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UCC28085PWRG4
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UCC28085PWRG4

Product Overview

Category

UCC28085PWRG4 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

  • High efficiency: UCC28085PWRG4 offers excellent power conversion efficiency, reducing energy losses.
  • Wide input voltage range: It can handle a wide range of input voltages, making it suitable for different power supply applications.
  • Protection features: The IC incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown.
  • Low standby power consumption: UCC28085PWRG4 minimizes power consumption during standby mode, enhancing energy efficiency.

Package

UCC28085PWRG4 is available in a small-sized surface-mount package, known as TSSOP-20. This package ensures easy integration onto printed circuit boards (PCBs) and efficient heat dissipation.

Essence

The essence of UCC28085PWRG4 lies in its ability to regulate and control power flow efficiently, ensuring stable and reliable operation of power supply systems.

Packaging/Quantity

UCC28085PWRG4 is typically supplied in reels containing 2500 units per reel.

Specifications

  • Input Voltage Range: 8V to 16V
  • Output Voltage Range: 0V to 5V
  • Maximum Output Current: 2A
  • Switching Frequency: 100kHz to 1MHz
  • Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

  1. VDD: Power supply voltage input
  2. GND: Ground reference
  3. FB: Feedback pin for regulating output voltage
  4. COMP: Compensation pin for stability control
  5. CS: Current sense input for current regulation
  6. RT/CT: Timing components connection for setting switching frequency and soft-start time
  7. SS/TRISET: Soft-start and tri-state control pin
  8. EN/UVLO: Enable and undervoltage lockout control pin
  9. VREF: Reference voltage output
  10. VSENSE: Voltage sense input for feedback loop
  11. ISENSE: Current sense input for feedback loop
  12. SYNC: Synchronization input for external clock synchronization
  13. DRVH: High-side gate driver output
  14. DRVL: Low-side gate driver output
  15. BOOT: Bootstrap capacitor connection for high-side gate driver
  16. HO: High-side MOSFET output
  17. LO: Low-side MOSFET output
  18. VCC: Supply voltage for gate drivers
  19. PGND: Power ground reference
  20. NC: No connection

Functional Features

  1. Voltage Regulation: UCC28085PWRG4 provides precise voltage regulation, ensuring stable output voltages even under varying load conditions.
  2. Current Regulation: The IC incorporates current sensing mechanisms to regulate the output current, preventing overloading and protecting the power supply system.
  3. Soft-Start: UCC28085PWRG4 features a soft-start function that gradually ramps up the output voltage during startup, reducing inrush currents and enhancing system reliability.
  4. Protection Mechanisms: This IC includes various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown, safeguarding the power supply system from potential damage.
  5. Synchronization: UCC28085PWRG4 allows synchronization with an external clock signal, enabling precise timing control in multi-phase power supply systems.

Advantages and Disadvantages

Advantages

  • High efficiency leads to reduced energy losses.
  • Wide input voltage range allows for versatile applications.
  • Comprehensive protection mechanisms enhance system reliability.
  • Small package size facilitates easy integration onto PCBs.

Disadvantages

  • Limited maximum output current may restrict usage in high-power applications.
  • Requires external timing components for frequency and soft-start time configuration.

Working Principles

UCC28085PWRG4 operates based on the principle of pulse-width modulation (PWM). It regulates the output voltage by controlling the duty cycle of the switching waveform. By adjusting the duty cycle, the IC maintains a stable output voltage regardless of load variations. The feedback loop continuously monitors the output voltage and adjusts the duty cycle accordingly.

During startup, the soft-start function gradually increases the duty cycle, preventing excessive inrush currents that could damage the power supply system or connected devices. The IC also incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown to ensure safe operation under abnormal conditions.

Detailed Application Field Plans

UCC28085PWRG4 finds extensive application in the following fields:

  1. Switch-Mode Power Supplies:

Énumérez 10 questions et réponses courantes liées à l'application de UCC28085PWRG4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC28085PWRG4 in technical solutions:

  1. Q: What is UCC28085PWRG4? A: UCC28085PWRG4 is a pulse width modulation (PWM) controller IC used for controlling power converters in various applications.

  2. Q: What are the key features of UCC28085PWRG4? A: Some key features include integrated high-voltage startup, cycle-by-cycle current limit, adjustable frequency, soft-start, and protection features like overvoltage and undervoltage lockout.

  3. Q: What types of power converters can UCC28085PWRG4 be used in? A: UCC28085PWRG4 can be used in various power converter topologies such as flyback, forward, and half-bridge converters.

  4. Q: How does UCC28085PWRG4 help in improving power conversion efficiency? A: UCC28085PWRG4 provides advanced control techniques like frequency foldback and valley switching that help optimize power conversion efficiency.

  5. Q: Can UCC28085PWRG4 handle high input voltages? A: Yes, UCC28085PWRG4 has a wide input voltage range of up to 600V, making it suitable for high-voltage applications.

  6. Q: Does UCC28085PWRG4 have any protection features? A: Yes, UCC28085PWRG4 includes protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  7. Q: How can I adjust the switching frequency of UCC28085PWRG4? A: The switching frequency of UCC28085PWRG4 can be adjusted by changing the value of an external resistor connected to the RT pin.

  8. Q: Can UCC28085PWRG4 operate in a wide temperature range? A: Yes, UCC28085PWRG4 has a wide operating temperature range of -40°C to 125°C, making it suitable for various environments.

  9. Q: What is the maximum output power that UCC28085PWRG4 can handle? A: The maximum output power depends on the specific application and design considerations. Please refer to the datasheet and application notes for detailed guidelines.

  10. Q: Are there any evaluation boards or reference designs available for UCC28085PWRG4? A: Yes, Texas Instruments provides evaluation boards and reference designs that can help users quickly prototype and implement solutions using UCC28085PWRG4.

Please note that these answers are general and may vary depending on the specific requirements and application context. It's always recommended to refer to the datasheet and consult with technical experts for accurate information.