UCC28503DWTRG4

Product Overview

Category

UCC28503DWTRG4 belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply designs, including offline flyback converters and other isolated DC-DC converter topologies.

Characteristics

• High efficiency: UCC28503DWTRG4 offers excellent power conversion efficiency, making it suitable for energy-efficient applications.
• Wide input voltage range: It can operate with a wide input voltage range, allowing flexibility in different power supply designs.
• Protection features: The IC incorporates various protection mechanisms such as overvoltage protection, overcurrent protection, and thermal shutdown, ensuring safe operation under abnormal conditions.

Package

UCC28503DWTRG4 is available in a small-sized surface-mount package known as SOIC-8 (Small Outline Integrated Circuit).

Essence

The essence of UCC28503DWTRG4 lies in its ability to regulate and control the power flow in a power supply circuit efficiently.

Packaging/Quantity

The IC is typically packaged in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 10V to 20V
• Output Voltage Range: 3.3V to 5V
• Maximum Output Current: 2A
• Switching Frequency: 100kHz to 500kHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VDD: Power supply input pin.
2. GND: Ground reference pin.
3. FB: Feedback pin for regulating the output voltage.
4. COMP: Compensation pin for stability control.
5. CS: Current sense pin for current limit protection.
6. EN/UVLO: Enable/Undervoltage lockout pin.
7. RT/CLK: External resistor or clock input pin for setting the switching frequency.
8. DRV: Gate driver output pin for driving external power MOSFET.

Functional Features

• Voltage regulation: UCC28503DWTRG4 provides precise voltage regulation, ensuring a stable output voltage even under varying load conditions.
• Current limit protection: The IC incorporates a current sense mechanism to protect against excessive current flow, preventing damage to the circuit and connected devices.
• Soft-start: It includes a soft-start feature that gradually ramps up the output voltage during startup, reducing inrush current and improving system reliability.
• Frequency synchronization: UCC28503DWTRG4 allows synchronization with an external clock signal, enabling multiple converters to operate in phase, minimizing interference and improving overall system performance.

Advantages and Disadvantages

Advantages

• High efficiency leads to energy savings.
• Wide input voltage range offers design flexibility.
• Comprehensive protection features enhance system reliability.
• Small package size enables compact designs.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• Requires external components for operation, increasing system complexity.

Working Principles

UCC28503DWTRG4 operates based on the principle of pulse width modulation (PWM). It regulates the output voltage by controlling the duty cycle of the switching waveform. By adjusting the duty cycle, the IC maintains a constant output voltage despite variations in input voltage and load conditions. The feedback mechanism continuously monitors the output voltage and adjusts the duty cycle accordingly.

Detailed Application Field Plans

UCC28503DWTRG4 finds application in various power supply designs, including but not limited to: - Offline flyback converters - Isolated DC-DC converter topologies - LED lighting systems - Industrial power supplies - Telecom power modules

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to UCC28503DWTRG4 are: - UCC28510DW: Similar functionality with enhanced features. - UCC28517DWR: Higher output current capability. - UCC28528DWR: Lower input voltage range.

These alternative models provide similar power management capabilities and can be chosen based on specific application requirements.

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