UCC28503DWTR

Product Overview

Category

UCC28503DWTR 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 LED drivers.

Characteristics

• High efficiency: UCC28503DWTR offers excellent power conversion efficiency, reducing energy losses.
• Wide input voltage range: It can operate with input voltages ranging from 4.5V to 65V, making it suitable for a wide range of applications.
• Adjustable output voltage: The output voltage can be easily adjusted using external components.
• Protection features: This IC incorporates various protection mechanisms such as overvoltage protection, undervoltage lockout, and thermal shutdown.

Package

UCC28503DWTR is available in a small-sized surface-mount package known as SOIC-8 (Small Outline Integrated Circuit).

Essence

The essence of UCC28503DWTR lies in its ability to efficiently regulate and control power flow in different applications, ensuring stable and reliable operation.

Packaging/Quantity

UCC28503DWTR is typically packaged in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 65V
• Output Voltage Range: Adjustable
• Maximum Output Current: 1A
• Switching Frequency: Up to 1MHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. COMP: Compensation pin for feedback control loop
4. FB: Feedback pin for output voltage regulation
5. EN: Enable pin for turning the IC on/off
6. VREF: Reference voltage output pin
7. CS: Current sense pin for current limit control
8. SW: Switching node pin connected to the power switch

Functional Features

• Constant voltage (CV) and constant current (CC) regulation modes
• Soft-start function for smooth startup and reduced inrush current
• Frequency foldback protection to prevent transformer saturation
• Cycle-by-cycle current limit for overcurrent protection
• Adjustable switching frequency for optimization of efficiency and size

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power losses
• Wide input voltage range allows for versatile applications
• Compact package size enables space-saving designs
• Comprehensive protection features enhance system reliability

Disadvantages

• Limited maximum output current may not be suitable for high-power applications
• Requires external components for voltage adjustment and feedback control

Working Principles

UCC28503DWTR operates based on a pulse-width modulation (PWM) control scheme. It regulates the output voltage by adjusting the duty cycle of the internal power switch. The feedback loop compares the output voltage with a reference voltage, generating an error signal that controls the duty cycle. This closed-loop control mechanism ensures accurate voltage regulation.

Detailed Application Field Plans

UCC28503DWTR finds applications in various fields, including: 1. Switch-mode power supplies for computers, telecommunication equipment, and industrial systems. 2. Battery chargers for portable devices, electric vehicles, and renewable energy systems. 3. LED drivers for lighting applications, such as streetlights, automotive lighting, and display backlighting.

Detailed and Complete Alternative Models

Some alternative models to UCC28503DWTR include: - LM5117: A similar IC from Texas Instruments with adjustable frequency and synchronous rectification. - LT3845: A comparable IC from Analog Devices featuring a wide input voltage range and high switching frequency. - MAX668: An alternative IC from Maxim Integrated offering integrated protection features and adjustable output voltage.

Note: The above alternatives are provided for reference purposes and may have different specifications and pin configurations. It is recommended to consult the respective datasheets for detailed information.

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