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UCC38085PWR
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UCC38085PWR

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: TSSOP-16

Essence: The UCC38085PWR is an integrated circuit that serves as a high-performance current mode PWM controller. It is commonly used in power management applications to implement efficient power supplies.

Packaging/Quantity: The UCC38085PWR is available in a TSSOP-16 package. It is typically sold in reels or tubes containing multiple units.

Specifications

The UCC38085PWR has the following specifications:

  • Supply Voltage Range: 8V to 18V
  • Operating Temperature Range: -40°C to 125°C
  • Maximum Duty Cycle: 100%
  • Oscillator Frequency Range: 50kHz to 1MHz
  • Output Current: ±1A
  • Error Amplifier Bandwidth: 10kHz
  • Soft Start Time: Adjustable

Pin Configuration

The UCC38085PWR has a TSSOP-16 package with the following pin configuration:

  1. VREF
  2. COMP
  3. FB
  4. CS
  5. SS/TR
  6. RT/CT
  7. GND
  8. VDD
  9. OUT
  10. SYNC
  11. UVLO
  12. OVLO
  13. OVP
  14. EN/UV
  15. NC
  16. NC

Functional Features

The UCC38085PWR offers the following functional features:

  1. Current Mode Control: Utilizes current sensing to regulate the output voltage and maintain stability.
  2. Protection Features: Provides overvoltage, undervoltage, and overcurrent protection to safeguard the power supply and connected components.
  3. Adjustable Soft Start: Allows for a controlled startup of the power supply, reducing stress on components and preventing excessive inrush current.
  4. Frequency Modulation: Enables frequency modulation to reduce electromagnetic interference (EMI) emissions.
  5. Synchronization Capability: Supports synchronization with an external clock source for multi-phase operation or noise reduction.

Advantages and Disadvantages

Advantages: - High-performance PWM controller for efficient power supply implementation - Offers various protection features for enhanced reliability - Adjustable soft start for controlled startup - Frequency modulation capability for reduced EMI emissions - Synchronization capability for multi-phase operation or noise reduction

Disadvantages: - Limited output current capacity (±1A) - Requires additional external components for complete power supply implementation

Working Principles

The UCC38085PWR operates based on the current mode control principle. It regulates the output voltage by sensing the current flowing through the power supply and adjusting the duty cycle of the PWM signal accordingly. This control mechanism ensures stability and accurate voltage regulation.

The IC also incorporates various protection features such as overvoltage, undervoltage, and overcurrent protection. These safeguards help prevent damage to the power supply and connected devices in case of abnormal operating conditions.

Additionally, the UCC38085PWR allows for adjustable soft start, which gradually ramps up the output voltage during startup. This feature reduces stress on components and prevents excessive inrush current.

Detailed Application Field Plans

The UCC38085PWR is commonly used in the following application fields:

  1. Switched-Mode Power Supplies (SMPS): The IC is widely employed in designing and implementing SMPS for various applications, including consumer electronics, industrial equipment, and telecommunications.
  2. LED Lighting: The UCC38085PWR can be utilized in LED driver circuits to efficiently regulate the power supply for LED lighting systems.
  3. Battery Chargers: It is suitable for designing battery chargers that require efficient power management and protection features.
  4. DC-to-DC Converters: The IC can be employed in DC-to-DC converter circuits to efficiently step up or step down the voltage levels as required.

Detailed and Complete Alternative Models

Some alternative models to the UCC38085PWR include:

  1. UCC28085PWR: Similar to UCC38085PWR but with a wider operating temperature range (-40°C to 150°C).
  2. UC3845BNG: A current mode PWM controller with similar functionality but available in a DIP-8 package.
  3. LM5035MTCX/NOPB: A high-performance current mode PWM controller with adjustable frequency and synchronization capability.

These alternative models offer similar functionalities and can be considered based on specific application requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de UCC38085PWR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC38085PWR in technical solutions:

  1. Q: What is UCC38085PWR? A: UCC38085PWR is a pulse width modulation (PWM) controller IC used for controlling power converters in various applications.

  2. Q: What are the key features of UCC38085PWR? A: Some key features include adjustable frequency operation, soft-start capability, cycle-by-cycle current limiting, and integrated high-voltage startup circuitry.

  3. Q: What is the typical input voltage range for UCC38085PWR? A: The typical input voltage range is between 9V and 18V.

  4. Q: Can UCC38085PWR be used in both buck and boost converter topologies? A: Yes, UCC38085PWR can be used in both buck and boost converter topologies.

  5. Q: How does UCC38085PWR handle overcurrent protection? A: UCC38085PWR incorporates cycle-by-cycle current limiting to protect against overcurrent conditions.

  6. Q: Does UCC38085PWR have any built-in protection features? A: Yes, UCC38085PWR includes features like undervoltage lockout (UVLO), thermal shutdown, and overvoltage protection.

  7. Q: What is the maximum switching frequency supported by UCC38085PWR? A: The maximum switching frequency supported is typically around 1 MHz.

  8. Q: Can UCC38085PWR operate in continuous or discontinuous conduction mode? A: UCC38085PWR can operate in both continuous and discontinuous conduction modes depending on the application requirements.

  9. Q: What is the output voltage range that UCC38085PWR can support? A: The output voltage range depends on the external components used in the power converter circuit.

  10. Q: Are there any application notes or reference designs available for UCC38085PWR? A: Yes, Texas Instruments provides application notes and reference designs that can help with the implementation of UCC38085PWR in various technical solutions.

Please note that these answers are general and may vary depending on specific design considerations and requirements. It's always recommended to refer to the datasheet and application notes provided by the manufacturer for detailed information.