UCC2804PWTRG4

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High-performance current-mode PWM controller - Designed for use in offline and DC-to-DC power supplies - Provides precise control of output voltage and current - Offers protection features such as overvoltage and overcurrent protection

Package: TSSOP-14

Essence: The UCC2804PWTRG4 is a high-performance current-mode PWM controller used in power management applications. It provides precise control of output voltage and current, making it suitable for various power supply designs.

Packaging/Quantity: The UCC2804PWTRG4 is available in a TSSOP-14 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 8V to 35V
• Operating Temperature Range: -40°C to 85°C
• Maximum Duty Cycle: 100%
• Oscillator Frequency Range: 50kHz to 500kHz
• Output Current: ±1A
• Output Voltage: Adjustable

Pin Configuration

The UCC2804PWTRG4 has the following pin configuration:

```

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

Functional Features

1. Current-Mode Control: The UCC2804PWTRG4 utilizes current-mode control to regulate the output voltage and current accurately.
2. Protection Features: It offers overvoltage and overcurrent protection, ensuring the safety and reliability of the power supply.
3. Wide Input Voltage Range: With a supply voltage range of 8V to 35V, it can be used in various applications.
4. Adjustable Output Voltage: The output voltage can be adjusted according to the specific requirements of the power supply design.

Advantages

• Precise control of output voltage and current
• Protection features enhance system reliability
• Wide input voltage range allows for versatile applications
• Adjustable output voltage provides flexibility in power supply design

Disadvantages

• Limited output current capability (±1A)
• Requires external components for complete power supply implementation

Working Principles

The UCC2804PWTRG4 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 used to adjust the duty cycle of the PWM signal, which controls the output voltage and current. By continuously monitoring and adjusting the duty cycle, the UCC2804PWTRG4 maintains precise regulation of the power supply.

Application Field Plans

The UCC2804PWTRG4 is commonly used in the following application fields:

1. Offline Power Supplies: It is suitable for offline power supplies used in various electronic devices such as televisions, computers, and home appliances.
2. DC-to-DC Converters: It can be employed in DC-to-DC converters for voltage step-up or step-down applications.
3. LED Lighting: The UCC2804PWTRG4 can be utilized in LED lighting systems to regulate the power supply for efficient and reliable operation.

Alternative Models

1. UCC2804N: DIP-14 package, similar specifications and features.
2. UCC3804PWTRG4: TSSOP-14 package, enhanced protection features.
3. UCC2804D: SOIC-8 package, lower cost option with reduced pin count.

These alternative models offer similar functionality and can be considered as substitutes for the UCC2804PWTRG4 in various applications.

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