ON Semiconductor UC2845BDR2 Product Overview

The UC2845BDR2 is a high-performance current mode PWM controller from ON Semiconductor, designed for a wide range of power supply applications. This integrated circuit (IC) is tailored to deliver precise power control and management, ensuring efficiency and reliability in systems such as DC-DC converters, AC-DC power supplies, battery chargers, and LED drivers.

Key Features

• Trimmed Oscillator Discharge Current: The oscillator discharge current is trimmed to ensure stable and accurate frequency control over temperature and power supply variations.
• Current Mode Operation: The UC2845BDR2 operates in current mode, providing improved transient response, simplified loop compensation, and inherent pulse-by-pulse current limiting.
• High Current Totem Pole Output: The totem pole output is capable of sourcing and sinking high current, ideal for driving a power MOSFET or IGBT directly.
• Automatic Feed-Forward Compensation: This feature helps maintain loop stability across a wide range of input voltages.
• Under-Voltage Lockout (UVLO): Both start-up and operating power supply voltage levels are maintained by the UVLO feature, protecting the device and the power system.
• Soft-Start Function: The soft-start function limits the inrush current during start-up, contributing to system reliability.
• Low Startup and Operating Current: The device is designed to minimize start-up and operating current, enhancing overall efficiency.

Applications

The UC2845BDR2 is versatile and can be used in various applications that require efficient power management. Some of the common applications include:

• Switching Power Supplies
• Power Factor Correction Circuits
• Offline Power Converters
• DC-DC Converters
• LED Lighting Systems

Quality and Environmental Compliance

ON Semiconductor is committed to providing environmentally friendly solutions. The UC2845BDR2 is compliant with RoHS (Restriction of Hazardous Substances) directives, ensuring that it is manufactured with a focus on environmental safety and sustainability.

Ordering and Packaging

Available in an SOIC-8 package, the UC2845BDR2 is offered in tape and reel packaging, facilitating efficient handling and assembly processes in high-volume production environments.