UCC2808APWTR-1

Product Overview

Category

UCC2808APWTR-1 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

• High efficiency: UCC2808APWTR-1 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.
• Low standby power consumption: The device consumes minimal power during standby mode, enhancing energy efficiency.
• Protection features: UCC2808APWTR-1 incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown.

Package

UCC2808APWTR-1 is available in a small-sized surface-mount package known as TSSOP-8 (Thin Shrink Small Outline Package). This package ensures easy integration onto circuit boards and efficient heat dissipation.

Essence

The essence of UCC2808APWTR-1 lies in its ability to regulate and control power supply systems efficiently. It provides stable output voltages and currents while minimizing energy losses.

Packaging/Quantity

UCC2808APWTR-1 is typically packaged in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 6V
• Maximum Output Current: 500mA
• Switching Frequency: Up to 1MHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

UCC2808APWTR-1 has eight pins arranged as follows:

1. VREF: Reference voltage input pin.
2. COMP: Compensation pin for feedback control loop.
3. FB: Feedback pin for output voltage regulation.
4. CS: Current sense pin for current monitoring.
5. GND: Ground reference pin.
6. RT/CT: Timing resistor/capacitor connection pin.
7. OUT: Output pin for regulated voltage.
8. VIN: Input voltage supply pin.

Functional Features

• Voltage Regulation: UCC2808APWTR-1 ensures precise voltage regulation by adjusting the duty cycle of the switching signal.
• Current Limiting: The device incorporates a current sense mechanism to limit the output current and protect the system from overload conditions.
• Soft Start: It includes a soft start feature to gradually ramp up the output voltage, reducing inrush currents during startup.
• Frequency Control: UCC2808APWTR-1 allows adjustable switching frequency to optimize efficiency and minimize electromagnetic interference (EMI).
• Protection Mechanisms: The IC offers various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown to safeguard the power supply system.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced energy losses.
• Wide input voltage range enables versatile applications.
• Small package size facilitates easy integration onto circuit boards.
• Low standby power consumption enhances energy efficiency.
• Incorporation of protection mechanisms ensures system safety.

Disadvantages

• Limited maximum output current may restrict certain high-power applications.
• Requires external components for proper operation, increasing overall system complexity.

Working Principles

UCC2808APWTR-1 operates based on the principle of pulse width modulation (PWM). It generates a square wave switching signal with a variable duty cycle to regulate the output voltage. By adjusting the duty cycle, the IC controls the amount of time the power switch is on, thereby regulating the average output voltage.

The feedback mechanism continuously compares the actual output voltage with the desired reference voltage, adjusting the duty cycle accordingly to maintain stable output voltage regulation. The current sense mechanism monitors the output current and limits it within a safe range.

Detailed Application Field Plans

UCC2808APWTR-1 finds applications in various power supply systems, including: 1. Switch-mode power supplies (SMPS) for computers, televisions, and industrial equipment. 2. Battery chargers for portable devices such as smartphones and tablets. 3. LED drivers for lighting applications, both residential and commercial.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to UCC2808APWTR-1 include: - LM2576-ADJ - LT1370 - TPS5430

These alternatives can be considered based on specific requirements and design constraints.

In conclusion, UCC2808APWTR-1 is an integrated circuit designed for efficient power management applications. Its high efficiency, wide input voltage range, and protection features make it suitable for various power supply systems. However, its limited maximum output current and external component requirements should be