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UCC3819APWRG4
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UCC3819APWRG4

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Mode PWM Controller
  • Characteristics: High-performance, low-power, precision control
  • Package: TSSOP-14
  • Essence: Regulates and controls the output voltage of power supplies
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 3V to 40V
  • Output Voltage Range: 0.8V to 7.5V
  • Operating Temperature Range: -40°C to 125°C
  • Switching Frequency: Up to 1MHz
  • Duty Cycle Range: 0% to 100%
  • Error Amplifier Bandwidth: 10MHz
  • Soft Start Time: Adjustable
  • Current Limit Protection: Yes
  • Undervoltage Lockout: Yes
  • Power Good Output: Yes

Detailed Pin Configuration

The UCC3819APWRG4 has a total of 14 pins. The pin configuration is as follows:

  1. COMP: Compensation pin for error amplifier
  2. FB: Feedback pin for regulating the output voltage
  3. RT/CT: Timing resistor/capacitor connection for setting switching frequency and soft start time
  4. SS/TR: Soft start/tracking pin for controlling the startup behavior
  5. VREF: Reference voltage output pin
  6. GND: Ground reference pin
  7. VDD: Positive supply voltage input pin
  8. SYNC: Synchronization input pin for external clock
  9. EN: Enable pin for turning on/off the device
  10. ISENSE: Current sense input pin for current limit protection
  11. CS: Current sense resistor connection pin
  12. DRVH: High-side gate driver output pin
  13. DRVL: Low-side gate driver output pin
  14. PGND: Power ground reference pin

Functional Features

  • Voltage mode control for precise regulation of output voltage
  • Adjustable soft start time for controlled startup behavior
  • Current limit protection for overload conditions
  • Undervoltage lockout to prevent operation below specified voltage
  • Power good output for monitoring the output voltage status
  • Synchronization input for external clock synchronization
  • Enable pin for turning on/off the device

Advantages and Disadvantages

Advantages: - High-performance voltage regulation - Low-power consumption - Precision control over output voltage - Protection against overload conditions - Flexible startup behavior control

Disadvantages: - Limited input voltage range (3V to 40V) - Limited output voltage range (0.8V to 7.5V)

Working Principles

The UCC3819APWRG4 is a voltage mode PWM controller that regulates the output voltage of power supplies. It operates by comparing the feedback voltage from the FB pin with a reference voltage from the VREF pin. The error amplifier amplifies the difference between these voltages and generates an error signal. This error signal is then compared with a sawtooth waveform generated by the internal oscillator.

Based on this comparison, the controller adjusts the duty cycle of the output waveform to maintain the desired output voltage. The soft start feature allows for a gradual increase in the duty cycle during startup, preventing excessive current flow. The current limit protection ensures that the output current does not exceed a specified limit, protecting the power supply and connected devices.

Detailed Application Field Plans

The UCC3819APWRG4 is widely used in various applications, including:

  1. Switching power supplies
  2. DC-DC converters
  3. Battery chargers
  4. LED drivers
  5. Industrial automation systems
  6. Telecommunications equipment
  7. Automotive electronics
  8. Consumer electronics

Detailed and Complete Alternative Models

  1. UCC3819ADR: SOIC-14 package, similar specifications
  2. UCC3819AN: PDIP-14 package, similar specifications
  3. UCC3819APW: TSSOP-14 package, similar specifications
  4. UCC3819PW: TSSOP-14 package, similar specifications
  5. UCC3819D: SOIC-14 package, similar specifications

These alternative models provide similar functionality and can be used as replacements for the UCC3819APWRG4 in various applications.

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Énumérez 10 questions et réponses courantes liées à l'application de UCC3819APWRG4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC3819APWRG4 in technical solutions:

  1. Q: What is UCC3819APWRG4? A: UCC3819APWRG4 is a voltage mode PWM controller IC used for regulating power supplies.

  2. Q: What is the input voltage range of UCC3819APWRG4? A: The input voltage range of UCC3819APWRG4 is typically between 3V and 20V.

  3. Q: What is the output voltage range of UCC3819APWRG4? A: The output voltage range of UCC3819APWRG4 depends on the external components used, but it can be adjusted from a few volts up to several tens of volts.

  4. Q: What is the maximum switching frequency of UCC3819APWRG4? A: The maximum switching frequency of UCC3819APWRG4 is typically around 1MHz.

  5. Q: Can UCC3819APWRG4 be used in both buck and boost converter configurations? A: Yes, UCC3819APWRG4 can be used in both buck and boost converter configurations, as well as in other topologies like flyback or SEPIC.

  6. Q: Does UCC3819APWRG4 have built-in protection features? A: Yes, UCC3819APWRG4 has built-in protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.

  7. Q: What is the typical efficiency of a power supply using UCC3819APWRG4? A: The efficiency of a power supply using UCC3819APWRG4 depends on various factors like input/output voltage, load current, and external components used. It can typically range from 80% to 95%.

  8. Q: Can UCC3819APWRG4 be used in high-power applications? A: Yes, UCC3819APWRG4 can be used in high-power applications by selecting appropriate external components and ensuring proper thermal management.

  9. Q: Is UCC3819APWRG4 suitable for battery-powered applications? A: Yes, UCC3819APWRG4 is suitable for battery-powered applications as it has low quiescent current and supports pulse skipping mode for improved efficiency at light loads.

  10. Q: Are there any application notes or reference designs available for UCC3819APWRG4? A: Yes, Texas Instruments provides application notes and reference designs for UCC3819APWRG4, which can help in understanding its usage and optimizing the design for specific requirements.

Please note that the answers provided here are general and may vary depending on specific design considerations and requirements. It is always recommended to refer to the datasheet and relevant documentation for accurate information.