FSQ500L Series

700V Integrated Power Switch with 130kHz frequency and no bias winding for 2.5W offline flyback converters

Catalog

700V Integrated Power Switch with 130kHz frequency and no bias winding for 2.5W offline flyback converters

Part	Output Isolation	Supplier Device Package	Fault Protection	Power (Watts)	Package / Case	Package / Case	Package / Case	Voltage - Start Up	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Breakdown	Topology	Duty Cycle	Mounting Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching	Internal Switch(s)	Control Features
ON Semiconductor FSQ500N	Isolated	8-DIP	Current Limiting Over Load Over Temperature	6.5 W	0.3 in	8-DIP	7.62 mm	6 V	85 °C	-40 °C	700 V	Flyback	60 %	Through Hole	10 V	5 V	130 kHz
ON Semiconductor FSQ500L	Isolated	SOT-223-4	Current Limiting Over Load Over Temperature	3 W		TO-261-4 TO-261AA		6 V	85 °C	-40 °C	700 V	Flyback	60 %	Surface Mount	10 V	5 V	130 kHz		Soft Start

Catalog

700V Integrated Power Switch with 130kHz frequency and no bias winding for 2.5W offline flyback converters

Key Features

• Single Chip 700V SenseFET Power Switch

• Precision Fixed Operating Frequency: 130kHz

• No-load consumption 250mW at 265VACwith Burst Mode and Down to 60mW with External Bias

• Internal Startup Switch

• Soft-Start Time Tuned by External Capacitor

• Under-Voltage Lockout (UVLO) with Hysteresis

• Pulse-by-Pulse Current Limit

• Overload Protection (OLP) and Internal Thermal Shutdown Function (TSD) with Hysteresis

• Auto-Restart Mode

• No Need for Auxiliary Bias Winding

Description

The FSQ500L is specially designed for a replacement of linear power supplies with low cost. This device combines current-mode Pulse Width Modulator (PWM) with a senseFET. The integrated PWM controller features include: a fixed oscillator, Under Voltage Lockout (UVLO) protection, Overload Protection (OLP), Leading-Edge Blanking (LEB), an optimized gate turn-on/turn-off driver, Thermal Shutdown (TSD) protection with hysteresis, and temperature-compensated precision-current sources for loop compensation. When compared to a linear power supply, the FSQ500L device reduces total size and weight, while increasing efficiency, productivity, and system reliability. This device provides a basic platform for cost-effective flyback converters