The ICE2QR1765Z is a highly integrated quasi-resonant CoolSET™ - QR flyback controller from Infineon Technologies, specifically designed for off-line power supply applications. This controller facilitates the creation of energy-efficient and cost-effective power supplies, particularly in applications where stringent energy efficiency standards need to be met. The ICE2QR1765Z combines several features to optimize performance and minimize component count.

Applications

• Adapter and Charger Applications
• Auxiliary Power Supplies
• Open Frame Power Supplies
• Consumer Electronics Power Supplies
• Industrial Power Supplies

Features

• Quasi-Resonant (QR) Operation for High Efficiency
• Active Burst Mode (ABM) for Low Standby Power
• Integrated Startup Cell
• Built-in Soft-Start Feature
• Frequency Jittering for Reduced EMI
• Comprehensive Protection Features (Overvoltage, Overcurrent, Overload, Overtemperature)
• Adjustable Switching Frequency
• BiCMOS Technology for High Performance and Low Power Consumption

Benefits

• Reduced system cost due to high integration level
• Improved energy efficiency, meeting stringent requirements
• Simplified design with built-in protection features
• Minimized EMI emissions through frequency jittering
• Enhanced reliability with comprehensive protection mechanisms
• Optimized performance in various operating conditions
• Lower standby power consumption for increased overall efficiency

Additional Details

The ICE2QR1765Z operates using a quasi-resonant flyback topology. This approach minimizes switching losses by turning on the MOSFET at the valley of the drain-source voltage, leading to significant efficiency improvements. The Active Burst Mode (ABM) further reduces standby power consumption by entering a burst mode during light load conditions. The integrated startup cell eliminates the need for an external startup resistor, simplifying the design and improving efficiency. The soft-start feature prevents stress on components during startup. The frequency jittering function reduces EMI emissions by spreading the energy across a wider frequency range. The comprehensive protection features ensure safe and reliable operation under various fault conditions. The adjustable switching frequency allows designers to optimize the performance for specific application requirements. The BiCMOS technology contributes to high performance and low power consumption. The device is available in a DSO-8 package. The ICE2QR1765Z is a highly versatile and efficient controller suitable for a wide range of off-line power supply applications, offering a balance of performance, cost-effectiveness, and reliability.