CQ1265RT Datasheet | Fairchild Semiconductor

Features - Optimized for Quasi-Resonant Converter (QRC) .. - Advanced Burst-Mode Operation for under 1W Description A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency pared to conventional hard-switched converter with a fixed switching frequency. Therefore, a QRC is well suited for noise-sensitive applications, such as color TV and audio. Each product in the FSCQ-Series contains an integrated Pulse Width Modulation (PWM) controller and a Sense FET, and is specifically designed for quasiresonant off-line Switch Mode Power Supplies (SMPS) with minimal external ponents. The PWM controller includes an integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature-pensated precise current sources for a loop pensation, and self protection circuitry. pared with a discrete MOSFET and PWM controller solution, the FSCQ-Series can reduce total cost, ponent count, size, and weight, while simultaneously increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for cost-effective designs of quasi-resonant switching flyback converters. Standby Power Consumption - Pulse-by-Pulse Current Limit - Over Load Protection (OLP) - Auto Restart - Over Voltage Protection (OVP) - Auto Restart - Abnormal Over Current Protection (AOCP) - Latch - Internal Thermal Shutdown (TSD) - Latch - Under Voltage Lock Out (UVLO) with Hysteresis - Low Startup Current (typical: 25µA) - Internal High Voltage Sense FET - Built-in Soft Start (20ms) - Extended Quasi-Resonant Switching Applications - CTV - Audio Amplifier Related Application Notes - AN4146: Design Guidelines for Quasi-Resonant Converters Using FSCQ-Series Fairchild Power Switch. - AN4140: Transformer Design Consideration for Off-Line Flyback Converters Using Fairchild Power Switch. Ordering Information Product Number FSCQ0565RTYDTU FSCQ0765RTYDTU...