UCC2809P-2

Product Overview

Category

UCC2809P-2 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

• UCC2809P-2 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 precise control over output voltage and current regulation.
• It incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• UCC2809P-2 provides excellent line and load regulation, ensuring stable and reliable power delivery.

Package and Quantity

The UCC2809P-2 is available in a standard 8-pin dual in-line package (DIP). It is typically sold in reels or tubes containing multiple units, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 7V to 25V
• Output Voltage Range: 0V to VCC - 2V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: Adjustable up to 500kHz

Pin Configuration

The UCC2809P-2 features the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VREF | Reference Voltage Output | | 2 | COMP | Error Amplifier Output | | 3 | FB | Feedback Input | | 4 | GND | Ground | | 5 | CS | Current Sense Input | | 6 | RT/CT | Timing Resistor/Capacitor | | 7 | VCC | Supply Voltage Input | | 8 | OUT | Output |

Functional Features

• UCC2809P-2 utilizes voltage mode control to regulate the output voltage.
• It employs an error amplifier to compare the feedback voltage with the reference voltage and adjust the duty cycle of the PWM signal accordingly.
• The device incorporates a current sense input for accurate current regulation.
• It offers adjustable switching frequency to optimize efficiency and performance.
• UCC2809P-2 includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile power supply designs.
• Precise control over output voltage and current regulation ensures stable operation.
• Excellent line and load regulation provide reliable power delivery.
• Integrated protection features enhance system safety and reliability.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• The DIP package may not be ideal for space-constrained designs.

Working Principles

UCC2809P-2 operates based on the voltage mode control technique. The error amplifier compares the feedback voltage from the output with the reference voltage and generates an error signal. This error signal is then used to adjust the duty cycle of the PWM signal, which controls the power switch. By regulating the duty cycle, the output voltage is maintained at the desired level.

Detailed Application Field Plans

UCC2809P-2 finds application in various power management systems, including: 1. Switch-mode power supplies (SMPS) for computers, televisions, and industrial equipment. 2. Battery chargers for portable devices, electric vehicles, and renewable energy systems. 3. LED drivers for lighting applications, both residential and commercial.

Detailed Alternative Models

1. UCC2809P-1: Similar to UCC2809P-2, but with a different voltage range.
2. UCC2809P-3: Enhanced version with additional features such as synchronization and frequency dithering.

In conclusion, UCC2809P-2 is a high-performance voltage mode PWM controller designed for power management applications. Its wide input voltage range, precise regulation, and integrated protection features make it suitable for various power supply designs. However, its limited maximum output current and DIP package may pose limitations in certain applications.