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UCC2802N - English Editing Encyclopedia Entry
Product Overview
Category: Integrated Circuit (IC)
Use: Voltage Mode PWM Controller
Characteristics: - High-performance voltage mode controller - Designed for offline and DC-to-DC power supplies - Provides precise control of power supply output voltage and current
Package: PDIP-8 (Plastic Dual In-Line Package)
Essence: The UCC2802N is a voltage mode PWM controller that offers high-performance control for power supply applications. It is widely used in offline and DC-to-DC power supplies to regulate the output voltage and current.
Packaging/Quantity: The UCC2802N is available in a PDIP-8 package, which consists of a plastic body with two rows of pins. It is commonly sold in reels or tubes containing multiple units.
Specifications
The UCC2802N has the following specifications:
- Supply Voltage Range: 7V to 25V
- Operating Temperature Range: -40°C to 85°C
- Maximum Duty Cycle: 100%
- Oscillator Frequency Range: 50kHz to 500kHz
- Output Current: ±1A
- Error Amplifier Gain Bandwidth: 2MHz
Pin Configuration
The UCC2802N features an 8-pin configuration as follows:
- COMP: Compensation pin for error amplifier
- FB: Feedback pin for regulating output voltage
- CS: Current sense pin for monitoring output current
- GND: Ground reference pin
- VREF: Reference voltage pin
- RT/CT: Timing resistor/capacitor connection pin for oscillator frequency adjustment
- OUT: Output pin for driving external power devices
- VCC: Power supply input pin
Functional Features
The UCC2802N offers the following functional features:
- Voltage mode control for precise regulation of output voltage and current
- Error amplifier with compensation pin for stability and accuracy
- Current sense pin for monitoring and limiting output current
- Oscillator frequency adjustment for flexible design optimization
- Output pin capable of driving external power devices
Advantages and Disadvantages
Advantages: - High-performance voltage mode control for accurate power supply regulation - Wide operating temperature range for versatile applications - Flexible oscillator frequency adjustment for design optimization - Compact PDIP-8 package for easy integration
Disadvantages: - Limited output current capability (±1A) - Requires additional external components for complete power supply implementation
Working Principles
The UCC2802N operates based on the voltage mode control principle. It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal, which controls the power devices in the power supply circuit. By continuously monitoring and adjusting the duty cycle, the UCC2802N ensures precise regulation of the output voltage and current.
Detailed Application Field Plans
The UCC2802N finds extensive application in various power supply systems, including but not limited to: - Offline AC-DC converters - DC-DC converters - Switching power supplies - Battery chargers - LED drivers - Industrial power equipment
Its high-performance voltage mode control, compact package, and wide operating temperature range make it suitable for both consumer and industrial applications.
Detailed and Complete Alternative Models
Some alternative models that offer similar functionality to the UCC2802N include: - UC3842 - TL494 - SG3525 - MC34063
These alternatives can be considered based on specific design requirements and availability.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de UCC2802N en soluciones técnicas
Sure! Here are 10 common questions and answers related to the application of UCC2802N in technical solutions:
Q: What is UCC2802N? A: UCC2802N is a pulse width modulation (PWM) controller IC commonly used in power supply applications.
Q: What is the operating voltage range of UCC2802N? A: The operating voltage range of UCC2802N is typically between 8V and 35V.
Q: What is the purpose of using UCC2802N in power supply designs? A: UCC2802N is used to regulate and control the output voltage and current of power supplies, ensuring stable and efficient operation.
Q: Can UCC2802N be used in both AC-DC and DC-DC power supply designs? A: Yes, UCC2802N can be used in both AC-DC and DC-DC power supply designs, making it versatile for various applications.
Q: What is the maximum switching frequency supported by UCC2802N? A: The maximum switching frequency supported by UCC2802N is typically around 500kHz.
Q: How does UCC2802N provide protection features for power supplies? A: UCC2802N offers protection features such as overvoltage protection, undervoltage lockout, and overcurrent protection to safeguard the power supply and connected components.
Q: Can UCC2802N be used in high-power applications? A: Yes, UCC2802N can be used in high-power applications by utilizing external power devices such as MOSFETs or IGBTs.
Q: Does UCC2802N support soft-start functionality? A: Yes, UCC2802N supports soft-start functionality, allowing for a gradual increase in output voltage during power-up to prevent excessive inrush current.
Q: What is the typical efficiency of power supplies using UCC2802N? A: The efficiency of power supplies using UCC2802N can vary depending on the design and load conditions but is typically above 90%.
Q: Are there any application notes or reference designs available for UCC2802N? A: Yes, Texas Instruments provides application notes and reference designs for UCC2802N, which can be helpful in understanding its implementation in various technical solutions.
Please note that the answers provided here are general and may vary based on specific design requirements and datasheet specifications.