UCC2809PTR-2

Product Overview

Category

UCC2809PTR-2 belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for controlling and regulating power in various electronic devices and systems. It is commonly employed in applications such as power supplies, motor control, and lighting systems.

Characteristics

• UCC2809PTR-2 is a high-performance current-mode PWM controller.
• It operates with a wide input voltage range, making it suitable for diverse power supply designs.
• The device offers excellent line and load regulation, ensuring stable and reliable power delivery.
• It incorporates various protection features like overvoltage protection, undervoltage lockout, and thermal shutdown, enhancing system safety.
• UCC2809PTR-2 provides precise control over switching frequency and duty cycle, enabling efficient power conversion.

Package

UCC2809PTR-2 is available in a small outline package (SOP) with 8 pins. This package type ensures easy integration into circuit boards and facilitates efficient heat dissipation.

Essence

The essence of UCC2809PTR-2 lies in its ability to provide accurate and efficient power management, contributing to the overall performance and reliability of electronic systems.

Packaging/Quantity

UCC2809PTR-2 is typically packaged in reels or tubes, containing a specific quantity of units per package. The exact packaging and quantity may vary depending on the supplier or manufacturer.

Specifications

• Input Voltage Range: 4.5V to 16V
• Output Voltage Range: Adjustable
• Switching Frequency: Up to 1MHz
• Operating Temperature Range: -40°C to +125°C
• Maximum Duty Cycle: 100%
• Supply Current: 3mA (typical)
• Error Amplifier Bandwidth: 10kHz (typical)

Detailed Pin Configuration

UCC2809PTR-2 features the following pin configuration:

1. VREF: Reference voltage input for error amplifier.
2. COMP: Output of the error amplifier, used to control the PWM signal.
3. FB: Feedback pin for regulating the output voltage.
4. CS: Current sense input for current-mode control.
5. RT/CT: Timing resistor/capacitor connection for setting switching frequency and duty cycle.
6. GND: Ground reference for the IC.
7. VCC: Power supply input for the IC.
8. OUT: Output pin for driving external power devices.

Functional Features

• Current-mode control for improved stability and transient response.
• Adjustable switching frequency and duty cycle for flexible power management.
• Error amplifier with high bandwidth for precise regulation.
• Soft-start function to minimize inrush current during startup.
• Overvoltage protection and undervoltage lockout for enhanced system safety.
• Thermal shutdown feature to prevent overheating and damage.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile application scenarios.
• Excellent line and load regulation ensure stable power delivery.
• Comprehensive protection features enhance system reliability.
• Precise control over switching frequency and duty cycle enables efficient power conversion.
• Small package size facilitates easy integration into circuit designs.

Disadvantages

• Limited maximum duty cycle may restrict certain applications requiring continuous operation at high duty cycles.
• Higher cost compared to some alternative models with fewer features.

Working Principles

UCC2809PTR-2 operates based on the current-mode control principle. It compares the sensed current through the power devices with a reference voltage to generate a control signal. This control signal regulates the switching frequency and duty cycle of the power devices, ensuring accurate power delivery to the load. The error amplifier continuously adjusts the control signal based on the feedback voltage, maintaining the desired output voltage.

Detailed Application Field Plans

UCC2809PTR-2 finds application in various fields, including:

1. Power supply units for computers, servers, and telecommunications equipment.
2. Motor control systems in industrial automation and robotics.
3. LED lighting systems for residential, commercial, and automotive applications.
4. Battery charging circuits for portable devices and electric vehicles.
5. Solar power inverters for renewable energy systems.

Detailed and Complete Alternative Models

1. UCC2809PW: Similar to UCC2809PTR-2 but available in a wider package (TSSOP) with 8 pins.
2. UCC2809P-1: Variant with extended temperature range (-40°C to +150°C) suitable for harsh environments.
3. UCC2809P-3: Enhanced version with additional protection features like overcurrent detection and fault reporting.

These alternative models offer similar functionality to UCC2809PTR-2 while providing certain variations in package type, temperature range, or additional features.

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