FSQ0370RNA − SMPS Green Power switch, 3A, 700V, 8DIP

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.

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Product Status/Pricing/Packaging

Index	Product	Product & Eco Status	*Pricing	Packaging & Packing Info	**Package Marking Convention	Qualification Support	Compliance Certificates
0	FSQ0370RNA	Full Production ROHS Compliant	$0.97	MDIP 8L Details MDIP 8L Drawing RAIL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &2 (2-Digit Date Code) &K Line 2:Q0370RA	R_ƟJC : 20 °C/W Moisture Sensitivity Level (MSL) : NA Max Reflow Temp : 999	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

Fairchild 1,000 piece Budgetary Pricing. *
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Top mark packaging information for product FSQ0370RNA is available. **

Features

Internal Avalanche Rugged 700V SenseFET
Consumes only 0.8W at 230 V_AC & 0.5W Load withBurst-Mode Operation
Precision Fixed Operating Frequency, 100kHz
Precision Fixed Operating Frequency, 100kHz
Internal Start-up Circuit and Built-in Soft-Start
Pulse-by-Pulse Current Limiting and Auto-RestartMode
Over-Voltage Protection (OVP), Overload Protection(OLP), Internal Thermal Shutdown Function (TSD)
Under-Voltage Lockout (UVLO)
Low Operating Current (3mA)
Adjustable Peak Current Limit

Applications

Desktop PC

LCD TV

PDP TV

Application Notes

Application Note	Description
AN-4150	Design Guidelines for Flyback Converters Using FSQ-Series Fairchild Power Switch (FPS™)(569 K) 14-Jun-2011
AN-4146	Design Guidelines for Quasi-Resonant Converters Using FSCQ-Series Fairchild Power Switch (FPS™)(379 K) 05-Mar-2011

Additional Resources

Design Tools Knowledgebase – Ask a Question Find a local sales office Product change notices (PCN) How to Buy Products or Order Samples

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