UCC28050DR

Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode controller - Designed for offline and DC-to-DC power supplies - Provides precise regulation of output voltage - Offers protection features such as overvoltage and overcurrent protection - Enables efficient power conversion

Package: SOIC-8

Essence: The UCC28050DR is a voltage mode PWM controller that is widely used in various power supply applications. It offers high performance, precise regulation, and protection features to ensure reliable and efficient power conversion.

Packaging/Quantity: The UCC28050DR is available in a standard SOIC-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 9V to 20V
• Output Voltage Range: 0V to 15V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to 125°C
• Switching Frequency: 100kHz to 1MHz
• Control Method: Voltage Mode PWM
• Protection Features: Overvoltage, Overcurrent, Undervoltage Lockout

Pin Configuration

The UCC28050DR has the following pin configuration:

```

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| | --| VCC GND |-- Pin 1: Ground (GND) --| FB COMP |-- Pin 2: Feedback Input (FB) --| CS SS |-- Pin 3: Current Sense Input (CS) --| RT DTC |-- Pin 4: Oscillator Timing Resistor (RT) / Dead Time Control (DTC) --| OUT SYNC |-- Pin 5: Output (OUT) / Synchronization Input (SYNC) --| VREF VDD |-- Pin 6: Reference Voltage (VREF) / Power Supply (VDD) --| UVLO |-- Pin 7: Undervoltage Lockout (UVLO) --| INV |-- Pin 8: Inverting Input (INV) |___________| ```

Functional Features

• Voltage Mode Control: The UCC28050DR utilizes voltage mode control to regulate the output voltage of power supplies. This control method provides precise regulation and stability.

• Protection Features: The controller incorporates protection features such as overvoltage and overcurrent protection. These features help safeguard the power supply and connected devices from potential damage.

• Efficient Power Conversion: With its high-performance design, the UCC28050DR enables efficient power conversion by minimizing losses and maximizing energy transfer.

Advantages and Disadvantages

Advantages: - Precise regulation of output voltage - Protection features enhance system reliability - High-performance design for efficient power conversion - Compact SOIC-8 package for space-constrained applications

Disadvantages: - Limited maximum output current (1A) - Requires external components for complete power supply implementation

Working Principles

The UCC28050DR operates based on the voltage mode control principle. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified and used to control the duty cycle of the PWM signal, which regulates the output voltage. By continuously adjusting the duty cycle, the controller maintains the desired output voltage despite load variations.

Detailed Application Field Plans

The UCC28050DR finds extensive application in various power supply designs, including: - Offline AC-DC converters - DC-DC converters - LED drivers - Battery chargers - Industrial power supplies

Its versatility and performance make it suitable for both low-power and high-power applications.

Detailed and Complete Alternative Models

• UCC28051DR: Similar to UCC28050DR with additional features such as frequency synchronization and adjustable soft-start.
• UCC28052DR: Enhanced version of UCC28050DR with improved efficiency and higher output current capability.
• UCC28053DR: Advanced voltage mode controller with integrated protection features and enhanced noise immunity.

These alternative models offer different features and capabilities, allowing designers to choose the most suitable option for their specific application requirements.

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