UCC38085DR
Overview
Category: Integrated Circuit (IC)
Use: Power Management
Characteristics: - High-performance current mode PWM controller - Designed for off-line and DC-to-DC converter applications - Provides necessary features to implement a highly efficient power supply - Offers protection features such as overvoltage, undervoltage, and overcurrent protection
Package: SOIC-8
Essence: UCC38085DR is an integrated circuit that serves as a high-performance current mode PWM controller for power management applications.
Packaging/Quantity: The UCC38085DR is typically sold in reels of 2500 units.
Specifications
- Input Voltage Range: 7 V to 20 V
- Output Voltage Range: 0.5 V to 18 V
- Operating Temperature Range: -40°C to 125°C
- Switching Frequency Range: 50 kHz to 1 MHz
- Maximum Duty Cycle: 100%
- Supply Current: 4 mA
Pin Configuration
The UCC38085DR has the following pin configuration:
- COMP: Compensation pin
- FB: Feedback pin
- CS: Current sense pin
- GND: Ground pin
- VREF: Reference voltage pin
- VDD: Supply voltage pin
- OUT: Output pin
- RT/CT: Timing resistor/capacitor pin
Functional Features
- Current Mode Control: The UCC38085DR utilizes current mode control to regulate the output voltage and maintain stability.
- Protection Features: It offers various protection features such as overvoltage, undervoltage, and overcurrent protection, ensuring the safety and reliability of the power supply.
- Wide Input Voltage Range: With an input voltage range of 7 V to 20 V, the UCC38085DR can be used in a variety of applications.
- Adjustable Output Voltage: The output voltage can be adjusted from 0.5 V to 18 V, providing flexibility in power supply design.
Advantages and Disadvantages
Advantages: - High-performance current mode PWM controller - Wide input voltage range - Adjustable output voltage - Protection features for enhanced safety
Disadvantages: - Limited maximum duty cycle (100%) - Requires external timing resistor and capacitor for operation
Working Principles
The UCC38085DR operates based on the current mode control principle. It compares the feedback voltage with the reference voltage to regulate the output voltage. By adjusting the duty cycle of the PWM signal, it controls the power delivered to the load. The device continuously monitors the current sense pin to provide overcurrent protection. It also incorporates various protection features to ensure safe and reliable operation.
Detailed Application Field Plans
The UCC38085DR is commonly used in the following applications:
- Switching Power Supplies
- DC-to-DC Converters
- Offline Power Supplies
- LED Lighting Systems
- Industrial Control Systems
Detailed and Complete Alternative Models
Some alternative models that can be considered as alternatives to the UCC38085DR are:
- UC3843: Current Mode PWM Controller
- TL494: Pulse Width Modulation Control Circuit
- SG3525: Voltage Mode PWM Controller
- IRS2153D: Half-Bridge Driver IC
These alternative models offer similar functionality and can be used as substitutes depending on specific requirements.
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רשום 10 שאלות ותשובות נפוצות הקשורות ליישום של UCC38085DR בפתרונות טכניים
Sure! Here are 10 common questions and answers related to the application of UCC38085DR in technical solutions:
Q: What is UCC38085DR? A: UCC38085DR is a high-performance current-mode PWM controller used for controlling power supplies in various applications.
Q: What are the key features of UCC38085DR? A: Some key features include adjustable frequency operation, soft-start capability, cycle-by-cycle current limiting, and integrated high-voltage startup circuitry.
Q: What is the typical input voltage range for UCC38085DR? A: The typical input voltage range is between 9V and 18V.
Q: Can UCC38085DR handle high output currents? A: Yes, UCC38085DR can handle high output currents up to several amps depending on the external components used.
Q: How does UCC38085DR provide protection against overcurrent conditions? A: UCC38085DR incorporates cycle-by-cycle current limiting, which helps protect the power supply against overcurrent conditions.
Q: Can UCC38085DR operate in a wide temperature range? A: Yes, UCC38085DR is designed to operate in a wide temperature range, typically from -40°C to 125°C.
Q: Does UCC38085DR have any built-in protection features? A: Yes, UCC38085DR includes features like overvoltage protection, undervoltage lockout, and thermal shutdown to ensure safe operation.
Q: Can UCC38085DR be used in both isolated and non-isolated power supply designs? A: Yes, UCC38085DR can be used in both isolated and non-isolated power supply designs, making it versatile for various applications.
Q: What is the maximum switching frequency of UCC38085DR? A: The maximum switching frequency of UCC38085DR is typically around 1 MHz.
Q: Are there any application notes or reference designs available for UCC38085DR? A: Yes, Texas Instruments provides application notes and reference designs that can help in implementing UCC38085DR in different technical solutions.
Please note that the answers provided here are general and may vary depending on specific design requirements and application scenarios. It's always recommended to refer to the datasheet and relevant documentation for accurate information.