Texas Instruments
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UCC3819ADR
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UCC3819ADR

Product Overview

Category

UCC3819ADR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

  • UCC3819ADR is a high-performance voltage mode PWM controller.
  • It operates with a wide input voltage range and provides precise regulation.
  • The device offers excellent line and load transient response.
  • It features adjustable frequency operation and programmable soft-start functionality.

Package

UCC3819ADR is available in an 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of UCC3819ADR lies in its ability to efficiently regulate power in various applications, ensuring stable and reliable performance.

Packaging/Quantity

UCC3819ADR is typically sold in reels containing 2500 units per reel.

Specifications

  • Input Voltage Range: 4.5V to 16V
  • Output Voltage Range: 0.8V to 6V
  • Adjustable Frequency Range: 100kHz to 1MHz
  • Operating Temperature Range: -40°C to 85°C
  • Maximum Duty Cycle: 90%
  • Quiescent Current: 2.5mA

Detailed Pin Configuration

  1. COMP: Compensation pin for external compensation network.
  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. VCC: Power supply input for the IC.
  6. RT/CT: Timing components connection for frequency adjustment.
  7. SS: Soft-start pin for controlling the startup behavior.
  8. OUT: Output pin for connecting to the power stage.

Functional Features

  • Voltage mode control for precise regulation.
  • Adjustable frequency operation for flexibility.
  • Programmable soft-start functionality for controlled startup.
  • Overcurrent protection for enhanced safety.
  • Under-voltage lockout (UVLO) for reliable operation.

Advantages and Disadvantages

Advantages

  • Wide input voltage range allows for versatile applications.
  • Excellent line and load transient response ensures stability.
  • Adjustable frequency operation provides flexibility in design.
  • Programmable soft-start functionality enables controlled startup.

Disadvantages

  • Limited maximum duty cycle may restrict certain applications.
  • Quiescent current of 2.5mA may not be suitable for ultra-low power designs.

Working Principles

UCC3819ADR operates based on the voltage mode control technique. It compares the feedback voltage with a reference voltage to generate an error signal, which is then amplified and used to adjust the duty cycle of the PWM (Pulse Width Modulation) signal. This regulated PWM signal controls the power stage to maintain the desired output voltage.

Detailed Application Field Plans

UCC3819ADR finds application in various power management scenarios, including but not limited to: - DC-DC converters - Switching power supplies - Battery chargers - LED drivers - Industrial automation systems

Detailed and Complete Alternative Models

  1. UCC3817ADR: Similar to UCC3819ADR, but with a different pin configuration.
  2. UCC3818ADR: Offers additional features such as overvoltage protection.
  3. UCC3819ADRG4: RoHS-compliant version of UCC3819ADR.

These alternative models provide similar functionality and can be considered as substitutes for UCC3819ADR depending on specific requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de UCC3819ADR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC3819ADR in technical solutions:

  1. Q: What is UCC3819ADR? A: UCC3819ADR is a voltage mode PWM controller used for regulating power supplies.

  2. Q: What are the key features of UCC3819ADR? A: Some key features include adjustable frequency, soft-start capability, overcurrent protection, and under-voltage lockout.

  3. Q: How does UCC3819ADR regulate power supplies? A: UCC3819ADR uses pulse width modulation (PWM) to control the duty cycle of the power supply, thereby regulating the output voltage.

  4. Q: Can UCC3819ADR be used in both buck and boost converters? A: Yes, UCC3819ADR can be used in both buck and boost converter topologies.

  5. Q: What is the maximum operating frequency of UCC3819ADR? A: The maximum operating frequency of UCC3819ADR is typically around 1 MHz.

  6. Q: Does UCC3819ADR have any built-in protection features? A: Yes, UCC3819ADR has built-in overcurrent protection and under-voltage lockout to ensure safe operation.

  7. Q: Can UCC3819ADR be used in high-power applications? A: Yes, UCC3819ADR can be used in high-power applications as long as it is paired with appropriate external components.

  8. Q: Is UCC3819ADR suitable for battery-powered applications? A: Yes, UCC3819ADR can be used in battery-powered applications as it has low quiescent current and supports low-voltage operation.

  9. Q: Are there any recommended reference designs or application notes available for UCC3819ADR? A: Yes, Texas Instruments provides reference designs and application notes that can help with the implementation of UCC3819ADR in various applications.

  10. Q: Where can I purchase UCC3819ADR? A: UCC3819ADR can be purchased from authorized distributors or directly from the manufacturer's website.