efficiency.
  • Comprehensive protection features ensure system reliability.

Disadvantages

  • Limited maximum switching frequency compared to some other ICs in the same category.
  • Requires external components for proper operation.

Working Principles

UCC28517N operates by regulating the power flow in a synchronous flyback converter. It utilizes primary-side regulation (PSR) control, which eliminates the need for an optocoupler. The device senses the output voltage through the feedback (FB) pin and adjusts the duty cycle of the power switch accordingly. This control mechanism ensures accurate voltage regulation and excellent transient response.

Detailed Application Field Plans

UCC28517N finds application in various power management systems, including but not limited to: - AC/DC power supplies - LED lighting drivers - Industrial automation equipment - Telecommunications infrastructure - Automotive electronics

Detailed and Complete Alternative Models

  1. UCC28516: Similar to UCC28517N, but with a different pin configuration.
  2. UCC28600: Flyback controller with additional features like active burst mode operation.
  3. UCC28740: Primary-side regulated flyback controller with integrated power factor correction (PFC).

These alternative models offer similar functionality and can be considered based on specific requirements and design constraints.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением UCC28517N в технических решениях.

Sure! Here are 10 common questions and answers related to the application of UCC28517N in technical solutions:

  1. Q: What is UCC28517N? A: UCC28517N is a high-performance, active power factor correction (PFC) controller designed for AC-DC power supplies.

  2. Q: What is the input voltage range supported by UCC28517N? A: UCC28517N supports an input voltage range from 85VAC to 265VAC.

  3. Q: What is the output power range that UCC28517N can handle? A: UCC28517N can handle output power ranging from a few watts to several hundred watts.

  4. Q: Can UCC28517N be used in both single-phase and three-phase applications? A: Yes, UCC28517N can be used in both single-phase and three-phase applications.

  5. Q: Does UCC28517N have built-in protection features? A: Yes, UCC28517N has built-in protection features such as overvoltage protection, overcurrent protection, and overtemperature protection.

  6. Q: What is the switching frequency range of UCC28517N? A: The switching frequency range of UCC28517N is typically between 20kHz and 200kHz.

  7. Q: Can UCC28517N operate in continuous conduction mode (CCM)? A: Yes, UCC28517N can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM).

  8. Q: Is UCC28517N suitable for high-efficiency power supply designs? A: Yes, UCC28517N is designed for high-efficiency power supply designs, offering excellent power factor correction and low total harmonic distortion.

  9. Q: What type of control method does UCC28517N use? A: UCC28517N uses average current mode control (ACMC) for precise regulation and stability.

  10. Q: Are there any reference designs available for UCC28517N? A: Yes, Texas Instruments provides reference designs and application notes that can help in implementing UCC28517N in various technical solutions.

Please note that the answers provided here are general and may vary depending on specific application requirements. It is always recommended to refer to the datasheet and application notes for detailed information.