UCC2808ADTR-2

Product Overview

Category

UCC2808ADTR-2 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

• Low-power, high-performance voltage mode PWM controller
• Wide input voltage range
• Adjustable frequency and maximum duty cycle
• Integrated oscillator with programmable soft-start
• Protection features such as overvoltage and undervoltage lockout

Package

UCC2808ADTR-2 is available in a small outline package (SOT-23-6).

Essence

The essence of UCC2808ADTR-2 lies in its ability to efficiently regulate and control power in various electronic systems.

Packaging/Quantity

This product is typically packaged in reels, with 3000 units per reel.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to VCC
• Maximum Duty Cycle: 100%
• Oscillator Frequency Range: 50kHz to 1MHz
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

UCC2808ADTR-2 has six pins arranged as follows:

```

---

| | --| VREF |-- --| COMP |-- --| FB |-- --| GND |-- --| RT/CT |-- |_______| ```

1. VREF: Reference voltage output pin.
2. COMP: Error amplifier output pin.
3. FB: Feedback input pin.
4. GND: Ground pin.
5. RT/CT: Timing resistor/capacitor connection pin.

Functional Features

• Voltage mode control for precise regulation.
• Adjustable frequency and maximum duty cycle for flexibility.
• Integrated oscillator with programmable soft-start for smooth power-up.
• Overvoltage and undervoltage lockout protection for system safety.

Advantages and Disadvantages

Advantages

• Low-power consumption.
• Wide input voltage range allows for versatile applications.
• Adjustable frequency and duty cycle provide customization options.
• Integrated protection features enhance system reliability.

Disadvantages

• Limited output voltage range.
• Requires external timing resistor/capacitor for operation.

Working Principles

UCC2808ADTR-2 operates based on the voltage 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 adjust the duty cycle of the PWM signal. By regulating the duty cycle, the output voltage can be controlled within the desired range.

Detailed Application Field Plans

UCC2808ADTR-2 finds application in various power management systems, including but not limited to: - Switching power supplies - Battery chargers - LED drivers - Industrial automation equipment - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to UCC2808ADTR-2 are: - LM3481: High-performance voltage mode PWM controller. - UC3843: Current-mode PWM controller. - LT1241: Low-power voltage mode PWM controller.

These alternative models can be considered based on specific application requirements and design constraints.

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