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UCC2819APWG4
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UCC2819APWG4

Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode controller - Designed for offline and DC-to-DC power supplies - Provides precise regulation of output voltage - Offers excellent line and load regulation - Enables efficient power conversion

Package: TSSOP-20

Essence: The UCC2819APWG4 is an integrated circuit that serves as a voltage mode PWM controller. It is widely used in various power supply applications to regulate the output voltage with high precision and efficiency.

Packaging/Quantity: The UCC2819APWG4 is available in a TSSOP-20 package. It is typically sold in reels or tubes containing multiple units.

Specifications

The UCC2819APWG4 has the following specifications:

  • Input Voltage Range: 8V to 18V
  • Output Voltage Range: 0V to 5V
  • Operating Temperature Range: -40°C to 85°C
  • Maximum Duty Cycle: 100%
  • Switching Frequency Range: 50kHz to 1MHz
  • Output Current: Up to 1A
  • Error Amplifier Bandwidth: 10MHz
  • Soft Start Time: Adjustable

Pin Configuration

The UCC2819APWG4 features a TSSOP-20 package with the following pin configuration:

  1. COMP: Compensation Pin
  2. FB: Feedback Pin
  3. VREF: Reference Voltage Pin
  4. CS: Current Sense Pin
  5. RT/CT: Timing Components Pin
  6. GND: Ground Pin
  7. VDD: Power Supply Pin
  8. SYNC: Synchronization Pin
  9. SS/TR: Soft Start/Shutdown Pin
  10. EN/UVLO: Enable/Undervoltage Lockout Pin
  11. VSENSE: Voltage Sense Pin
  12. ISENSE: Current Sense Pin
  13. AGND: Analog Ground Pin
  14. VCC: Power Supply Pin
  15. RT/CT: Timing Components Pin
  16. CS: Current Sense Pin
  17. FB: Feedback Pin
  18. COMP: Compensation Pin
  19. SS/TR: Soft Start/Shutdown Pin
  20. SYNC: Synchronization Pin

Functional Features

The UCC2819APWG4 offers the following functional features:

  • Voltage mode control for precise regulation of output voltage
  • Adjustable soft start time for controlled startup
  • High bandwidth error amplifier for improved stability
  • Enable pin for easy on/off control
  • Undervoltage lockout (UVLO) protection
  • Synchronization capability for multi-phase operation
  • Current sense and voltage sense pins for accurate feedback

Advantages and Disadvantages

Advantages: - Precise regulation of output voltage - Excellent line and load regulation - Efficient power conversion - Adjustable soft start time for controlled startup - Synchronization capability for multi-phase operation

Disadvantages: - Limited maximum output current (up to 1A) - Requires external timing components for operation

Working Principles

The UCC2819APWG4 operates based on the voltage mode control technique. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal, which controls the power switch in the power supply circuit. By continuously monitoring and adjusting the duty cycle, the UCC2819APWG4 ensures that the output voltage remains stable and regulated.

Detailed Application Field Plans

The UCC2819APWG4 is commonly used in various applications, including:

  1. Offline Power Supplies: The UCC2819APWG4 is suitable for offline power supplies used in appliances, lighting systems, and industrial equipment. It provides precise voltage regulation and efficient power conversion.

  2. DC-to-DC Converters: This IC is also utilized in DC-to-DC converters found in telecommunications, automotive, and renewable energy systems. It enables accurate voltage control and high-performance power conversion.

  3. Battery Chargers: The UCC2819APWG4 can be employed in battery chargers for portable devices, electric vehicles, and renewable energy storage systems. It ensures optimal charging efficiency and reliable voltage regulation.

Detailed and Complete Alternative Models

  1. UCC2819ADW: Similar to UCC2819APWG4 but available in a SOIC-20 package.
  2. UCC2819ADR: Similar to UCC2819APWG4 but available in a SOIC-20 package with a wider operating temperature range (-40°C to 125°C).
  3. UCC3819APWG4: Voltage mode PWM controller with enhanced features and higher output current capability (up to 3A).

These alternative models offer similar

Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням UCC2819APWG4 у технічних рішеннях

Sure! Here are 10 common questions and answers related to the application of UCC2819APWG4 in technical solutions:

  1. Q: What is UCC2819APWG4? A: UCC2819APWG4 is a pulse width modulation (PWM) controller IC used for controlling power supplies in various applications.

  2. Q: What are the key features of UCC2819APWG4? A: Some key features include adjustable frequency, soft-start capability, cycle-by-cycle current limiting, and overvoltage protection.

  3. Q: How does UCC2819APWG4 help in power supply designs? A: UCC2819APWG4 provides precise control over the switching frequency and duty cycle, ensuring efficient power conversion and regulation.

  4. Q: Can UCC2819APWG4 be used in both AC-DC and DC-DC power supply designs? A: Yes, UCC2819APWG4 can be used in both AC-DC and DC-DC power supply designs, making it versatile for various applications.

  5. Q: What is the maximum operating voltage range of UCC2819APWG4? A: The maximum operating voltage range of UCC2819APWG4 is typically between 7V and 30V.

  6. Q: Does UCC2819APWG4 have built-in protection features? A: Yes, UCC2819APWG4 has built-in protection features such as overvoltage protection, cycle-by-cycle current limiting, and thermal shutdown.

  7. Q: Can UCC2819APWG4 support high-frequency operation? A: Yes, UCC2819APWG4 can support high-frequency operation up to several hundred kilohertz, depending on the specific application requirements.

  8. Q: What is the purpose of the soft-start feature in UCC2819APWG4? A: The soft-start feature gradually ramps up the output voltage during startup, preventing excessive inrush current and improving system reliability.

  9. Q: Is UCC2819APWG4 suitable for low-power applications? A: Yes, UCC2819APWG4 is suitable for low-power applications as it can operate at low duty cycles and has a low quiescent current.

  10. Q: Are there any application notes or reference designs available for UCC2819APWG4? A: Yes, Texas Instruments provides application notes and reference designs that can help users understand and implement UCC2819APWG4 in their designs effectively.

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