UCC3809N-2

Product Overview

Category

UCC3809N-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 systems, including switch-mode power supplies (SMPS), battery chargers, and DC-DC converters.

Characteristics

• UCC3809N-2 is a high-performance voltage mode PWM controller.
• It operates with a wide input voltage range, making it suitable for different power supply designs.
• The IC offers precise regulation and control over the output voltage and current.
• It incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• UCC3809N-2 provides excellent line and load regulation, ensuring stable and reliable power delivery.

Package

UCC3809N-2 is available in a standard 8-pin dual in-line package (DIP), which facilitates easy integration into circuit boards.

Essence

The essence of UCC3809N-2 lies in its ability to efficiently regulate and control power supply systems, ensuring optimal performance and reliability.

Packaging/Quantity

UCC3809N-2 is typically packaged in reels or tubes, with each reel or tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Input Voltage Range: 4.5V to 12V
• Output Voltage Range: Adjustable, typically up to 30V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: Adjustable, typically up to 500kHz

Detailed Pin Configuration

1. VREF: Reference voltage pin for setting the desired output voltage.
2. COMP: Compensation pin for loop stability adjustment.
3. FB: Feedback pin for monitoring the output voltage.
4. CS: Current sense pin for current regulation and protection.
5. GND: Ground reference pin.
6. RT/CT: Timing components connection pins for setting the switching frequency.
7. VCC: Power supply input pin.
8. OUT: Output pin for connecting to the power supply circuitry.

Functional Features

• Voltage mode control with adjustable feedback loop compensation.
• Soft-start feature for gradual power-up, reducing inrush current.
• Overvoltage protection (OVP) to prevent damage to the load.
• Undervoltage lockout (UVLO) for reliable operation under low input voltage conditions.
• Thermal shutdown protection to prevent overheating of the IC.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• Precise regulation and control ensure stable power delivery.
• Integrated protection features enhance system reliability.
• Compact package facilitates easy integration into circuit designs.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• Requires external timing components for setting the switching frequency.

Working Principles

UCC3809N-2 operates based on the voltage mode control technique. It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is then processed and used to adjust the duty cycle of the PWM (Pulse Width Modulation) signal. By controlling the duty cycle, the IC regulates the output voltage and maintains it at the desired level.

Detailed Application Field Plans

UCC3809N-2 finds extensive application in various power management systems, including: 1. Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial machinery. 2. Battery chargers for portable devices, electric vehicles, and renewable energy systems. 3. DC-DC converters for voltage level conversion in automotive electronics, consumer electronics, and industrial automation.

Detailed and Complete Alternative Models

1. UCC3809N-1: Similar to UCC3809N-2 but with a different set of specifications.
2. UCC3809N-3: Another variant with specific features catering to different application requirements.
3. UCC3809N-4: An alternative model offering enhanced protection features and wider input voltage range.

These alternative models provide flexibility in choosing the most suitable IC based on specific design considerations and application needs.

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