FSCQ0765R

FSCQ 0765 R

A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency compared 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 SenseFET, and is specifically designed for quasiresonant off-line Switch Mode Power Supplies (SMPS) with minimal external components. The PWM controller includes an integrated fixed frequency oscillator, under voltage lockout, leading edge blanking (LEB), optimized gate driver, internal soft start, temperature-compensated precise current sources for a loop compensation, and self protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSCQ-Series can reduce total cost, component 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.

Features

Optimized for Quasi-Resonant Converter (QRC)

Advanced Burst-Mode operation for under 1 W 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: 25uA)

Internal High Voltage SenseFET

Built-in Soft Start (20ms)

Extended Quasi-resonant Switching for Wide Load Rang