UCC2809D-1

Product Overview

Category

UCC2809D-1 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications, specifically for controlling and regulating switch-mode power supplies.

Characteristics

• UCC2809D-1 is a high-performance current mode PWM controller.
• It operates at a fixed frequency and provides precise control over power supply output.
• The IC offers protection features such as overvoltage and overcurrent protection.
• It is designed to operate in a wide range of input voltages, making it suitable for various power supply designs.

Package

UCC2809D-1 is available in a small outline package (SOP) with 8 pins.

Essence

The essence of UCC2809D-1 lies in its ability to efficiently regulate and control power supply outputs, ensuring stable and reliable operation.

Packaging/Quantity

UCC2809D-1 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 16V
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: 100kHz to 1MHz
• Maximum Duty Cycle: 100%
• Supply Current: 2mA (typical)

Pin Configuration

UCC2809D-1 features the following pin configuration:

```

---

| | --| VREF GND|-- Pin 1: Reference Voltage Input --| COMP CS |-- Pin 2: Compensation Node / Current Sense Input --| FB RT |-- Pin 3: Feedback Node / Timing Resistor Connection --| VCC OUT |-- Pin 4: Power Supply Input / Output --| RT/CT EN |-- Pin 5: Timing Resistor or Capacitor Connection / Enable Input --| SS UVLO |-- Pin 6: Soft-Start / Undervoltage Lockout Input --| INV SYNC |-- Pin 7: Inverting Input / Synchronization Input --| NC VCC |-- Pin 8: Not Connected / Power Supply Input |___________| ```

Functional Features

• Current mode control for improved stability and transient response.
• Adjustable frequency and duty cycle for flexible power supply design.
• Overvoltage protection to safeguard the power supply and connected devices.
• Overcurrent protection to prevent damage due to excessive current flow.
• Soft-start feature for gradual power-up, reducing stress on components.

Advantages and Disadvantages

Advantages

• High-performance PWM controller for precise power supply regulation.
• Wide input voltage range allows for versatile application in different systems.
• Compact SOP package enables space-efficient PCB designs.
• Comprehensive protection features enhance system reliability.

Disadvantages

• Limited maximum duty cycle may restrict certain power supply designs.
• Requires external components for complete power supply implementation.
• May require additional circuitry for specific application requirements.

Working Principles

UCC2809D-1 operates based on the current mode control principle. It compares the sensed current with a reference voltage to generate a control signal that adjusts the duty cycle of the power switch. This control mechanism ensures stable and efficient power supply operation.

Detailed Application Field Plans

UCC2809D-1 finds extensive use in various power management applications, including: - Switch-mode power supplies for consumer electronics. - Industrial power supplies for automation and control systems. - LED lighting drivers for efficient illumination. - Battery charging circuits for portable devices. - Automotive power systems for electric vehicles.

Detailed and Complete Alternative Models

• UCC2809D: Similar to UCC2809D-1, but without the overvoltage protection feature.
• UCC2809D-2: Enhanced version with additional features like adjustable soft-start time and synchronization capability.
• UCC2809D-3: Higher voltage variant designed for power supply applications with input voltages up to 30V.

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

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