Voir les spécifications pour les détails du produit.
UCC28503NG4 - English Editing Encyclopedia Entry
Product Overview
Category
UCC28503NG4 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 but not limited to DC-DC converters, AC-DC converters, and battery chargers.
Characteristics
- High efficiency: UCC28503NG4 offers excellent power conversion efficiency, minimizing energy losses during operation.
- Wide input voltage range: It can handle a wide range of input voltages, making it suitable for diverse power supply applications.
- Robust protection features: The IC incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe and reliable operation.
- Fast transient response: UCC28503NG4 exhibits quick response to load changes, maintaining stable output voltages under dynamic conditions.
Package and Quantity
UCC28503NG4 is available in a compact and industry-standard package, such as a 16-pin SOIC (Small Outline Integrated Circuit) package. It is typically sold in reels containing a specified quantity, usually around 2500 units per reel.
Specifications
- Input Voltage Range: 4.5V to 65V
- Output Voltage Range: 0.8V to 60V
- Maximum Output Current: 3A
- Switching Frequency: 100kHz to 2MHz
- Operating Temperature Range: -40°C to 125°C
Pin Configuration
The UCC28503NG4 IC has a total of 16 pins, each serving a specific function. The pin configuration is as follows:
- VIN: Input voltage pin
- GND: Ground reference pin
- VREF: Reference voltage output pin
- COMP: Compensation pin for feedback control loop
- FB: Feedback voltage input pin
- CS: Current sense input pin
- SS/TR: Soft-start and tracking control pin
- EN/UVLO: Enable and undervoltage lockout control pin
- PGND: Power ground reference pin
- VCC: Supply voltage input pin
- VSENSE: Voltage sense input pin
- RT/CT: Timing resistor and capacitor connection pin
- SYNC: Synchronization input pin
- SS/TR2: Additional soft-start and tracking control pin
- NC: No connection pin
- VOUT: Output voltage pin
Functional Features
- Wide Input Voltage Range: UCC28503NG4 can operate with input voltages ranging from 4.5V to 65V, providing flexibility in various power supply applications.
- Voltage Regulation: The IC ensures precise output voltage regulation, maintaining a stable voltage level even under varying load conditions.
- Current Limiting: It incorporates current sensing mechanisms to limit the output current, protecting the system from overcurrent situations.
- Soft-Start Functionality: UCC28503NG4 features a soft-start mechanism that gradually ramps up the output voltage during startup, preventing excessive inrush currents.
- Protection Mechanisms: The IC includes built-in protection features such as overvoltage protection, overcurrent protection, and thermal shutdown, safeguarding the system against potential failures.
Advantages and Disadvantages
Advantages
- High efficiency leads to reduced power losses and improved energy conservation.
- Wide input voltage range enables versatile application possibilities.
- Robust protection mechanisms enhance system reliability and longevity.
- Fast transient response ensures stable output voltages during dynamic load changes.
Disadvantages
- Limited maximum output current of 3A may not be suitable for high-power applications.
- The IC's small package size may pose challenges in heat dissipation for certain high-power designs.
Working Principles
UCC28503NG4 operates based on a pulse-width modulation (PWM) control scheme. It utilizes feedback from the output voltage to regulate the duty cycle of the internal power switches, ensuring the desired output voltage is maintained. By adjusting the duty cycle, the IC controls the energy transfer from the input to the output, achieving efficient power conversion.
Application Field Plans
UCC28503NG4 finds applications in various power supply systems, including: - DC-DC converters for portable electronic devices - AC-DC converters for industrial equipment - Battery chargers for electric vehicles - Power supplies for telecommunications infrastructure
Alternative Models
For similar power management applications, alternative models to UCC28503NG4 include: - UCC28510: Offers higher maximum output current of 5A - UCC28517: Provides synchronous rectification capability for improved efficiency - UCC28528: Features adjustable switching frequency for better design flexibility
These alternative models can be considered based on specific application requirements and desired performance characteristics.
*
Énumérez 10 questions et réponses courantes liées à l'application de UCC28503NG4 dans les solutions techniques
Sure! Here are 10 common questions and answers related to the application of UCC28503NG4 in technical solutions:
Q: What is UCC28503NG4? A: UCC28503NG4 is a high-performance synchronous flyback controller designed for isolated power supply applications.
Q: What are the key features of UCC28503NG4? A: Some key features include wide input voltage range, constant voltage or constant current control, adjustable switching frequency, and integrated protection features.
Q: What are the typical applications of UCC28503NG4? A: UCC28503NG4 is commonly used in applications such as industrial power supplies, LED lighting, battery chargers, and telecom power systems.
Q: How does UCC28503NG4 achieve constant voltage or constant current control? A: UCC28503NG4 uses a feedback loop to regulate the output voltage or current by adjusting the duty cycle of the power switch.
Q: Can UCC28503NG4 operate with a wide input voltage range? A: Yes, UCC28503NG4 can typically operate with an input voltage range of 4.5V to 65V, making it suitable for various power supply designs.
Q: Is UCC28503NG4 capable of adjustable switching frequency? A: Yes, UCC28503NG4 allows users to adjust the switching frequency within a certain range to optimize efficiency or reduce EMI emissions.
Q: What protection features are integrated into UCC28503NG4? A: UCC28503NG4 includes features like overvoltage protection (OVP), undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown.
Q: Can UCC28503NG4 be used in high-power applications? A: Yes, UCC28503NG4 can be used in high-power applications by utilizing external power devices capable of handling higher currents.
Q: Does UCC28503NG4 support synchronization with other converters? A: Yes, UCC28503NG4 provides a synchronization pin that allows for synchronization with other converters to reduce system noise or improve power distribution.
Q: Are there any evaluation boards or reference designs available for UCC28503NG4? A: Yes, Texas Instruments provides evaluation boards and reference designs for UCC28503NG4, which can help users quickly prototype their power supply solutions.
Please note that the answers provided here are general and may vary depending on specific design requirements and application scenarios. It is always recommended to refer to the datasheet and application notes for detailed information.