UCC2889DTR - English Editing Encyclopedia Entry

Product Overview

Category

UCC2889DTR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

• UCC2889DTR is a high-performance voltage mode PWM controller.
• It operates at a wide input voltage range, making it suitable for various power supply designs.
• The device offers excellent line and load regulation, ensuring stable output voltages.
• It incorporates various protection features such as overvoltage, undervoltage, and overcurrent protection.
• UCC2889DTR is designed to provide efficient power conversion with minimal power loss.

Package

The UCC2889DTR comes in a small outline package (SOP) with 8 pins.

Essence

The essence of UCC2889DTR lies in its ability to regulate and control power supply voltages efficiently.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 75V
• Output Voltage Range: 0.8V to 60V
• Operating Temperature Range: -40°C to 125°C
• Switching Frequency: Adjustable up to 1MHz
• Maximum Duty Cycle: 90%
• Quiescent Current: 2mA

Detailed Pin Configuration

1. VCC: Power supply input pin.
2. GND: Ground reference pin.
3. COMP: Compensation pin for loop stability.
4. FB: Feedback pin for regulating the output voltage.
5. CS: Current sense pin for monitoring the output current.
6. RT/CT: Timing components connection pin.
7. SS/TR: Soft-start and tracking pin.
8. OUT: Output pin for the regulated voltage.

Functional Features

• Voltage mode control with adjustable switching frequency.
• Soft-start function for controlled startup and reduced inrush current.
• Overvoltage protection to safeguard against excessive output voltage.
• Undervoltage lockout to prevent operation at low input voltages.
• Overcurrent protection for safe operation under load faults.
• Error amplifier with high gain for precise voltage regulation.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile power supply designs.
• Excellent line and load regulation ensure stable output voltages.
• Efficient power conversion minimizes power loss.
• Comprehensive protection features enhance system reliability.
• Compact SOP package enables space-saving PCB layouts.

Disadvantages

• Limited maximum duty cycle may restrict certain applications requiring higher duty cycles.
• The device's operating temperature range might not be suitable for extreme environments.

Working Principles

UCC2889DTR operates based on the voltage mode control technique. It compares the feedback voltage (FB) with a reference voltage to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal, which controls the power switch. By regulating the duty cycle, the output voltage is maintained within the desired range.

Detailed Application Field Plans

UCC2889DTR finds application in various power management systems, including but not limited to: - Switching power supplies - DC-DC converters - LED drivers - Battery chargers - Industrial automation equipment - Telecommunications devices

Detailed and Complete Alternative Models

1. UCC28910: Similar voltage mode PWM controller with extended input voltage range.
2. UCC28070: Advanced PWM controller with integrated power factor correction (PFC) functionality.
3. UCC3809: Low-power voltage mode PWM controller suitable for battery-powered applications.
4. UCC3895: High-performance PWM controller with advanced protection features and adjustable frequency.

These alternative models offer similar functionality to UCC2889DTR and can be considered based on specific application requirements.

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