UCC2808DTR-1

Product Overview

Category

UCC2808DTR-1 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

• UCC2808DTR-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 incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• UCC2808DTR-1 provides precise control over switching frequency and duty cycle, enabling efficient power conversion.

Package

UCC2808DTR-1 is available in a small surface-mount package known as SOIC-8 (Small Outline Integrated Circuit). This package ensures easy integration onto circuit boards and efficient heat dissipation.

Essence

The essence of UCC2808DTR-1 lies in its ability to regulate and control power supply systems efficiently. By providing accurate voltage and current regulation, it enables reliable operation of electronic devices.

Packaging/Quantity

UCC2808DTR-1 is typically sold in reels containing 2500 units. However, it is also available in smaller quantities for prototyping purposes.

Specifications

• Input Voltage Range: 2.7V to 12V
• Output Voltage Range: 0V to VCC
• Maximum Duty Cycle: 100%
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency Range: 50kHz to 1MHz
• Error Amplifier Gain Bandwidth: 2.5MHz
• Oscillator Frequency Range: 100kHz to 500kHz

Detailed Pin Configuration

UCC2808DTR-1 features an 8-pin SOIC package with the following pin configuration:

1. COMP: Compensation pin for error amplifier feedback.
2. CS: Current sense input for current mode control.
3. GND: Ground reference for the IC.
4. FB: Feedback pin for output voltage regulation.
5. VREF: Reference voltage output for error amplifier.
6. VCC: Power supply input for the IC.
7. OUT: Output pin for driving external power devices.
8. RT/CT: Timing components connection for oscillator frequency and duty cycle control.

Functional Features

1. Voltage Mode Control: UCC2808DTR-1 utilizes voltage mode control to regulate the output voltage accurately.
2. Current Mode Control: The IC supports current mode control, enabling better stability and response in certain applications.
3. Protection Mechanisms: It incorporates various protection features like overvoltage protection, undervoltage lockout, and thermal shutdown to safeguard the power supply system.
4. Wide Input Voltage Range: UCC2808DTR-1 can operate with a wide range of input voltages, enhancing its versatility in different power supply designs.
5. Efficient Power Conversion: The device provides precise control over switching frequency and duty cycle, resulting in efficient power conversion and reduced energy losses.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows flexibility in power supply design.
• Excellent line and load regulation ensure stable output voltages.
• Protection features enhance the reliability and safety of the power supply system.
• Precise control over switching frequency and duty cycle enables efficient power conversion.

Disadvantages

• Limited availability in smaller quantities for prototyping purposes.
• Requires careful consideration of external components for optimal performance.

Working Principles

UCC2808DTR-1 operates based on the voltage mode control technique. 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 adjust the duty cycle of the PWM signal, which controls the power delivered to the load.

By continuously monitoring the output voltage and adjusting the duty cycle accordingly, UCC2808DTR-1 ensures stable and regulated output voltages. The device also incorporates various protection mechanisms to prevent damage to the power supply system under abnormal operating conditions.

Detailed Application Field Plans

UCC2808DTR-1 finds applications in various power supply systems, including: - Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial machinery. - Battery chargers for portable electronic devices, electric vehicles, and renewable energy systems. - LED drivers for lighting applications, such as streetlights, automotive lighting, and display backlighting.

The IC's wide input voltage range, precise regulation, and protection features make it suitable for diverse power supply requirements across different industries.

Detailed and Complete Alternative Models

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