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UCC28503N - English Editing Encyclopedia Entry
Product Overview
Category
UCC28503N belongs to the category of integrated circuits (ICs).
Use
This IC is commonly used in power management applications.
Characteristics
- UCC28503N is a high-performance voltage mode PWM controller.
- It operates with a wide input voltage range and is suitable for various power supply designs.
- The IC offers excellent line and load regulation, making it ideal for demanding applications.
- It provides precise control over output voltage and current, ensuring stable and efficient power delivery.
Package
UCC28503N is available in a standard 8-pin dual in-line package (DIP).
Essence
The essence of UCC28503N lies in its ability to regulate and control power supply voltages efficiently.
Packaging/Quantity
UCC28503N is typically sold 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: 1A
- Switching Frequency: 100kHz to 1MHz
- Operating Temperature Range: -40°C to +125°C
Detailed Pin Configuration
- VCC: Power supply input pin.
- COMP: Compensation pin for loop stability.
- FB: Feedback pin for regulating the output voltage.
- CS: Current sense pin for monitoring the output current.
- GND: Ground reference pin.
- RT/CT: Timing components connection pins.
- SS/TR: Soft-start and tracking pin.
- OUT: Output pin for delivering regulated voltage.
Functional Features
- Wide Input Voltage Range: UCC28503N can operate with an input voltage ranging from 4.5V to 30V, providing flexibility in power supply designs.
- Precise Output Regulation: The IC offers excellent line and load regulation, ensuring stable output voltage under varying conditions.
- High Efficiency: UCC28503N incorporates advanced control techniques that minimize power losses, resulting in high overall efficiency.
- Protection Mechanisms: The IC includes built-in protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown, enhancing system reliability.
Advantages and Disadvantages
Advantages
- Wide input voltage range allows for versatile applications.
- Excellent line and load regulation ensure stable output voltage.
- High efficiency minimizes power losses.
- Integrated protection mechanisms enhance system reliability.
Disadvantages
- Limited maximum output current of 1A may not be suitable for high-power applications.
- Availability in only a DIP package may limit space-constrained designs.
Working Principles
UCC28503N operates based on the voltage mode PWM control technique. It compares the feedback voltage with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the internal power switch. By adjusting the duty cycle, the IC regulates the output voltage according to the desired setpoint. The precise control mechanism ensures stable and efficient power delivery.
Detailed Application Field Plans
UCC28503N finds extensive application in various power management systems, including but not limited to: - DC-DC converters - Switching power supplies - Battery chargers - LED drivers - Industrial automation equipment
Detailed and Complete Alternative Models
- UCC28503DW: Similar to UCC28503N, but available in a surface mount package (SOIC).
- UCC28503EVM: Evaluation module for testing and prototyping purposes.
- UCC28504N: A higher current variant of UCC28503N, capable of delivering up to 3A output current.
These alternative models offer similar functionality and can be considered as substitutes for UCC28503N based on specific application requirements.
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10 domande e risposte comuni relative all'applicazione di UCC28503N nelle soluzioni tecniche
Sure! Here are 10 common questions and answers related to the application of UCC28503N in technical solutions:
Q: What is UCC28503N? A: UCC28503N is a high-performance, low-power current mode PWM controller used for various power supply applications.
Q: What are the key features of UCC28503N? A: Some key features include wide input voltage range, adjustable switching frequency, cycle-by-cycle current limit, and integrated soft-start.
Q: What is the typical application of UCC28503N? A: UCC28503N is commonly used in offline flyback converters, LED lighting drivers, and other isolated power supply designs.
Q: How does UCC28503N help in improving power efficiency? A: UCC28503N incorporates advanced control techniques like frequency foldback and green mode operation, which help optimize power efficiency at light loads.
Q: Can UCC28503N handle high input voltages? A: Yes, UCC28503N has a wide input voltage range of up to 100V, making it suitable for applications with higher input voltages.
Q: Does UCC28503N provide protection features? A: Yes, UCC28503N offers comprehensive protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.
Q: How can I adjust the switching frequency of UCC28503N? A: The switching frequency can be adjusted by connecting an external resistor and capacitor to the RT/CT pin of UCC28503N.
Q: Is UCC28503N compatible with both continuous and discontinuous conduction modes? A: Yes, UCC28503N supports both continuous and discontinuous conduction modes, providing flexibility in different load conditions.
Q: Can UCC28503N be used in automotive applications? A: No, UCC28503N is not specifically designed for automotive applications and may not meet the required automotive standards.
Q: Are there any evaluation boards or reference designs available for UCC28503N? A: Yes, Texas Instruments provides evaluation boards and reference designs that can help users quickly prototype and implement UCC28503N-based solutions.
Please note that these answers are general and may vary depending on specific application requirements. It's always recommended to refer to the datasheet and application notes for detailed information.