UCC2809D-2

Product Overview

Category

UCC2809D-2 belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

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

Characteristics

• High efficiency: UCC2809D-2 offers excellent power conversion efficiency, reducing energy losses.
• Wide input voltage range: It can handle a wide range of input voltages, making it suitable for different power supply applications.
• Fast response time: The IC provides quick response to changes in load conditions, ensuring stable power delivery.
• Protection features: UCC2809D-2 incorporates various protection mechanisms such as overvoltage, undervoltage, and overcurrent protection.

Package

UCC2809D-2 is available in a small outline integrated circuit (SOIC) package. This package type ensures easy integration into circuit boards and efficient heat dissipation.

Essence

The essence of UCC2809D-2 lies in its ability to regulate and control power supply systems efficiently, ensuring stable and reliable operation.

Packaging/Quantity

UCC2809D-2 is typically sold in reels containing a quantity of 250 units per reel.

Specifications

• Input Voltage Range: 8V to 18V
• Output Voltage Range: 0V to 15V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to 125°C
• Switching Frequency: 100kHz to 1MHz

Detailed Pin Configuration

UCC2809D-2 has a total of 8 pins, each serving a specific function:

1. VDD: Power supply input pin.
2. GND: Ground reference pin.
3. COMP: Compensation pin for feedback control loop.
4. FB: Feedback pin for voltage regulation.
5. CS: Current sense pin for current regulation.
6. RT/CT: Timing components connection pins.
7. OUT: Output pin for regulated power supply.
8. EN/UVLO: Enable and undervoltage lockout pin.

Functional Features

• Voltage Regulation: UCC2809D-2 ensures precise voltage regulation, maintaining a stable output voltage even under varying load conditions.
• Current Regulation: The IC provides accurate current regulation, preventing excessive current flow and protecting the system from damage.
• Soft Start: UCC2809D-2 incorporates a soft start feature, gradually ramping up the output voltage to prevent inrush currents during startup.
• Protection Mechanisms: The IC includes various protection features such as overvoltage, undervoltage, and overcurrent protection, safeguarding the power supply system.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced energy losses.
• Wide input voltage range allows for versatile applications.
• Fast response time ensures stable power delivery.
• Integrated protection mechanisms enhance system reliability.

Disadvantages

• Limited maximum output current of 1A may not be suitable for high-power applications.
• Requires external timing components for operation.

Working Principles

UCC2809D-2 operates based on the principle of pulse width modulation (PWM). It regulates the output voltage by adjusting the duty cycle of the switching signal. By comparing the feedback voltage with a reference voltage, the IC continuously adjusts the duty cycle to maintain the desired output voltage.

Detailed Application Field Plans

UCC2809D-2 finds application in various power management systems, including: - Switch-mode power supplies (SMPS) for computers, televisions, and industrial equipment. - Battery chargers for portable devices, electric vehicles, and renewable energy systems. - LED drivers for lighting applications, both residential and commercial.

Detailed and Complete Alternative Models

• UCC2809D-1: Similar to UCC2809D-2 but with a different maximum output current rating.
• UCC2809D-3: Another variant with additional features such as integrated overtemperature protection.

These alternative models provide flexibility in choosing the most suitable IC based on specific application requirements.

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