FSQ0370RLA Series

700V Integrated Power Switch with 100kHz frequency and adjustable current limit for 19W offline flyback converters

Catalog

700V Integrated Power Switch with 100kHz frequency and adjustable current limit for 19W offline flyback converters

Part	Operating Temperature [Max]	Operating Temperature [Min]	Duty Cycle	Internal Switch(s)	Topology	Supplier Device Package	Voltage - Start Up	Fault Protection	Frequency - Switching	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Isolation	Power (Watts)	Voltage - Breakdown	Mounting Type
ON Semiconductor FSQ0370RLA	85 °C	-40 °C	60 %		Flyback	8-LSOP	12 V	Current Limiting Over Load Over Temperature Over Voltage	100 kHz	20 V	8 V	Isolated	27 W	700 V	Surface Mount

Catalog

700V Integrated Power Switch with 100kHz frequency and adjustable current limit for 19W offline flyback converters

Key Features

• Internal Avalanche Rugged 700V SenseFET

• Consumes Only 0.8W at 230VACand 0.5W Load with Burst-Mode Operation

• Precision Fixed Operating Frequency: 100kHz

• Internal Startup Circuit and Built-in Soft-Start

• Pulse-by-Pulse Current Limiting, Auto-Restart Mode

• Over-Voltage Protection (OVP), Overload Protection (OLP), Internal Thermal Shutdown Function (TSD)

• Under-Voltage Lockout (UVLO)

• Low Operating Current: 3mA

• Adjustable Peak Current Limit

Description

The FSQ0370 consists of an integrated Current Mode Pulse Width Modulator (PWM) and an avalanche rugged 700V SenseFET. It is specifically designed for high-performance offline Switched Mode Power Supplies (SMPS) with minimal external components. The integrated PWM controller features include: a fixed-frequency generating oscillator, Under-Voltage Lockout (UVLO) protection, Leading-Edge Blanking (LEB), an optimized gate turn-on / turn-off driver, Thermal Shutdown (TSD) protection, and temperature-compensated precision current sources for loop compensation and fault protection circuitry.Compared to a discrete MOSFET and controller or RCC switching converter solution, the FSQ0370 reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for the design of cost-effective flyback converters, such as in PC auxiliary power supplies.