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UCC28514N
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UCC28514N - English Editing Encyclopedia Entry

Product Overview

Category

UCC28514N belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply systems, including switch-mode power supplies (SMPS), battery chargers, and LED drivers.

Characteristics

  • UCC28514N is a high-performance synchronous flyback controller.
  • It operates with a wide input voltage range, making it suitable for different power supply designs.
  • The IC incorporates advanced features such as soft-start, cycle-by-cycle current limit, and overvoltage protection.
  • It offers excellent efficiency and reliability, ensuring stable power delivery in demanding applications.

Package and Quantity

UCC28514N is available in a standard 8-pin SOIC (Small Outline Integrated Circuit) package. It is typically sold in reels containing a quantity of 250 units.

Specifications

  • Input Voltage Range: 9V to 75V
  • Output Voltage Range: Adjustable, depending on application requirements
  • Maximum Switching Frequency: 500 kHz
  • Operating Temperature Range: -40°C to +125°C
  • Control Method: Current Mode Control
  • Protection Features: Overvoltage Protection, Cycle-by-Cycle Current Limit, Soft-Start

Pin Configuration

The UCC28514N IC has the following pin configuration:

  1. VDD: Power supply input pin.
  2. GND: Ground reference pin.
  3. FB: Feedback pin for regulating the output voltage.
  4. COMP: Compensation pin for stability control.
  5. CS: Current sense pin for cycle-by-cycle current limit.
  6. RT/CT: Timing resistor/capacitor connection pin for setting switching frequency.
  7. SS/UVLO: Soft-start/Undervoltage lockout pin for controlling startup behavior.
  8. DRV: Gate driver output pin for driving the power switch.

Functional Features

  1. Current Mode Control: UCC28514N utilizes current mode control to regulate the output voltage, providing excellent line and load transient response.
  2. Soft-Start: The soft-start feature ensures a controlled startup by gradually increasing the output voltage, preventing excessive inrush current.
  3. Cycle-by-Cycle Current Limit: This IC incorporates cycle-by-cycle current limit protection, safeguarding the system against overcurrent conditions.
  4. Overvoltage Protection: UCC28514N includes overvoltage protection, which shuts down the power supply if the output voltage exceeds a predefined threshold.

Advantages and Disadvantages

Advantages

  • Wide input voltage range allows for versatile application possibilities.
  • High-performance synchronous flyback controller design ensures efficient power conversion.
  • Incorporation of advanced protection features enhances system reliability.
  • Compact 8-pin SOIC package facilitates easy integration into various circuit designs.

Disadvantages

  • Limited pin count may restrict the number of additional features that can be implemented.
  • Requires external components for complete power supply implementation.

Working Principles

UCC28514N operates based on the principle of current mode control. It regulates the output voltage by continuously monitoring the current flowing through the power switch. By adjusting the duty cycle of the switch, it maintains a stable output voltage despite variations in input voltage or load conditions. The soft-start feature gradually ramps up the output voltage during startup, preventing excessive stress on components. In case of overvoltage or overcurrent conditions, the IC triggers the corresponding protection mechanisms to ensure safe operation.

Application Field Plans

UCC28514N finds extensive use in various power management applications, including: - Switch-mode power supplies (SMPS) for industrial and consumer electronics. - Battery chargers for portable devices, electric vehicles, and renewable energy systems. - LED drivers for lighting applications, both residential and commercial.

Alternative Models

For power management applications similar to UCC28514N, the following alternative models can be considered: 1. UCC28515N 2. UCC28516N 3. UCC28517N 4. UCC28518N

These alternatives offer similar functionalities and characteristics, providing flexibility in design choices.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق UCC28514N في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of UCC28514N in technical solutions:

  1. Q: What is UCC28514N? A: UCC28514N is a high-performance, low-power current mode PWM controller designed for offline flyback converters.

  2. Q: What is the input voltage range of UCC28514N? A: The input voltage range of UCC28514N is typically from 4.5V to 30V.

  3. Q: What is the maximum switching frequency supported by UCC28514N? A: UCC28514N supports a maximum switching frequency of up to 1 MHz.

  4. Q: Can UCC28514N be used in isolated or non-isolated applications? A: Yes, UCC28514N can be used in both isolated and non-isolated applications.

  5. Q: What are the key features of UCC28514N? A: Some key features of UCC28514N include cycle-by-cycle peak current limit, adjustable soft-start, frequency jittering for EMI reduction, and integrated high-voltage startup.

  6. Q: What is the typical output power range for UCC28514N? A: UCC28514N can support output power ranging from a few watts to several tens of watts.

  7. Q: Does UCC28514N have built-in protection features? A: Yes, UCC28514N includes various protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.

  8. Q: Can UCC28514N operate in continuous conduction mode (CCM)? A: Yes, UCC28514N can operate in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM).

  9. Q: What is the typical efficiency of UCC28514N? A: The typical efficiency of UCC28514N can exceed 90% depending on the application and operating conditions.

  10. Q: Are there any evaluation boards or reference designs available for UCC28514N? A: Yes, Texas Instruments provides evaluation boards and reference designs to help users quickly prototype and implement solutions using UCC28514N.

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