FSQ0365RN Series

650V Integrated Power Switch with Valley Switching control for 19Watt offline flyback converters

Catalog

650V Integrated Power Switch with Valley Switching control for 19Watt offline flyback converters

Part	Output Isolation	Power (Watts)	Mounting Type	Topology	Fault Protection	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Control Features	Voltage - Breakdown	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Start Up	Supplier Device Package	Package / Case	Package / Case	Package / Case
ON Semiconductor FSQ0365RL	Isolated	25 W	Surface Mount	Flyback	Current Limiting Over Load Over Temperature Over Voltage	20 V	8 V	85 °C	-40 °C	Sync	650 V	67 kHz	55 kHz	12 V	8-LSOP
ON Semiconductor FSQ0365RLX	Isolated	25 W	Surface Mount	Flyback	Current Limiting Over Load Over Temperature Over Voltage	20 V	8 V	85 °C	-40 °C	Sync	650 V	67 kHz	55 kHz	12 V	8-LSOP
ON Semiconductor FSQ0365RN	Isolated	25 W	Through Hole	Flyback	Current Limiting Over Load Over Temperature Over Voltage	20 V	8 V	85 °C	-40 °C	Sync	650 V	67 kHz	55 kHz	12 V	8-DIP	0.3 in	8-DIP	7.62 mm

Catalog

650V Integrated Power Switch with Valley Switching control for 19Watt 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.