UCC3802NG4

Overview

Product Category

UCC3802NG4 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

• High efficiency: UCC3802NG4 offers excellent power conversion efficiency, minimizing energy losses during operation.
• Wide input voltage range: It can handle a wide range of input voltages, making it suitable for diverse applications.
• Protection features: The IC incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe and reliable operation.
• Low standby power consumption: UCC3802NG4 consumes minimal power in standby mode, contributing to energy savings.

Package and Quantity

UCC3802NG4 is available in a compact and industry-standard 8-pin SOIC (Small Outline Integrated Circuit) package. It is typically sold in reels containing a quantity of 2500 units.

Specifications

Electrical Characteristics

• Input Voltage Range: 10V to 30V
• Output Voltage Range: 0V to 15V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to 85°C
• Supply Voltage: 5V to 30V

Pin Configuration

The UCC3802NG4 IC has the following pin configuration:

1. VREF: Reference voltage output
2. COMP: Error amplifier output
3. CS: Current sense input
4. GND: Ground
5. RT/CT: Timing resistor/capacitor connection
6. OUT: Power switch output
7. UVLO: Undervoltage lockout input
8. VCC: Supply voltage input

Functional Features

1. Error Amplifier

The UCC3802NG4 incorporates a high-gain error amplifier that compares the feedback voltage with the reference voltage to regulate the output voltage accurately.

2. Current Sensing

The IC utilizes a current sense input to monitor the load current, enabling precise control and protection against overcurrent conditions.

3. Soft-Start Function

UCC3802NG4 includes a soft-start feature that gradually ramps up the output voltage during startup, preventing excessive inrush current and improving system reliability.

4. Protection Mechanisms

This IC integrates various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown. These safeguards ensure the safety and longevity of the power supply system.

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings.
• Wide input voltage range allows for versatile applications.
• Compact package size facilitates space-constrained designs.
• Comprehensive protection mechanisms enhance system reliability.

Disadvantages

• Limited maximum output current may restrict certain high-power applications.
• Requires external timing components for operation.

Working Principle

UCC3802NG4 operates based on the principle of pulse width modulation (PWM). It generates a series of pulses with varying widths to control the output voltage. By adjusting the duty cycle of these pulses, the IC regulates the average output voltage according to the desired level.

Application Field Plans

1. Switch-Mode Power Supplies (SMPS)

UCC3802NG4 is widely used in SMPS designs for various applications, including computer power supplies, industrial power systems, and telecommunications equipment.

2. Battery Chargers

The IC finds application in battery charging circuits, ensuring efficient and controlled charging of batteries in devices such as smartphones, laptops, and electric vehicles.

3. LED Drivers

UCC3802NG4 is employed in LED driver circuits, providing precise control over the current supplied to LEDs, enabling efficient and reliable lighting solutions.

Alternative Models

• UCC3802DG4
• UCC3802PWG4
• UCC3802N

These alternative models offer similar functionality and can be used as substitutes for UCC3802NG4 in various applications.

In conclusion, UCC3802NG4 is a versatile integrated circuit designed for power management applications. With its high efficiency, wide input voltage range, and comprehensive protection features, it finds extensive use in switch-mode power supplies, battery chargers, and LED drivers. While it has certain limitations, such as limited maximum output current, it remains a popular choice due to its reliability and energy-saving capabilities.