Product Overview: UC2843ADR2G by ON Semiconductor

The UC2843ADR2G, manufactured by ON Semiconductor, is a high-performance current mode pulse width modulator (PWM) controller integrated circuit designed for a wide range of power supply applications. This versatile component is particularly well-suited for off-line and DC-to-DC converter configurations, providing cost-effective solutions for systems requiring tight control and regulation of power.

Key Features

• Adjustable Output Control: The UC2843ADR2G features an adjustable output range from 0 to 100%, allowing for precise control over the power supply's output voltage and current.
• High-Frequency Operation: With an operating frequency up to 500 kHz, this PWM controller can be used in applications requiring high-frequency power conversion, which can result in smaller and more efficient power supplies.
• Low Startup and Operating Current: The device's low startup current (typically 0.5 mA) and low operating current (typically 8.5 mA) minimize power losses and improve efficiency, making it ideal for power-sensitive applications.
• Trimmed Oscillator for Precise Frequency Control: The oscillator frequency is trimmed to a tight tolerance, ensuring consistent and reliable operation across multiple devices and applications.
• Automatic Feed Forward Compensation: This feature helps maintain stability and performance across varying input voltages and output load conditions.
• Pulse-by-Pulse Current Limiting: Enhanced protection is provided through pulse-by-pulse current limiting, which guards the device and the power supply from overcurrent conditions.
• Under-Voltage Lockout (UVLO): The UC2843ADR2G includes UVLO with hysteresis, preventing the device from operating at insufficient supply voltages, which could lead to unpredictable performance.

Applications

The UC2843ADR2G is ideal for a variety of applications where efficient power control is essential. Common applications include switch-mode power supplies (SMPS), DC-DC converters, battery chargers, power factor correction circuits, and LED drivers. Its robust design and comprehensive feature set make it a preferred choice for designers looking to implement a reliable power management solution.

Package and Availability

This PWM controller is available in a compact 8-pin SOIC package, providing a space-saving solution for PCB layouts. The UC2843ADR2G by ON Semiconductor is widely available through various electronics distributors, ensuring ease of procurement for both small-scale projects and large-volume production.