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UCC28C42DR
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UCC28C42DR

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High-performance current mode PWM controller - Designed for offline and DC-to-DC power supplies - Provides precise control of the output voltage and current

Package: SOIC-8

Essence: The UCC28C42DR is a high-performance current mode PWM controller used in power management applications. It offers precise control over the output voltage and current, making it suitable for various power supply designs.

Packaging/Quantity: The UCC28C42DR is available in a small outline integrated circuit (SOIC) package with 8 pins.

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%
  • Switching Frequency: 50kHz to 1MHz

Detailed Pin Configuration

The UCC28C42DR has the following pin configuration:

  1. COMP: Compensation pin for feedback control loop.
  2. CS: Current sense input pin for current mode control.
  3. VFB: Feedback voltage input pin.
  4. GND: Ground reference pin.
  5. RT/CT: Timing resistor/capacitor connection pin.
  6. VCC: Supply voltage input pin.
  7. OUT: Output voltage pin.
  8. SS/TR: Soft-start/tracking pin.

Functional Features

  • Current mode control for improved stability and transient response.
  • Adjustable switching frequency for optimization.
  • Soft-start function for controlled startup.
  • Overvoltage protection for enhanced safety.
  • Error amplifier for precise voltage regulation.

Advantages and Disadvantages

Advantages: - Precise control over output voltage and current. - High-performance current mode control for improved stability. - Adjustable switching frequency for optimization. - Soft-start function for controlled startup.

Disadvantages: - Limited input voltage range (10V to 30V). - Relatively low maximum duty cycle (100%). - Requires external components for complete power supply design.

Working Principles

The UCC28C42DR operates based on the current mode control principle. It compares the sensed current with a reference voltage and adjusts the duty cycle of the PWM signal accordingly. This control mechanism ensures precise regulation of the output voltage and current, even under varying load conditions.

Detailed Application Field Plans

The UCC28C42DR is commonly used in the following applications:

  1. Offline Power Supplies: The IC is suitable for designing offline power supplies used in various electronic devices, such as televisions, computers, and home appliances.
  2. DC-to-DC Converters: It can be utilized in DC-to-DC converter circuits to efficiently regulate voltage levels in different electronic systems.
  3. LED Lighting: The UCC28C42DR can be employed in LED lighting applications to provide stable and controlled power to the LEDs.

Detailed and Complete Alternative Models

  1. UCC28C42DG4: Similar to UCC28C42DR, but available in a different package (SOIC-14).
  2. UCC28070: A more advanced current mode PWM controller with additional features like integrated protection circuits and higher operating temperature range.
  3. UC3842: An older but widely used current mode PWM controller with similar functionality.

These alternative models offer similar functionalities and can be considered as substitutes for the UCC28C42DR depending on specific requirements and availability.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق UCC28C42DR في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of UCC28C42DR in technical solutions:

  1. Q: What is UCC28C42DR? A: UCC28C42DR is a high-performance current mode PWM controller used in power supply applications.

  2. Q: What is the operating voltage range of UCC28C42DR? A: The operating voltage range of UCC28C42DR is typically between 4.5V and 28V.

  3. Q: What is the maximum switching frequency supported by UCC28C42DR? A: UCC28C42DR supports a maximum switching frequency of up to 1MHz.

  4. Q: Can UCC28C42DR be used in both isolated and non-isolated power supply designs? A: Yes, UCC28C42DR can be used in both isolated and non-isolated power supply designs.

  5. Q: What are the key features of UCC28C42DR? A: Some key features of UCC28C42DR include cycle-by-cycle current limiting, soft-start capability, adjustable frequency, and programmable slope compensation.

  6. Q: How does UCC28C42DR provide cycle-by-cycle current limiting? A: UCC28C42DR uses a current sense resistor in series with the power MOSFET to monitor the current and provide cycle-by-cycle current limiting.

  7. Q: Can UCC28C42DR be used in flyback converter topologies? A: Yes, UCC28C42DR can be used in flyback converter topologies as it supports primary-side regulation.

  8. Q: Does UCC28C42DR have built-in protection features? A: Yes, UCC28C42DR has built-in protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.

  9. Q: What is the typical output voltage accuracy of UCC28C42DR? A: The typical output voltage accuracy of UCC28C42DR is around ±1%.

  10. Q: Can UCC28C42DR be used in automotive applications? A: Yes, UCC28C42DR can be used in automotive applications as it meets the necessary automotive standards and requirements.

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