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Products » FSQ0765RQ Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation

FSQ0765RQ − Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation

A Quasi-Resonant Converter (QRC) 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 quasi-resonant operation and Alternating Valley Switching (AVS). The PWM controller includes an integrated fixed-frequency oscillator, Under-Voltage Lockout (UVLO), 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 FSQ-series can reduce total cost, component count, size, and weight; while simultaneously increasing efficiency, productivity, and system reliability. This device provides a basic platform 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
2	FSQ0765RQUDTU	Obsolete as of 25-Nov-2012 Green as of Jul 2011	N/A	TO-220F 6L Details TO-220F 6L Drawing RAIL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &3 (3-Digit Date Code) Show more... Line 2:&E (Space) &E (Space) &E (Space) &E (Space) &E (Space) Q Line 3:Q0765R	ESD (CDM) : 2000 V ESD (HBM) : 2000 V RTHETA (JA) : 50 °C/W Show more... R_ƟJC : 2.8 °C/W Moisture Sensitivity Level (MSL) : NA Max Reflow Temp : 999	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG
0	FSQ0765RQLDTU	Full Production Green as of Jul 2011	$1.75	TO-220F 6L Details TO-220F 6L Drawing RAIL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &3 (3-Digit Date Code) &K Show more... Line 2:&E (Space) &E (Space) &E (Space) &E (Space) &E (Space) Q Line 3:Q0765R	ESD (CDM) : 2000 V ESD (HBM) : 2000 V RTHETA (JA) : 50 °C/W Show more... R_ƟJC : 2.8 °C/W Moisture Sensitivity Level (MSL) : NA Max Reflow Temp : 999	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG
0	FSQ0765RQWDTU	Full Production Green as of Jul 2011	$1.63	TO-220F 6L Details TO-220F 6L Drawing RAIL	Line 1:$Y (Fairchild logo) &Z (Plant Code) &3 (3-Digit Date Code) &K Show more... Line 2:&E (Space) &E (Space) &E (Space) &E (Space) &E (Space) Q Line 3:Q0765R	ESD (CDM) : 2000 V ESD (HBM) : 2000 V RTHETA (JA) : 50 °C/W Show more... R_ƟJC : 2.8 °C/W Moisture Sensitivity Level (MSL) : NA Max Reflow Temp : 999	RoHS IPC1752 RoHS/REACH/JIG RoHS/REACH/JIG

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Fairchild 1,000 piece Budgetary Pricing. *
If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
Top mark packaging information for product FSQ0765RQ is available. **

Features

Optimized for Quasi-Resonant Converters (QRC)
Low EMI through Variable Frequency Control and AVS (Alternating Valley Switching)
High-Efficiency through Minimum Voltage Switching
Narrow Frequency Variation Range over Wide Load and Input Voltage Variation
Advanced Burst-Mode Operation for Low Standby Power Consumption
Simple Scheme for Sync Voltage Detection
Pulse-by-Pulse Current Limit
Various Protection Functions: Overload Protection (OLP), Over-Voltage Protection (OVP), Internal
Thermal Shutdown (TSD) with Hysteresis,
Output Short Protection (OSP)
Under-Voltage Lockout (UVLO) with Hysteresis
Internal Startup Circuit
Internal High-Voltage Sense FET (650 V)
Built-in Soft-Start (17.5 ms)

Applications

LCD 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

Reference Designs

Application	Document Number	Featured Products	Output Power	Input Voltage	Topology
Power Supply LCD Monitor	RD-204	FSQ0765RQ, FSQ0765RS	60W	85-265V_AC	Flyback Converter

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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