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UCC3819N
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UCC3819N - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode controller - Designed for use in switch-mode power supplies - Provides precise regulation of output voltage - Offers protection features for safe operation

Package: DIP-16 (Dual In-line Package with 16 pins)

Essence: The UCC3819N is a voltage mode PWM controller that is widely used in switch-mode power supplies. It ensures accurate regulation of the output voltage and incorporates various protection features to ensure safe operation.

Packaging/Quantity: The UCC3819N is typically sold in reels or tubes, containing 50 units per reel/tube.

Specifications

  • Input Voltage Range: 10V to 30V
  • Output Voltage Range: 0V to 5V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Duty Cycle: 100%
  • Oscillator Frequency Range: 50kHz to 1MHz
  • Output Current: 200mA

Detailed Pin Configuration

The UCC3819N has a total of 16 pins, which are assigned specific functions:

  1. COMP: Compensation pin for external compensation network.
  2. FB: Feedback pin for regulating the output voltage.
  3. RT/CT: Timing resistor/capacitor connection pin for setting oscillator frequency.
  4. VREF: Reference voltage output pin.
  5. GND: Ground reference pin.
  6. CS: Current sense input pin.
  7. SS/TR: Soft-start/Shutdown control pin.
  8. VCC: Power supply voltage input pin.
  9. NC: No connection pin.
  10. NC: No connection pin.
  11. NC: No connection pin.
  12. NC: No connection pin.
  13. NC: No connection pin.
  14. NC: No connection pin.
  15. NC: No connection pin.
  16. NC: No connection pin.

Functional Features

  • Voltage mode control for precise regulation of output voltage.
  • Adjustable oscillator frequency for flexibility in design.
  • Soft-start and shutdown control for smooth power-up and power-down sequences.
  • Overcurrent protection to prevent damage to the circuit.
  • Undervoltage lockout (UVLO) for reliable operation under low voltage conditions.
  • Error amplifier with external compensation for improved stability.

Advantages and Disadvantages

Advantages: - High-performance controller for switch-mode power supplies. - Accurate regulation of output voltage. - Incorporates various protection features for safe operation. - Flexible design options with adjustable oscillator frequency. - Smooth power-up and power-down sequences with soft-start and shutdown control.

Disadvantages: - Limited output current capability (200mA). - Requires external compensation network for optimal performance.

Working Principles

The UCC3819N operates on the principle of voltage mode control, where the output voltage is regulated by comparing it with a reference voltage. The error amplifier amplifies the difference between the output voltage and the reference voltage, which is then used to adjust the duty cycle of the PWM signal. This duty cycle controls the switching of the power MOSFETs in the power supply, thereby regulating the output voltage.

Detailed Application Field Plans

The UCC3819N is commonly used in various applications, including: 1. Switch-mode power supplies for computers and telecommunication equipment. 2. Industrial power systems and motor drives. 3. LED lighting applications. 4. Battery charging circuits. 5. Automotive electronics.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the UCC3819N are: 1. UC3842: Voltage mode PWM controller with similar features and package. 2. TL494: PWM controller with adjustable oscillator frequency and protection features. 3. SG3525: PWM controller with high output current capability and wide input voltage range.

These alternative models offer similar functionality and can be used as replacements depending on specific design requirements.

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Listen Sie 10 häufige Fragen und Antworten im Zusammenhang mit der Anwendung von UCC3819N in technischen Lösungen auf

Sure! Here are 10 common questions and answers related to the application of UCC3819N in technical solutions:

  1. Q: What is UCC3819N? A: UCC3819N is a voltage mode PWM controller IC used for regulating power supplies.

  2. Q: What are the key features of UCC3819N? A: Some key features include adjustable frequency, soft-start capability, current limiting, and overvoltage protection.

  3. Q: How does UCC3819N help in power supply regulation? A: UCC3819N provides control signals to regulate the output voltage of a power supply by adjusting the duty cycle of the PWM signal.

  4. Q: Can UCC3819N be used in both buck and boost converters? A: Yes, UCC3819N can be used in both buck and boost converter topologies.

  5. Q: What is the maximum operating frequency of UCC3819N? A: The maximum operating frequency of UCC3819N is typically around 1 MHz.

  6. Q: Does UCC3819N have built-in protection features? A: Yes, UCC3819N has built-in protection features such as overcurrent protection and overvoltage protection.

  7. Q: Can UCC3819N operate with wide input voltage ranges? A: Yes, UCC3819N can operate with wide input voltage ranges, typically from 4.5V to 16V.

  8. Q: Is UCC3819N suitable for high-power applications? A: Yes, UCC3819N is suitable for high-power applications as it can handle high currents and voltages.

  9. Q: Can UCC3819N be used in battery-powered applications? A: Yes, UCC3819N can be used in battery-powered applications as it has low quiescent current and supports low voltage operation.

  10. Q: Are there any application notes or reference designs available for UCC3819N? A: Yes, Texas Instruments provides application notes and reference designs that can help in implementing UCC3819N in various technical solutions.

Please note that the answers provided here are general and may vary depending on specific design requirements and datasheet specifications.