Texas Instruments
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UCC3804DTR
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UCC3804DTR

Product Overview

Category

UCC3804DTR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

  • UCC3804DTR is a high-performance current-mode PWM controller.
  • It operates at a fixed frequency and features low start-up current.
  • The device offers precise control of output voltage and current.
  • It provides protection against overvoltage, undervoltage, and overcurrent conditions.

Package

UCC3804DTR is available in a small outline package (SOT-23) which allows for easy integration into various electronic systems.

Essence

The essence of UCC3804DTR lies in its ability to regulate and control power delivery efficiently and reliably.

Packaging/Quantity

UCC3804DTR is typically packaged in reels containing 3000 units per reel.

Specifications

  • Input Voltage Range: 7V to 25V
  • Output Voltage Range: 0.8V to 5.5V
  • Operating Temperature Range: -40°C to 85°C
  • Maximum Duty Cycle: 100%
  • Oscillator Frequency: 50kHz to 1MHz
  • Quiescent Current: 2mA

Detailed Pin Configuration

UCC3804DTR features the following pin configuration:

  1. COMP: Compensation pin for external error amplifier.
  2. CS: Current sense input for current-mode control.
  3. GND: Ground reference for the IC.
  4. VREF: Reference voltage output.
  5. VCC: Power supply input.
  6. OUT: Output pin for driving external power MOSFET.
  7. RT/CT: Timing resistor/capacitor connection for setting oscillator frequency.
  8. SS/TR: Soft-start/undervoltage lockout pin.

Functional Features

  • Current-mode control for precise regulation of output voltage and current.
  • Fixed-frequency operation ensures stable performance.
  • Soft-start feature prevents excessive inrush current during startup.
  • Undervoltage lockout protects against low input voltage conditions.
  • Overvoltage protection safeguards the system from voltage spikes.
  • Overcurrent protection prevents damage due to excessive load currents.

Advantages and Disadvantages

Advantages

  • High-performance PWM controller for efficient power management.
  • Precise control of output voltage and current.
  • Protection features enhance system reliability.
  • Small package size allows for easy integration.

Disadvantages

  • Limited input voltage range (7V to 25V).
  • Requires external error amplifier for compensation.

Working Principles

UCC3804DTR operates on the principle of current-mode control. It compares the sensed current with a reference voltage to regulate the output voltage and current. The device generates a pulse-width modulated signal that drives an external power MOSFET, controlling the power delivered to the load. The fixed-frequency operation ensures stable performance, while the various protection features safeguard the system from potential faults.

Detailed Application Field Plans

UCC3804DTR finds applications in various fields, including: 1. Switching power supplies 2. DC-DC converters 3. Battery chargers 4. LED drivers 5. Motor control systems

Detailed and Complete Alternative Models

Some alternative models to UCC3804DTR include: 1. UC3844 2. TL494 3. SG3525 4. LT1241 5. MC34063

These models offer similar functionality and can be used as substitutes depending on specific requirements.

In conclusion, UCC3804DTR is a high-performance current-mode PWM controller used in power management applications. Its precise control, protection features, and small package size make it suitable for a wide range of applications.

Énumérez 10 questions et réponses courantes liées à l'application de UCC3804DTR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC3804DTR in technical solutions:

  1. Q: What is UCC3804DTR? A: UCC3804DTR is a high-performance current-mode PWM controller used in power supply applications.

  2. Q: What is the operating voltage range of UCC3804DTR? A: The operating voltage range of UCC3804DTR is typically between 8V and 18V.

  3. Q: What is the maximum switching frequency supported by UCC3804DTR? A: UCC3804DTR supports a maximum switching frequency of up to 1MHz.

  4. Q: Can UCC3804DTR be used in both isolated and non-isolated power supply designs? A: Yes, UCC3804DTR can be used in both isolated and non-isolated power supply designs.

  5. Q: Does UCC3804DTR have built-in protection features? A: Yes, UCC3804DTR has built-in protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  6. Q: What is the typical output current capability of UCC3804DTR? A: The typical output current capability of UCC3804DTR is around 500mA.

  7. Q: Can UCC3804DTR be used in flyback converter topologies? A: Yes, UCC3804DTR can be used in flyback converter topologies.

  8. Q: What type of feedback compensation does UCC3804DTR support? A: UCC3804DTR supports voltage mode control with external compensation.

  9. Q: Is UCC3804DTR suitable for low-power applications? A: Yes, UCC3804DTR is suitable for low-power applications as it has a low operating current and standby power consumption.

  10. Q: What are the typical applications of UCC3804DTR? A: Some typical applications of UCC3804DTR include offline power supplies, battery chargers, LED drivers, and industrial control systems.

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