UCC2808ADTR-1

Product Overview

Category

UCC2808ADTR-1 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

• UCC2808ADTR-1 is a high-performance voltage mode PWM controller.
• It operates with a wide input voltage range, making it suitable for different power supply designs.
• The device offers excellent line and load regulation, ensuring stable output voltages.
• It features a low start-up current, enabling efficient power management.
• UCC2808ADTR-1 incorporates protection features such as overvoltage and overcurrent protection, enhancing system reliability.

Package

The UCC2808ADTR-1 comes in a small surface-mount package known as SOIC-8 (Small Outline Integrated Circuit). This package provides ease of integration into various circuit boards.

Essence

The essence of UCC2808ADTR-1 lies in its ability to regulate and control power supply systems efficiently. It ensures stable output voltages while offering protection against potential faults.

Packaging/Quantity

UCC2808ADTR-1 is typically packaged in reels or tubes, containing a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 6V
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: Up to 500kHz
• Maximum Duty Cycle: 100%
• Start-Up Current: 25µA
• Quiescent Current: 2mA

Detailed Pin Configuration

UCC2808ADTR-1 features an 8-pin SOIC package with the following pin configuration:

1. COMP: Compensation Pin
2. CS: Current Sense Pin
3. GND: Ground Pin
4. VREF: Reference Voltage Pin
5. FB: Feedback Pin
6. RT/CT: Timing Components Pin
7. OUT: Output Pin
8. VCC: Supply Voltage Pin

Functional Features

• Voltage mode control for precise regulation of output voltage.
• Adjustable switching frequency to optimize efficiency and performance.
• Soft-start function to prevent inrush current during power-up.
• Overvoltage protection (OVP) to safeguard against excessive output voltage.
• Overcurrent protection (OCP) to protect the system from excessive load currents.
• Error amplifier for accurate feedback control.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows flexibility in power supply designs.
• Excellent line and load regulation ensure stable output voltages.
• Low start-up current enables efficient power management.
• Protection features enhance system reliability.
• Compact SOIC package facilitates easy integration into circuit boards.

Disadvantages

• Limited output voltage range may not be suitable for certain applications requiring higher voltages.
• The device's maximum duty cycle of 100% may limit its use in specific power supply designs.

Working Principles

UCC2808ADTR-1 operates based on the voltage mode control technique. It compares the feedback voltage (FB) with a reference voltage (VREF) to regulate the output voltage. By adjusting the duty cycle of the PWM signal, it controls the power switch to maintain the desired output voltage. The error amplifier ensures accurate feedback control, while the soft-start function prevents inrush current during power-up.

Detailed Application Field Plans

UCC2808ADTR-1 finds extensive application in various power supply systems, including: - Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial applications. - Battery chargers for portable devices, electric vehicles, and renewable energy systems. - LED drivers for lighting applications, such as streetlights, automotive lighting, and display backlighting.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to UCC2808ADTR-1 are: - LM5035: A voltage mode PWM controller with similar features and specifications. - UC3843: A versatile PWM controller suitable for a wide range of power supply applications. - LT1241: A high-performance PWM controller designed for high-frequency switching power supplies.

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

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