UCC2808N-1G4

Product Overview

Category

UCC2808N-1G4 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

• UCC2808N-1G4 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 IC offers excellent line and load regulation, ensuring stable output voltages.
• It incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• UCC2808N-1G4 provides precise control over switching frequency and duty cycle, enabling efficient power conversion.

Package

The UCC2808N-1G4 IC is available in a small outline package (SOP) with 8 pins. This package ensures easy integration into circuit boards and facilitates heat dissipation.

Essence

The essence of UCC2808N-1G4 lies in its ability to regulate and control power supply systems efficiently, ensuring stable and reliable operation.

Packaging/Quantity

UCC2808N-1G4 is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 7V to 25V
• Output Voltage Range: Adjustable
• Maximum Duty Cycle: 100%
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency Range: 50kHz to 500kHz
• Error Amplifier Gain Bandwidth: 2MHz

Pin Configuration

UCC2808N-1G4 features the following pin configuration:

1. COMP: Compensation Pin
2. CS: Current Sense Pin
3. GND: Ground Pin
4. FB: Feedback Pin
5. VCC: Supply Voltage Pin
6. OUT: Output Pin
7. RT/CT: Timing Resistor/Capacitor Pin
8. SS/TR: Soft-Start/Shutdown Pin

Functional Features

1. Voltage Mode Control: UCC2808N-1G4 utilizes voltage mode control to regulate the output voltage accurately.
2. Current Sensing: The IC incorporates a current sense pin for precise current monitoring and protection against overcurrent conditions.
3. Soft-Start Function: The soft-start pin enables gradual power-up, reducing stress on components during startup.
4. Protection Mechanisms: UCC2808N-1G4 includes various protection features like overvoltage protection, undervoltage lockout, and thermal shutdown, ensuring system safety.
5. Wide Frequency Range: The IC allows flexible switching frequency selection within a wide range, enabling optimization for different applications.

Advantages and Disadvantages

Advantages

• High-performance voltage mode PWM controller
• Wide input voltage range
• Excellent line and load regulation
• Comprehensive protection features
• Precise control over switching frequency and duty cycle

Disadvantages

• Limited maximum duty cycle of 100%
• Requires external timing resistor and capacitor for operation

Working Principles

UCC2808N-1G4 operates based on the voltage mode control technique. It compares the feedback voltage with a reference voltage to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal driving the power switch. By regulating the duty cycle, the IC maintains the desired output voltage.

Detailed Application Field Plans

UCC2808N-1G4 finds applications in various power supply systems, including: - Switch-mode power supplies (SMPS) - Battery chargers - LED drivers - Industrial power systems - Telecom power supplies

Detailed and Complete Alternative Models

Some alternative models to UCC2808N-1G4 that offer similar functionality include: - UC3843: PWM controller with adjustable frequency and duty cycle control. - TL494: PWM controller with integrated error amplifier and multiple protection features. - SG3525: Voltage mode PWM controller with a wide input voltage range.

These alternative models can be considered based on specific application requirements and design constraints.

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