ON Semiconductor UC2843ADR2 Product Overview

The UC2843ADR2 is a high-performance current mode pulse width modulator (PWM) controller from ON Semiconductor, a leading manufacturer in energy-efficient innovations. This integrated circuit (IC) is designed to cater to a wide range of power supply applications, offering precision and reliability in a compact surface-mount package.

Key Features

• Adjustable Output Control: The UC2843ADR2 provides an adjustable output range from 0 to 100%, allowing for fine-tuning of the power supply to meet specific requirements.
• High-Frequency Operation: With an operating frequency up to 500 kHz, this PWM controller supports high-frequency power conversion, which can lead to smaller and more efficient power supplies.
• Trimmed Oscillator Discharge Current: The oscillator's discharge current is trimmed, ensuring stable and accurate frequency control over temperature and power supply variations.
• Current Mode Operation: Current mode control offers inherent line feed-forward, cycle-by-cycle current limiting, and easier loop compensation compared to voltage mode PWMs.
• Low Startup and Operating Current: The device features a low startup current of typically 0.5 mA and an operating current of typically 8.5 mA, enhancing overall system efficiency.
• Under-Voltage Lockout (UVLO): Both the startup and operating UVLO thresholds are specified for the UC2843ADR2, ensuring the controller operates only when the supply voltage is sufficient.

Applications

The versatility of the UC2843ADR2 makes it suitable for a variety of applications, including:

• DC-DC Converters
• Off-Line Power Supplies
• AC-DC Adapters and Chargers
• Switching Power Supplies
• LED Drivers
• Power Over Ethernet (PoE) Systems

Package and Quality

The UC2843ADR2 comes in a compact 8-pin SOIC package, making it ideal for space-constrained applications. ON Semiconductor ensures high-quality and reliability for this product, consistent with their commitment to delivering industry-leading performance. With its robust design and comprehensive features, the UC2843ADR2 is a superior choice for designers seeking to optimize their power management solutions.