Texas Instruments
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UCC38051DRG4
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UCC38051DRG4

Product Overview

Category

UCC38051DRG4 belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This product is commonly used in various power supply systems, including switch-mode power supplies (SMPS), battery chargers, and LED drivers.

Characteristics

  • UCC38051DRG4 is a high-performance current mode PWM controller.
  • It operates with a wide input voltage range, making it suitable for different power supply designs.
  • The device offers precise control over output voltage and current, ensuring stable and efficient power delivery.
  • It incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown, enhancing system reliability.

Package

UCC38051DRG4 is available in a small outline package (SOP) with eight pins. This package provides ease of integration into circuit boards and facilitates heat dissipation.

Essence

The essence of UCC38051DRG4 lies in its ability to regulate and control power supply systems efficiently, ensuring reliable and stable operation.

Packaging/Quantity

UCC38051DRG4 is typically sold in reels or tubes, containing a specified quantity of units per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

  • Input Voltage Range: 9V to 20V
  • Output Voltage Range: 0V to 15V
  • Maximum Output Current: 2A
  • Operating Temperature Range: -40°C to 85°C
  • Switching Frequency: 100kHz to 1MHz
  • Error Amplifier Bandwidth: 10kHz
  • Oscillator Frequency Range: 50kHz to 500kHz

Detailed Pin Configuration

  1. COMP: Compensation pin for error amplifier feedback.
  2. CS: Current sense input for current mode control.
  3. RT/CT: Timing components connection for setting oscillator frequency and soft-start time.
  4. GND: Ground reference pin.
  5. VREF: Reference voltage output for error amplifier.
  6. VCC: Power supply input for the IC.
  7. OUT: Output pin for driving external power MOSFET.
  8. FB: Feedback pin for regulating output voltage.

Functional Features

  • Current mode control for improved transient response and stability.
  • Adjustable switching frequency to optimize efficiency and minimize electromagnetic interference (EMI).
  • Soft-start function to prevent excessive inrush current during startup.
  • Error amplifier with high bandwidth for precise voltage regulation.
  • Protection features including overvoltage protection, undervoltage lockout, and thermal shutdown.

Advantages and Disadvantages

Advantages

  • High-performance PWM controller for efficient power management.
  • Wide input voltage range allows flexibility in power supply design.
  • Comprehensive protection features enhance system reliability.
  • Small package size facilitates integration into circuit boards.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Requires external components for proper operation and customization.

Working Principles

UCC38051DRG4 operates based on the current mode control technique. It compares the sensed current through the power MOSFET with a reference voltage to regulate the output voltage. By adjusting the duty cycle of the PWM signal, the device controls the power delivered to the load. The error amplifier continuously monitors the output voltage and adjusts the duty cycle accordingly to maintain stable voltage regulation.

Detailed Application Field Plans

UCC38051DRG4 finds application in various power supply systems, including: 1. Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial machinery. 2. Battery chargers for portable devices, electric vehicles, and renewable energy systems. 3. LED drivers for lighting applications, such as streetlights, automotive lighting, and display panels.

Detailed and Complete Alternative Models

  1. UCC38050DRG4: Similar to UCC38051DRG4 but with a different pin configuration.
  2. UCC38052DRG4: Higher maximum output current compared to UCC38051DRG4.
  3. UCC38053DRG4: Enhanced protection features and wider input voltage range.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de UCC38051DRG4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of UCC38051DRG4 in technical solutions:

  1. Q: What is UCC38051DRG4? A: UCC38051DRG4 is a high-performance current mode PWM controller used in various power supply applications.

  2. Q: What are the key features of UCC38051DRG4? A: Some key features include adjustable frequency operation, soft-start capability, cycle-by-cycle current limiting, and integrated high-voltage startup.

  3. Q: What is the typical input voltage range for UCC38051DRG4? A: The typical input voltage range is between 8V and 18V.

  4. Q: Can UCC38051DRG4 be used in offline power supplies? A: Yes, UCC38051DRG4 can be used in offline power supplies as it has an integrated high-voltage startup circuit.

  5. Q: How does UCC38051DRG4 provide protection against overcurrent conditions? A: UCC38051DRG4 provides cycle-by-cycle current limiting, which helps protect against overcurrent conditions.

  6. Q: Is UCC38051DRG4 suitable for flyback converter applications? A: Yes, UCC38051DRG4 is suitable for flyback converter applications due to its adjustable frequency operation and soft-start capability.

  7. Q: What is the maximum duty cycle supported by UCC38051DRG4? A: The maximum duty cycle supported by UCC38051DRG4 is typically around 90%.

  8. Q: Can UCC38051DRG4 operate in continuous conduction mode (CCM)? A: Yes, UCC38051DRG4 can operate in continuous conduction mode, making it suitable for applications with higher power requirements.

  9. Q: Does UCC38051DRG4 have built-in protection against overvoltage conditions? A: No, UCC38051DRG4 does not have built-in overvoltage protection. External circuitry may be required for overvoltage protection.

  10. Q: What is the recommended operating temperature range for UCC38051DRG4? A: The recommended operating temperature range for UCC38051DRG4 is typically between -40°C and 125°C.

Please note that these answers are general and may vary depending on the specific application and design considerations. It's always recommended to refer to the datasheet and consult with technical experts for accurate information.