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UCC28221PWRG4
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UCC28221PWRG4 - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High-performance current mode PWM controller - Designed for offline flyback converters - Provides precise control of the output voltage and current

Package: TSSOP-14

Essence: The UCC28221PWRG4 is a power management IC that offers high-performance current mode PWM control for offline flyback converters. It ensures precise control of the output voltage and current, making it suitable for various power management applications.

Packaging/Quantity: The UCC28221PWRG4 is available in a TSSOP-14 package. It is typically sold in reels or tubes containing multiple units.

Specifications

The UCC28221PWRG4 has the following specifications:

  • Input Voltage Range: 8 V to 18 V
  • Output Voltage Range: 0 V to 15 V
  • Maximum Switching Frequency: 1 MHz
  • Operating Temperature Range: -40°C to +125°C
  • Features integrated protection functions such as overvoltage protection, undervoltage lockout, and thermal shutdown.

Pin Configuration

The UCC28221PWRG4 has a TSSOP-14 package with the following pin configuration:

  1. COMP: Compensation pin for loop stability.
  2. CS: Current sense input for current mode control.
  3. FB: Feedback pin for regulating the output voltage.
  4. GND: Ground reference for the IC.
  5. RT/CLK: Timing resistor/capacitor connection or external clock input.
  6. SS/TR: Soft-start/tracking pin for controlling the start-up behavior.
  7. VCC: Supply voltage input for the IC.
  8. DRVH: High-side gate driver output.
  9. DRVL: Low-side gate driver output.
  10. VREF: Reference voltage output for the IC.
  11. UVLO: Undervoltage lockout pin for controlling the start-up behavior.
  12. OVP: Overvoltage protection pin for protecting against excessive output voltage.
  13. EN/UV: Enable/undervoltage lockout control pin.
  14. PGND: Power ground reference for the IC.

Functional Features

The UCC28221PWRG4 offers the following functional features:

  1. Current Mode Control: Provides precise control of the output voltage and current by utilizing a current mode control scheme.
  2. Integrated Protection Functions: Includes overvoltage protection, undervoltage lockout, and thermal shutdown to ensure safe operation and protect the circuit from damage.
  3. Soft-Start Function: Allows gradual ramp-up of the output voltage during start-up, reducing stress on the components.
  4. High-Side and Low-Side Gate Drivers: Enables efficient switching of the power MOSFETs in the flyback converter topology.
  5. External Clock Input: Offers flexibility by allowing an external clock signal to be used instead of the internal oscillator.

Advantages and Disadvantages

Advantages: - Precise control of output voltage and current - Integrated protection functions for enhanced safety - Soft-start function reduces stress on components - Efficient high-side and low-side gate drivers - Flexibility with external clock input option

Disadvantages: - Limited operating temperature range (-40°C to +125°C) - Requires additional external components for complete power management solution

Working Principles

The UCC28221PWRG4 operates based on the current mode control principle. It regulates the output voltage and current by continuously monitoring the current flowing through the power MOSFET. By adjusting the duty cycle of the PWM signal, it maintains the desired output voltage and responds to load variations.

The IC incorporates various protection functions such as overvoltage protection, undervoltage lockout, and thermal shutdown. These features ensure the safety of the circuit and protect it from abnormal operating conditions.

Detailed Application Field Plans

The UCC28221PWRG4 is commonly used in power management applications, including but not limited to:

  1. AC-DC Power Supplies: It can be employed in offline flyback converters used in AC-DC power supplies for various electronic devices.
  2. LED Lighting: The IC's precise control capabilities make it suitable for driving LEDs in lighting applications, ensuring stable and efficient operation.
  3. Industrial Automation: It can be utilized in industrial automation systems that require reliable power management solutions.
  4. Consumer Electronics: The UCC28221PWRG4 finds application in consumer electronics such as televisions, audio systems, and gaming consoles.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the UCC28221PWRG4 include:

  1. UCC28950: A high-performance current mode PWM controller designed for offline flyback converters. It features integrated protection

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de UCC28221PWRG4 en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of UCC28221PWRG4 in technical solutions:

  1. Q: What is UCC28221PWRG4? A: UCC28221PWRG4 is a high-performance current-mode PWM controller designed for offline and DC-to-DC converter applications.

  2. Q: What are the key features of UCC28221PWRG4? A: Some key features include wide input voltage range, adjustable switching frequency, cycle-by-cycle current limit, and integrated soft-start.

  3. Q: What are the typical applications of UCC28221PWRG4? A: UCC28221PWRG4 is commonly used in power supplies, LED lighting, battery chargers, and other applications requiring efficient power conversion.

  4. Q: How does UCC28221PWRG4 help improve power efficiency? A: UCC28221PWRG4 incorporates advanced control techniques like valley switching and frequency foldback to optimize power efficiency at different load conditions.

  5. Q: Can UCC28221PWRG4 operate with both AC and DC inputs? A: Yes, UCC28221PWRG4 can operate with both AC and DC inputs, making it suitable for a wide range of applications.

  6. Q: Does UCC28221PWRG4 have built-in protection features? A: Yes, UCC28221PWRG4 includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  7. Q: How can I adjust the switching frequency of UCC28221PWRG4? A: The switching frequency of UCC28221PWRG4 can be adjusted by changing the value of an external resistor connected to the RT pin.

  8. Q: Can UCC28221PWRG4 support synchronous rectification? A: Yes, UCC28221PWRG4 supports synchronous rectification, which further improves power efficiency in certain applications.

  9. Q: What is the maximum operating temperature range of UCC28221PWRG4? A: The maximum operating temperature range of UCC28221PWRG4 is typically -40°C to 125°C.

  10. Q: Is UCC28221PWRG4 available in different package options? A: Yes, UCC28221PWRG4 is available in various package options, including the standard TSSOP-14 package.

Please note that these answers are general and may vary depending on the specific datasheet and application requirements.