UCC2808AN-1G4
Product Overview
Category
UCC2808AN-1G4 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
- Low-power current mode PWM controller
- Wide input voltage range: 2.7V to 12V
- Adjustable frequency up to 1MHz
- Integrated error amplifier with precise reference voltage
- Internal soft-start function for controlled startup
- Overcurrent protection and thermal shutdown features
- High efficiency and excellent line/load regulation
Package and Quantity
UCC2808AN-1G4 is available in a small outline integrated circuit (SOIC) package. It typically comes in reels or tubes containing a quantity of 2500 units per package.
Specifications
- Input Voltage Range: 2.7V to 12V
- Output Voltage Range: 0V to VCC
- Maximum Operating Temperature: 125°C
- Frequency Range: Up to 1MHz
- Duty Cycle Range: 0% to 100%
- Error Amplifier Gain: 80dB
- Soft-Start Time: 10ms
- Quiescent Current: 200µA
Pin Configuration
The UCC2808AN-1G4 IC has eight pins arranged as follows:
___________
| |
NC |1 8| VCC
FB |2 7| GND
CS |3 6| COMP
RT |4 5| SS/TR/UVLO
|___________|
- NC: No Connection
- FB: Feedback Pin for voltage regulation
- CS: Current Sense Pin for current regulation
- RT: Timing Resistor Pin for frequency control
- SS/TR/UVLO: Soft-Start, Tracking, and Undervoltage Lockout Pin
- COMP: Compensation Pin for stability
Functional Features
- Current Mode Control: UCC2808AN-1G4 utilizes a current mode control scheme to regulate the output voltage or current accurately.
- Wide Input Voltage Range: The IC can operate within a wide input voltage range of 2.7V to 12V, making it suitable for various power supply applications.
- Adjustable Frequency: The frequency of operation can be adjusted up to 1MHz, allowing flexibility in designing different power supply systems.
- Integrated Error Amplifier: The built-in error amplifier ensures precise voltage regulation by comparing the feedback signal with a reference voltage.
- Soft-Start Function: The internal soft-start function enables controlled startup, preventing excessive inrush current during power-up.
- Protection Mechanisms: UCC2808AN-1G4 incorporates overcurrent protection and thermal shutdown features, enhancing system reliability.
- High Efficiency: The IC offers high efficiency and excellent line/load regulation, contributing to energy-saving and stable power supply performance.
Advantages and Disadvantages
Advantages
- Wide input voltage range allows compatibility with various power sources.
- Adjustable frequency provides flexibility in power supply design.
- Integrated error amplifier ensures accurate voltage regulation.
- Soft-start function prevents excessive inrush current during startup.
- Protection mechanisms enhance system reliability.
- High efficiency and excellent regulation contribute to energy-saving.
Disadvantages
- Limited maximum operating temperature (125°C) may restrict usage in high-temperature environments.
- Requires external components for complete power supply implementation.
Working Principles
UCC2808AN-1G4 operates based on the current mode control principle. It compares the output voltage or current with a reference signal and adjusts the duty cycle of the PWM (Pulse Width Modulation) signal accordingly. This control mechanism ensures stable and accurate regulation of the power supply output.
The IC utilizes an internal error amplifier to compare the feedback signal from the FB pin with a precise reference voltage. The resulting error signal is then processed to generate the PWM signal, controlling the power switch in the power supply system.
Application Field Plans
UCC2808AN-1G4 finds extensive application in various power management systems, including: 1. Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial applications. 2. Battery chargers for portable devices, electric vehicles, and renewable energy systems. 3. LED drivers for lighting applications, such as streetlights, automotive lighting, and display backlighting.
Alternative Models
For similar power management applications, alternative models to UCC2808AN-1G4 include: 1. UCC2808A: Similar features and specifications, but available in different package options. 2. U
Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi UCC2808AN-1G4 dalam penyelesaian teknikal
Sure! Here are 10 common questions and answers related to the application of UCC2808AN-1G4 in technical solutions:
Q1: What is UCC2808AN-1G4? A1: UCC2808AN-1G4 is a specific model of integrated circuit (IC) that belongs to the UCC2808 family. It is a high-performance, low-power, current-mode PWM controller used in various power supply applications.
Q2: What are the key features of UCC2808AN-1G4? A2: Some key features of UCC2808AN-1G4 include low start-up current, internal soft-start, cycle-by-cycle current limiting, adjustable frequency up to 1MHz, and built-in undervoltage lockout.
Q3: What are the typical applications of UCC2808AN-1G4? A3: UCC2808AN-1G4 is commonly used in offline flyback converters, LED drivers, battery chargers, and other power supply applications where high efficiency and precise control are required.
Q4: How does UCC2808AN-1G4 help in improving power supply efficiency? A4: UCC2808AN-1G4 utilizes current-mode control, which allows for better regulation and faster response to load changes. This helps in achieving higher power supply efficiency.
Q5: Can UCC2808AN-1G4 operate with wide input voltage ranges? A5: Yes, UCC2808AN-1G4 can operate with wide input voltage ranges, typically from 4.5V to 28V, making it suitable for a variety of power supply designs.
Q6: Does UCC2808AN-1G4 have protection features? A6: Yes, UCC2808AN-1G4 incorporates various protection features such as overvoltage protection, undervoltage lockout, cycle-by-cycle current limiting, and thermal shutdown to ensure safe operation.
Q7: How can I adjust the switching frequency of UCC2808AN-1G4? A7: The switching frequency of UCC2808AN-1G4 can be adjusted by changing the value of an external timing resistor connected to the RT pin. Higher resistance values result in lower frequencies.
Q8: Can UCC2808AN-1G4 drive high-power loads directly? A8: No, UCC2808AN-1G4 is a controller IC and requires external power devices such as MOSFETs or IGBTs to drive high-power loads. It provides the control signals for these devices.
Q9: Is UCC2808AN-1G4 available in different package options? A9: Yes, UCC2808AN-1G4 is available in various package options, including SOIC-8 and PDIP-8, allowing flexibility in board layout and assembly.
Q10: Where can I find more information about UCC2808AN-1G4? A10: You can refer to the datasheet provided by the manufacturer, Texas Instruments, for detailed information about UCC2808AN-1G4, including electrical characteristics, application notes, and design considerations.
Please note that the answers provided here are general and may vary depending on specific requirements and applications.