UCC2804D/81221

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance PWM Controller
• Package: SOIC-8
• Essence: Regulating and controlling power in various applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 7V to 25V
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: Adjustable up to 1MHz
• Output Current: Up to 500mA
• Protection Features: Overvoltage, Undervoltage, Overcurrent, Overtemperature

Pin Configuration

The UCC2804D/81221 IC has the following pin configuration:

___________ | | NC |1 8| VCC NC |2 7| COMP GND|3 6| FB RT |4 5| CT |___________|

Functional Features

• High Performance: The UCC2804D/81221 is designed for high-performance power management applications.
• Wide Input Voltage Range: It can operate within a wide input voltage range of 7V to 25V, making it suitable for various power supply designs.
• Adjustable Switching Frequency: The switching frequency can be adjusted up to 1MHz, allowing flexibility in power regulation.
• Protection Features: The IC incorporates various protection features such as overvoltage, undervoltage, overcurrent, and overtemperature protection, ensuring safe operation.

Advantages and Disadvantages

Advantages: - High-performance power management - Wide input voltage range - Adjustable switching frequency - Integrated protection features

Disadvantages: - Limited output current capacity (up to 500mA)

Working Principles

The UCC2804D/81221 is a pulse-width modulation (PWM) controller IC. It regulates and controls the power flow in various applications by adjusting the duty cycle of the output waveform. By modulating the width of the pulses, it can regulate the average voltage or current delivered to the load.

The IC compares the feedback voltage (FB) with a reference voltage to determine the required duty cycle. It then generates a PWM signal that drives an external power switch, controlling the power flow accordingly.

Detailed Application Field Plans

The UCC2804D/81221 is widely used in power supply designs for various applications, including:

1. Switching Power Supplies: It can be utilized in AC-DC converters, DC-DC converters, and other switching power supply topologies.
2. LED Lighting: The IC can be employed in LED driver circuits, enabling efficient and dimmable LED lighting solutions.
3. Motor Control: It can be used in motor control applications, providing precise and adjustable speed control.
4. Battery Charging: The UCC2804D/81221 can be integrated into battery charging circuits, ensuring optimal charging efficiency and protection.

Detailed and Complete Alternative Models

1. UCC2804D/81222: Similar to UCC2804D/81221, but with extended temperature range (-40°C to 125°C).
2. UCC2804D/81223: Enhanced version with additional protection features and higher output current capacity.
3. UCC2804D/81224: Low-power variant suitable for battery-powered applications.

These alternative models offer similar functionality with slight variations in specifications to cater to different application requirements.

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