UCC3809P-2

Product Overview

Category

UCC3809P-2 belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply designs, including switch-mode power supplies (SMPS), battery chargers, and DC-DC converters.

Characteristics

• UCC3809P-2 is a high-performance, low-power current mode PWM controller.
• It operates over a wide input voltage range, making it suitable for different power supply applications.
• The IC incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• It offers adjustable frequency operation and precise duty cycle control.
• UCC3809P-2 provides excellent line and load regulation, ensuring stable and reliable power delivery.

Package

UCC3809P-2 is available in a small outline package (SOP) with 8 pins. This package type allows for easy integration into circuit boards and provides good thermal dissipation.

Essence

The essence of UCC3809P-2 lies in its ability to efficiently regulate and control power in various applications, ensuring stable and reliable operation.

Packaging/Quantity

UCC3809P-2 is typically packaged in reels or tubes, containing a quantity of 250 or 1000 units per package, respectively.

Specifications

• Input Voltage Range: 4.5V to 15V
• Output Voltage Range: Adjustable
• Maximum Duty Cycle: 100%
• Operating Temperature Range: -40°C to 85°C
• Oscillator Frequency Range: 50kHz to 1MHz
• Output Current: Up to 500mA

Detailed Pin Configuration

1. VREF: Reference voltage output
2. COMP: Error amplifier output
3. FB: Feedback pin for regulating output voltage
4. GND: Ground reference
5. RT/CT: Timing components connection pins
6. OSC: Oscillator frequency control pin
7. VCC: Power supply input
8. OUT: Output pin

Functional Features

• Current mode PWM control for precise regulation and stability.
• Adjustable frequency operation to optimize performance in different applications.
• Error amplifier with high gain and low offset for accurate feedback control.
• Protection features like overvoltage protection, undervoltage lockout, and thermal shutdown ensure safe operation.
• Soft-start function to prevent excessive inrush current during startup.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile use in various power supply designs.
• Excellent line and load regulation ensure stable power delivery.
• Compact SOP package enables easy integration into circuit boards.
• Comprehensive protection features enhance system reliability.
• Adjustable frequency operation provides flexibility in optimizing performance.

Disadvantages

• Limited output current capability compared to higher-power ICs.
• Requires external timing components for frequency control.

Working Principles

UCC3809P-2 operates based on the current mode control principle. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified by the internal error amplifier (COMP) and used to control the duty cycle of the PWM signal. By adjusting the duty cycle, the IC regulates the output voltage according to the desired setpoint. The oscillator (OSC) sets the switching frequency, which can be adjusted externally using timing components connected to the RT/CT pins.

Detailed Application Field Plans

UCC3809P-2 finds extensive application in the following areas:

1. Switch-mode power supplies (SMPS) for consumer electronics, industrial equipment, and automotive systems.
2. Battery chargers for portable devices, electric vehicles, and renewable energy systems.
3. DC-DC converters for voltage regulation in various electronic devices and systems.

Detailed and Complete Alternative Models

1. UCC3809P-1: Similar to UCC3809P-2 but with a different reference voltage range.
2. UCC3809P-3: Similar to UCC3809P-2 but with additional protection features.
3. UCC3809P-4: Similar to UCC3809P-2 but optimized for higher output current applications.

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

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