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UCC28501DWTRG4
Overview
Category: Integrated Circuit (IC)
Use: Voltage Mode PWM Controller
Characteristics: - High-performance voltage mode controller - Designed for offline flyback converters - Provides precise regulation of output voltage and current - Offers excellent line and load regulation - Enables efficient power conversion
Package: SOIC-16
Essence: The UCC28501DWTRG4 is a voltage mode PWM controller that is widely used in offline flyback converters. It provides accurate regulation of output voltage and current, ensuring excellent line and load regulation. With its high-performance capabilities, this IC enables efficient power conversion.
Packaging/Quantity: The UCC28501DWTRG4 is available in a SOIC-16 package. It is typically sold in reels containing a quantity of 2500 units.
Specifications
- Input Voltage Range: 9V to 30V
- Output Voltage Range: 5V to 24V
- Maximum Duty Cycle: 100%
- Operating Temperature Range: -40°C to 125°C
- Switching Frequency: Up to 1MHz
- Error Amplifier Bandwidth: 10kHz
- Soft Start Time: Adjustable
Pin Configuration
The UCC28501DWTRG4 has the following pin configuration:
___________
| |
NC |1 16| VDD
FB |2 15| COMP
CS |3 14| GND
RT |4 13| SS/TR/UVLO
VREF |5 12| SYNC
EN |6 11| DRVH
VIN |7 10| DRVL
NC |8 9| NC
|___________|
Functional Features
- Voltage mode control with precise regulation
- Adjustable soft start time for controlled startup
- Synchronization capability for multi-phase operation
- Overvoltage protection (OVP) and undervoltage lockout (UVLO)
- Error amplifier with wide bandwidth for accurate feedback control
- Adaptive dead-time control for improved efficiency
- Integrated gate drivers for external MOSFETs
Advantages and Disadvantages
Advantages: - High-performance voltage mode controller - Excellent line and load regulation - Efficient power conversion - Wide input and output voltage range - Adjustable soft start time - Synchronization capability for multi-phase operation
Disadvantages: - Limited maximum duty cycle of 100% - Requires external MOSFETs for power switching
Working Principles
The UCC28501DWTRG4 operates on the principle of voltage mode control. It compares the output voltage to a reference voltage and adjusts the duty cycle of the PWM signal accordingly to regulate the output voltage. The error amplifier provides feedback control, ensuring precise regulation. The integrated gate drivers drive external MOSFETs to switch the power in the flyback converter.
Detailed Application Field Plans
The UCC28501DWTRG4 is commonly used in various applications, including: 1. AC/DC power supplies 2. LED lighting systems 3. Battery chargers 4. Industrial automation equipment 5. Telecom power modules
Detailed and Complete Alternative Models
Some alternative models that can be considered as alternatives to the UCC28501DWTRG4 are: 1. UC3843: A popular voltage mode PWM controller with similar features. 2. LT1241: A high-performance PWM controller suitable for offline flyback converters. 3. SG3525: A versatile PWM controller widely used in power electronics applications. 4. FAN7529: An integrated circuit designed for offline flyback converters with built-in protection features.
These alternative models offer similar functionality and can be used as substitutes depending on specific requirements and design considerations.
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Перечислите 10 распространенных вопросов и ответов, связанных с применением UCC28501DWTRG4 в технических решениях.
Sure! Here are 10 common questions and answers related to the application of UCC28501DWTRG4:
Q: What is UCC28501DWTRG4? A: UCC28501DWTRG4 is a high-performance, low-power current mode PWM controller used in various power supply applications.
Q: What are the key features of UCC28501DWTRG4? 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 UCC28501DWTRG4? A: UCC28501DWTRG4 is commonly used in offline flyback converters, LED lighting drivers, and other isolated or non-isolated power supply designs.
Q: How does UCC28501DWTRG4 achieve cycle-by-cycle current limit? A: UCC28501DWTRG4 utilizes a current sense resistor in series with the power MOSFET to monitor the current flowing through it and provides cycle-by-cycle current limiting.
Q: Can UCC28501DWTRG4 operate at high switching frequencies? A: Yes, UCC28501DWTRG4 can operate at switching frequencies up to several hundred kilohertz, making it suitable for both low and high power applications.
Q: Does UCC28501DWTRG4 have built-in protection features? A: Yes, UCC28501DWTRG4 includes features like overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown to ensure safe operation.
Q: Can UCC28501DWTRG4 be used in both isolated and non-isolated power supplies? A: Yes, UCC28501DWTRG4 can be used in both isolated and non-isolated power supply designs, depending on the specific application requirements.
Q: What is the maximum output power that UCC28501DWTRG4 can handle? A: The maximum output power depends on the specific design and external components used with UCC28501DWTRG4. It can handle power levels ranging from a few watts to several hundred watts.
Q: Is UCC28501DWTRG4 suitable for high-efficiency applications? A: Yes, UCC28501DWTRG4 offers excellent efficiency due to its low-power operation and various control features, making it suitable for high-efficiency power supply designs.
Q: Are there any application notes or reference designs available for UCC28501DWTRG4? A: Yes, Texas Instruments provides application notes, reference designs, and evaluation modules that can help users understand and implement UCC28501DWTRG4 in their designs effectively.
Please note that these answers are general and may vary based on specific design considerations and requirements.