UCC28019AP

Overview

Product Category

UCC28019AP belongs to the category of integrated circuits (ICs) used in power management applications.

Use

This IC is specifically designed for controlling power factor correction (PFC) circuits in switch-mode power supplies (SMPS).

Characteristics

• UCC28019AP is a highly efficient and reliable PFC controller.
• It operates at high frequencies, enabling compact and lightweight power supply designs.
• The IC incorporates advanced features such as cycle-by-cycle current limiting and soft-start functionality.
• It offers excellent line and load regulation, ensuring stable output voltage under varying conditions.

Package

UCC28019AP is available in a standard 8-pin dual in-line package (DIP), which facilitates easy integration into circuit boards.

Essence

The essence of UCC28019AP lies in its ability to regulate power factor correction efficiently, resulting in improved power quality and reduced energy consumption.

Packaging/Quantity

UCC28019AP is typically sold in reels containing 250 units per reel.

Specifications

• Input Voltage Range: 10V to 20V
• Operating Temperature Range: -40°C to 125°C
• Maximum Output Power: 300W
• Switching Frequency: 100kHz to 500kHz
• Supply Current: 3mA

Pin Configuration

UCC28019AP features the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. COMP: Compensation pin for feedback control loop
4. FB: Feedback pin for regulating output voltage
5. CS: Current sense input for cycle-by-cycle current limiting
6. RT/CT: Timing components connection for setting switching frequency
7. SS/UVLO: Soft-start and undervoltage lockout control pin
8. OUT: Output pin for driving external power MOSFET

Functional Features

1. Power Factor Correction: UCC28019AP ensures high power factor correction by regulating the input current waveform to match the input voltage waveform, resulting in reduced harmonic distortion and improved energy efficiency.
2. Cycle-by-Cycle Current Limiting: The IC monitors the current flowing through the power MOSFET and limits it on a cycle-by-cycle basis, preventing excessive current flow and protecting the circuit from damage.
3. Soft-Start Functionality: UCC28019AP incorporates a soft-start feature that gradually ramps up the output voltage during startup, reducing stress on components and minimizing inrush current.
4. Excellent Line and Load Regulation: The IC maintains stable output voltage even under varying line and load conditions, ensuring reliable operation of the power supply.

Advantages and Disadvantages

Advantages

• High power factor correction capability
• Compact and lightweight design
• Advanced protection features
• Excellent regulation performance

Disadvantages

• Limited maximum output power (300W)
• Requires additional external components for complete power supply implementation

Working Principles

UCC28019AP operates based on the principle of continuous conduction mode (CCM) power factor correction. It utilizes a control loop to regulate the input current waveform, aligning it with the input voltage waveform. This results in improved power factor and reduced harmonic distortion.

The IC continuously monitors the current flowing through the power MOSFET and adjusts the duty cycle of the switching signal to maintain a constant output voltage. It also incorporates soft-start functionality to prevent excessive inrush current during startup.

Application Field Plans

UCC28019AP finds extensive application in various power supply systems requiring power factor correction. Some of the detailed application field plans include:

1. Switch-mode power supplies for consumer electronics
2. LED lighting systems
3. Industrial motor drives
4. Renewable energy systems
5. Electric vehicle charging stations

Alternative Models

For those seeking alternative options, the following models can be considered:

1. UCC28019: Similar to UCC28019AP, but available in a different package (e.g., surface mount technology)
2. UCC28020: Higher power rating variant with increased maximum output power
3. UCC28021: Lower power rating variant suitable for lower wattage applications

These alternative models provide flexibility in choosing the most suitable IC based on specific requirements.

In conclusion, UCC28019AP is a highly efficient and reliable PFC controller used in switch-mode power supplies. Its advanced features, excellent regulation performance, and compact design make it an ideal choice for various power management applications.

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