UCC2808D-1G4

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - Low-power current mode PWM controller - Designed for offline and DC-to-DC converter applications - Provides necessary features to implement off-line fixed-frequency, peak current-mode control schemes - Suitable for low-power applications such as battery chargers, power adapters, and auxiliary power supplies

Package: SOIC-8

Essence: The UCC2808D-1G4 is a low-power current mode PWM controller that offers essential features for implementing off-line fixed-frequency, peak current-mode control schemes. It is widely used in various low-power applications.

Packaging/Quantity: The UCC2808D-1G4 is available in a standard SOIC-8 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 7 V to 25 V
• Output Voltage Range: 0 V to 5.5 V
• Operating Temperature Range: -40°C to 85°C
• Maximum Duty Cycle: 100%
• Switching Frequency: 50 kHz to 1 MHz
• Output Current: Up to 500 mA

Pin Configuration

The UCC2808D-1G4 has the following pin configuration:

```

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| | --| VREF | --| COMP | --| FB | --| CS | --| GND | --| RT/CT | --| VCC | |___________| ```

Functional Features

1. Low-Power Operation: The UCC2808D-1G4 is designed for low-power applications, making it suitable for battery chargers, power adapters, and auxiliary power supplies.
2. Current Mode Control: It provides peak current-mode control schemes, allowing efficient regulation of output voltage and current.
3. Wide Input Voltage Range: The IC can operate within a wide input voltage range of 7 V to 25 V, making it versatile for various power supply designs.
4. Flexible Switching Frequency: The UCC2808D-1G4 supports a wide range of switching frequencies from 50 kHz to 1 MHz, enabling optimization for different applications.

Advantages

• Low-power consumption
• Compact SOIC-8 package
• Wide input voltage range
• Flexible switching frequency
• Suitable for battery chargers, power adapters, and auxiliary power supplies

Disadvantages

• Limited output current capability (up to 500 mA)
• Not suitable for high-power applications

Working Principles

The UCC2808D-1G4 operates based on the current mode control principle. It regulates the output voltage by sensing the current flowing through the power switch and adjusting the duty cycle accordingly. This control scheme ensures stable and efficient power conversion.

Application Field Plans

The UCC2808D-1G4 is commonly used in the following application fields:

1. Battery Chargers: It can be employed in low-power battery charging circuits, ensuring efficient and reliable charging for portable devices.
2. Power Adapters: The IC enables compact and energy-efficient power adapters for various electronic devices.
3. Auxiliary Power Supplies: It finds application in auxiliary power supplies for appliances, providing regulated power for control circuits and peripherals.

Alternative Models

1. UCC2808D-1: Similar to UCC2808D-1G4 but without the "G4" suffix.
2. UCC2808D-2G4: A variant with additional features and improved specifications.
3. UCC2808D-3G4: Another variant with enhanced performance characteristics.

These alternative models offer different specifications and features, allowing designers to choose the most suitable option for their specific requirements.

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