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UCC28502N
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UCC28502N - English Editing Encyclopedia Entry

Product Overview

Category

UCC28502N 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 to regulate and control voltage levels efficiently.

Characteristics

  • UCC28502N is a high-performance, low-power, and versatile power management IC.
  • It offers excellent voltage regulation and protection features.
  • The IC operates at a wide input voltage range, making it suitable for diverse applications.
  • It provides efficient power conversion with minimal power loss.

Package

UCC28502N is available in a compact and industry-standard 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of UCC28502N lies in its ability to provide reliable and precise voltage regulation, ensuring stable power supply in various electronic devices.

Packaging/Quantity

UCC28502N is typically packaged in reels or tubes, containing a quantity of 250 units per package.

Specifications

  • Input Voltage Range: 4.5V to 30V
  • Output Voltage Range: 0.8V to 28V
  • Maximum Output Current: 2A
  • Switching Frequency: 100kHz to 1MHz
  • Operating Temperature Range: -40°C to +125°C
  • Efficiency: Up to 95%

Detailed Pin Configuration

  1. VIN: Input voltage pin
  2. GND: Ground reference pin
  3. FB: Feedback pin for output voltage regulation
  4. COMP: Compensation pin for stability control
  5. EN: Enable pin for turning the IC on/off
  6. SS/TR: Soft-start/Tracking pin for controlling startup behavior
  7. VREF: Reference voltage output pin
  8. VOUT: Output voltage pin

Functional Features

  • Voltage regulation: UCC28502N ensures precise and stable output voltage regulation, even under varying load conditions.
  • Protection features: The IC incorporates various protection mechanisms such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown to safeguard the system and connected devices.
  • Soft-start capability: The soft-start feature allows for controlled startup, reducing inrush current and preventing voltage spikes.
  • Adjustable frequency: The switching frequency can be adjusted to optimize efficiency and minimize electromagnetic interference (EMI).
  • Current limit: UCC28502N includes a programmable current limit feature to protect against excessive current draw.

Advantages and Disadvantages

Advantages

  • High efficiency leads to reduced power consumption and heat dissipation.
  • Wide input voltage range enables compatibility with various power sources.
  • Compact package size facilitates space-saving designs.
  • Excellent voltage regulation ensures stable operation of connected devices.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Requires external components for complete power supply implementation.
  • Relatively higher cost compared to some alternative models.

Working Principles

UCC28502N operates on the principle of pulse width modulation (PWM) control. It uses feedback from the output voltage to adjust the duty cycle of the internal power switch, regulating the output voltage within the desired range. By continuously monitoring the feedback signal, the IC maintains a stable output voltage despite changes in load conditions.

Detailed Application Field Plans

UCC28502N finds application in various power management systems, including but not limited to: - DC-DC converters - Switching power supplies - Battery charging circuits - LED lighting drivers - Industrial automation equipment - Telecommunications infrastructure

Detailed and Complete Alternative Models

  1. LM2576-ADJ: A popular buck converter IC with adjustable output voltage and similar specifications to UCC28502N.
  2. LT1370: A high-performance step-down switching regulator IC suitable for a wide range of applications.
  3. TPS5430: An integrated buck converter with advanced features and excellent efficiency.

These alternative models offer similar functionality and can be considered as substitutes for UCC28502N, depending on specific requirements and design constraints.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением UCC28502N в технических решениях.

Sure! Here are 10 common questions and answers related to the application of UCC28502N in technical solutions:

  1. Q: What is UCC28502N? A: UCC28502N is a high-performance, low-power current mode PWM controller used for various power supply applications.

  2. Q: What are the key features of UCC28502N? A: Some key features include wide input voltage range, adjustable switching frequency, cycle-by-cycle current limit, and integrated soft-start.

  3. Q: What is the typical application of UCC28502N? A: UCC28502N is commonly used in offline flyback converters, LED drivers, battery chargers, and other isolated or non-isolated power supply designs.

  4. Q: How does UCC28502N achieve cycle-by-cycle current limit? A: UCC28502N utilizes a current sense resistor and an internal comparator to monitor the current flowing through the power switch, enabling precise current limiting.

  5. Q: Can UCC28502N operate with a wide input voltage range? A: Yes, UCC28502N can typically operate with an input voltage range of 4.5V to 65V, making it suitable for a wide range of applications.

  6. Q: Is UCC28502N capable of adjustable switching frequency? A: Yes, UCC28502N allows users to adjust the switching frequency using external components, providing flexibility in power supply design.

  7. Q: Does UCC28502N have integrated protection features? A: Yes, UCC28502N offers various protection features such as overvoltage protection, undervoltage lockout, thermal shutdown, and short-circuit protection.

  8. Q: Can UCC28502N be used in high-power applications? A: UCC28502N is primarily designed for low to medium power applications, typically up to a few hundred watts.

  9. Q: What is the efficiency of UCC28502N? A: The efficiency of UCC28502N depends on the specific application and operating conditions but can typically reach high levels due to its low-power design.

  10. Q: Are there any evaluation boards or reference designs available for UCC28502N? A: Yes, Texas Instruments provides evaluation boards and reference designs that can help users quickly prototype and implement UCC28502N-based solutions.

Please note that these answers are general and may vary depending on the specific requirements and implementation of UCC28502N in different technical solutions.