UCC3809PW-1

Product Overview

Category

UCC3809PW-1 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

• Integrated circuit
• Power management functionality
• High efficiency
• Compact size

Package

UCC3809PW-1 is available in a standard 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of UCC3809PW-1 lies in its ability to efficiently manage power in various electronic devices.

Packaging/Quantity

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

Specifications

• Input Voltage Range: 2.7V to 18V
• Output Voltage Range: 0.8V to 16V
• Output Current: Up to 500mA
• Operating Temperature Range: -40°C to +125°C
• Switching Frequency: Adjustable up to 1MHz
• Control Method: Current Mode PWM (Pulse Width Modulation)
• Protection Features: Overcurrent protection, thermal shutdown, undervoltage lockout

Detailed Pin Configuration

1. VREF: Reference voltage input
2. COMP: Error amplifier output
3. FB: Feedback pin for regulating output voltage
4. GND: Ground reference
5. RT/CT: Timing resistor/capacitor connection for setting switching frequency
6. CS: Current sense input for current mode control
7. SS/TR: Soft-start and shutdown control pin
8. VCC: Supply voltage input

Functional Features

• Current mode control for improved stability and transient response
• Adjustable switching frequency for optimization in different applications
• Soft-start function for controlled startup and reduced inrush current
• Shutdown capability for power-saving mode
• Error amplifier for precise voltage regulation
• Overcurrent protection and thermal shutdown for enhanced safety

Advantages and Disadvantages

Advantages

• High efficiency power management
• Compact size for space-constrained applications
• Wide input voltage range for versatility
• Protection features ensure safe operation

Disadvantages

• Limited output current capacity (up to 500mA)
• Requires external timing resistor/capacitor for setting switching frequency

Working Principles

UCC3809PW-1 operates on the principle of current mode control. It regulates the output voltage by comparing it with a reference voltage (VREF) and adjusting the duty cycle of the PWM signal accordingly. This control method provides improved stability and transient response compared to voltage mode control.

The switching frequency can be adjusted using an external timing resistor and capacitor connected to the RT/CT pin. This allows optimization for different applications, balancing efficiency and component size.

The soft-start function gradually ramps up the output voltage during startup, reducing inrush current and preventing excessive stress on components. The shutdown control pin (SS/TR) enables the device to enter a low-power state when not in use, further conserving energy.

Detailed Application Field Plans

UCC3809PW-1 finds application in various power management scenarios, including but not limited to: - Switching power supplies - Battery chargers - LED drivers - Industrial automation systems - Telecommunications equipment - Consumer electronics

Detailed and Complete Alternative Models

• UCC3809PW: Similar to UCC3809PW-1, but without the soft-start and shutdown control functionality.
• UCC3809PW-2: Enhanced version with higher output current capability (up to 1A).
• UCC3809PW-3: Low-power variant optimized for battery-powered applications.

These alternative models offer flexibility to suit specific requirements while maintaining the core functionality of UCC3809PW-1.

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