FSQ0265RN Series

650V Integrated Power Switch with Valley Switching control for 16Watt offline flyback converters

Catalog

650V Integrated Power Switch with Valley Switching control for 16Watt offline flyback converters

Part	Package / Case	Package / Case	Package / Case	Supplier Device Package	Output Isolation	Fault Protection	Control Features	Voltage - Breakdown	Power (Watts)	Voltage - Start Up	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Topology
ON Semiconductor FSQ0265RN	0.3 in	8-DIP	7.62 mm	8-DIP	Isolated	Current Limiting Over Load Over Temperature Over Voltage	Sync	650 V	20 W	12 V	Through Hole	85 °C	-40 °C	20 V	8 V	67 kHz	55 kHz	Flyback
ON Semiconductor FSQ0265RL				8-LSOP	Isolated	Current Limiting Over Load Over Temperature Over Voltage	Sync	650 V	20 W	12 V	Surface Mount	85 °C	-40 °C	20 V	8 V	67 kHz	55 kHz	Flyback
ON Semiconductor FSQ0265RLX				8-LSOP	Isolated	Current Limiting Over Load Over Temperature Over Voltage	Sync	650 V	20 W	12 V	Surface Mount	85 °C	-40 °C	20 V	8 V	67 kHz	55 kHz	Flyback

Catalog

650V Integrated Power Switch with Valley Switching control for 16Watt offline flyback converters

Key Features

• Optimized for Valley Switching (VSC)

• Low EMI through Variable Frequency Control andInherent Frequency Modulation

• High Efficiency through Minimum Voltage Switching

• Narrow frequency Variation Range over Wide Load andInput Voltage Variation

• Advanced Burst-Mode Operation for Low StandbyPower Consumption

• Pulse-by-Pulse Current Limit

• Various Protection functions: Over Load Protection(OLP), Over Voltage Protection (OVP), AbnormalOver Current Protection (AOCP), Internal ThermalShutdown (TSD)

• Under Voltage Lock Out (UVLO) with Hysteresis

• Internal Start-up Circuit

• Internal High-Voltage Sense FET (650V)

• Built-in Soft-Start (15ms)

Description

A Valley Switching Converter generally shows lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for valley switching operation 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 loop compensation, and self-protection circuitry. Compared with discrete MOSFET and PWM controller solutions, the FSQ-series reduces total cost, component count, size and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for cost-effective designs of valley switching fly-back converters.