UCC2808APW-1

Product Overview

Category

UCC2808APW-1 belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This product is commonly used in various power supply systems, including switch-mode power supplies (SMPS), battery chargers, and LED drivers.

Characteristics

• UCC2808APW-1 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 device offers excellent line and load regulation, ensuring stable and reliable power delivery.
• It incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• UCC2808APW-1 provides precise control over output voltage and current, enabling efficient power conversion.

Package and Quantity

UCC2808APW-1 is available in a small-sized 8-pin TSSOP (Thin Shrink Small Outline Package). It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 6V
• Maximum Switching Frequency: 500kHz
• Operating Temperature Range: -40°C to 85°C
• Supply Current: 2mA (typical)

Pin Configuration

The UCC2808APW-1 package consists of eight pins labeled as follows:

1. COMP: Compensation pin for feedback loop stability.
2. CS: Current sense input for current limit control.
3. GND: Ground reference for the IC.
4. FB: Feedback pin for regulating the output voltage.
5. VREF: Reference voltage output for external components.
6. VCC: Power supply input for the IC.
7. OUT: Output pin for driving external power devices.
8. RT/CT: Timing components connection for setting the switching frequency.

Functional Features

• Voltage mode control with cycle-by-cycle current limiting.
• Adjustable soft-start feature to prevent inrush current during startup.
• Error amplifier with high gain and low offset voltage for accurate regulation.
• Integrated oscillator for generating the switching frequency.
• Pulse skipping mode for improved efficiency at light loads.
• Built-in protection features such as overvoltage, undervoltage, and thermal shutdown.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile power supply designs.
• Excellent line and load regulation ensure stable output voltage.
• Compact package size enables space-efficient circuit layouts.
• Precise control over output voltage and current for efficient power conversion.
• Integrated protection features enhance system reliability.

Disadvantages

• Limited maximum switching frequency may not be suitable for certain high-frequency applications.
• Requires external components for proper operation, increasing overall system complexity.

Working Principles

UCC2808APW-1 operates based on the voltage mode control technique. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified 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 according to the desired setpoint.

The device also incorporates various protection mechanisms to safeguard the power supply system. Overvoltage protection prevents excessive output voltage, undervoltage lockout ensures proper operation under low input voltage conditions, and thermal shutdown protects against excessive temperature.

Application Field Plans

UCC2808APW-1 finds extensive application in the following fields:

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. LED drivers for lighting applications, including residential, commercial, and automotive lighting.

Alternative Models

For those seeking alternative options, the following models can be considered:

1. UCC2808APW: Similar to UCC2808APW-1 but without the specific operating temperature range (-40°C to 85°C).
2. UCC2808ADW: Dual-output version of UCC2808APW-1 with additional features for driving multiple power stages.
3. UCC2808AQDWREP: Enhanced reliability version of UCC2808APW-1 with extended qualification standards.

These alternative models provide similar functionality and can be chosen based on specific application requirements.

Word count: 615 words