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UCC2817AN
Overview
Category: Integrated Circuit (IC)
Use: Voltage Mode PWM Controller
Characteristics: - High-performance voltage mode controller - Designed for use in switch-mode power supplies - Provides precise control of output voltage and current - Offers protection features for safe operation - Suitable for various applications requiring efficient power conversion
Package: PDIP-16 (Plastic Dual In-Line Package)
Essence: UCC2817AN is a voltage mode PWM controller that enables efficient power conversion in switch-mode power supplies. It offers precise control over the output voltage and current, ensuring optimal performance and protection.
Packaging/Quantity: UCC2817AN is typically sold in reels or tubes containing 50 units per package.
Specifications
- Input Voltage Range: 8V to 35V
- Output Voltage Range: 0V to 5.1V
- Operating Temperature Range: -40°C to 85°C
- Maximum Duty Cycle: 100%
- Oscillator Frequency Range: 50kHz to 500kHz
- Output Current: Up to 1A
Pin Configuration
UCC2817AN has a total of 16 pins arranged as follows:
```
| | | 1 2 3 4 5 6 7 8 | | | | 9 10 11 12 13 14 15 16 | | |
```
Pin Description: 1. VREF: Reference Voltage Input 2. COMP: Error Amplifier Output 3. FB: Feedback Input 4. RT/CT: Timing Components Connection 5. CT: Timing Capacitor Connection 6. RT: Timing Resistor Connection 7. OSC: Oscillator Timing Capacitor Connection 8. GND: Ground 9. VCC: Power Supply Input 10. SYNC: Synchronization Input 11. SD: Shutdown Input 12. CS: Current Sense Input 13. SS/TR: Soft-Start/Tracking Input 14. OUT: Output 15. NC: No Connection 16. NC: No Connection
Functional Features
- Voltage Mode Control: UCC2817AN utilizes voltage mode control to regulate the output voltage of switch-mode power supplies accurately.
- Precise Current Limiting: The controller incorporates a current sense input (CS) for precise current limiting, ensuring safe operation and protection against overcurrent conditions.
- Soft-Start Functionality: The soft-start input (SS/TR) allows for a controlled startup, reducing inrush current and preventing excessive stress on components.
- Synchronization Capability: The synchronization input (SYNC) enables synchronization with an external clock signal, facilitating coordination with other system components.
- Shutdown Feature: The shutdown input (SD) allows for easy system shutdown or standby mode activation.
Advantages and Disadvantages
Advantages: - High-performance voltage mode control for efficient power conversion - Precise output voltage and current regulation - Protection features ensure safe operation - Suitable for various applications requiring efficient power conversion
Disadvantages: - Limited output current capacity (up to 1A) - Requires additional external components for complete functionality
Working Principles
UCC2817AN operates based on the voltage mode control technique. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified by the error amplifier (COMP) and used to adjust the duty cycle of the PWM signal. By modulating the duty cycle, the controller regulates the output voltage and current of the switch-mode power supply.
Application Field Plans
UCC2817AN finds applications in various fields, including: 1. Switch-mode power supplies for consumer electronics 2. Industrial power systems 3. Automotive power electronics 4. LED lighting systems 5. Renewable energy systems
Alternative Models
Some alternative models that can be considered as alternatives to UCC2817AN are: - UCC3817AN - UC3842AN - TL494CN - SG3525AN
These models offer similar functionality and can be used as replacements depending on specific requirements and availability.
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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de UCC2817AN en soluciones técnicas
Sure! Here are 10 common questions and answers related to the application of UCC2817AN in technical solutions:
Q: What is UCC2817AN? A: UCC2817AN is a pulse width modulation (PWM) controller IC used for controlling power converters in various applications.
Q: What are the key features of UCC2817AN? A: Some key features include adjustable frequency, soft-start capability, cycle-by-cycle current limiting, and overvoltage protection.
Q: How does UCC2817AN help in power converter designs? A: UCC2817AN provides precise control over the switching frequency and duty cycle of power converters, ensuring efficient power conversion.
Q: Can UCC2817AN be used in both buck and boost converter designs? A: Yes, UCC2817AN can be used in both buck and boost converter designs, as well as other topologies like flyback and forward converters.
Q: How does UCC2817AN handle soft-start functionality? A: UCC2817AN incorporates a soft-start circuit that gradually ramps up the output voltage during startup, preventing excessive inrush current.
Q: Does UCC2817AN have any protection features? A: Yes, UCC2817AN includes cycle-by-cycle current limiting and overvoltage protection to safeguard the power converter and connected components.
Q: What is the maximum operating frequency of UCC2817AN? A: The maximum operating frequency of UCC2817AN is typically around 1 MHz, making it suitable for high-frequency power converter designs.
Q: Can UCC2817AN operate with wide input voltage ranges? A: Yes, UCC2817AN can operate with wide input voltage ranges, typically from a few volts up to several hundred volts.
Q: Are there any application notes or reference designs available for UCC2817AN? A: Yes, Texas Instruments provides application notes and reference designs that help in implementing UCC2817AN in various power converter applications.
Q: Where can I purchase UCC2817AN? A: UCC2817AN can be purchased from authorized distributors of Texas Instruments or other electronic component suppliers.