FSCQ0765RT − 7A/650V QRC Power Switch

A Quasi-Resonant Converter (QRC) typically shows lower EMI and higher power conversion efficiency compared to conventional hard-switched converter with a fixed switching frequency. Therefore, a QRC is well suited for noise-sensitive applications, such as color TV and audio. Each product in the FSCQ-Series contains an integrated Pulse Width Modulation (PWM) controller and a SenseFET, and is specifically designed for quasiresonant off-line Switch Mode Power Supplies (SMPS) 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 a loop compensation, and self protection circuitry. Compared with a discrete MOSFET and PWM controller solution, the FSCQ-Series can reduce total cost, component count, size, and weight, while simultaneously increasing efficiency, productivity, and system reliability. These devices provide a basic platform that is well suited for cost-effective designs of quasi-resonant switching flyback converters.

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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	FSCQ0765RTYDTU	Full Production Green as of Oct 2010	$1.43	TO-220F 5L Details TO-220F 5L Drawing RAIL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &3 (3-Digit Date Code) &K Line 2:CQ0765RT	ESD (HBM) : 2000 V R_ƟJC : 2.6 °C/W Moisture Sensitivity Level (MSL) : NA Show more... Max Reflow Temp : 999	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

Fairchild 1,000 piece Budgetary Pricing. *
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Features

Optimized for Quasi-Resonant Converter (QRC)
Advanced Burst-Mode operation for under 1 W standby power consumption
Pulse by Pulse Current Limit
Over load protection (OLP) - Auto restart
Over voltage protection (OVP) - Auto restart
Abnormal Over Current Protection (AOCP) - Latch
Internal Thermal Shutdown (TSD) - Latch
Under Voltage Lock Out (UVLO) with hysteresis
Low Startup Current (typical: 25uA)
Internal High Voltage SenseFET
Built-in Soft Start (20ms)
Extended Quasi-resonant Switching for Wide Load Range

Applications

CRT TV

Application Notes

Application Note	Description
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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