FSQ0765R Fairchild Semiconductor, FSQ0765R Datasheet

FSQ0765R

Manufacturer Part Number

FSQ0765R

Description

(FSQ0565R / FSQ0765R) Green-Mode Fairchild Power Switch

Manufacturer

Fairchild Semiconductor

Datasheet

1.FSQ0765R.pdf (22 pages)

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FSQ0565R, FSQ0765R Rev. 1.0.0

FSQ0565R, FSQ0765R

Green-Mode Fairchild Power Switch (FPS™) for

Quasi-Resonant Operation -

Features

Applications

Related Resourses

Visit: http://www.fairchildsemi.com/apnotes/ for:

Optimized for Quasi-Resonant Converter (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), Abnormal

Over-Current Protection (AOCP), Internal Thermal

Shutdown (TSD) with Hysteresis, Output Short

Protection (OSP)

Under-Voltage Lockout (UVLO) with Hysteresis

Internal Start-up Circuit

Internal High-Voltage Sense FET (650V)

Built-in Soft-Start (15ms)

Power Supply for LCD TV and Monitor, VCR, SVR,

STB, and DVD & DVD Recorder

Adapter

AN-4134: Design Guidelines for Offline Forward

Converters Using Fairchild Power Switch (FPS

AN-4137: Design Guidelines for Offline Flyback

Converters Using Fairchild Power Switch (FPS

AN-4140: Transformer Design Consideration for

Offline Flyback Converters Using Fairchild Power

Switch (FPS

AN-4141: Troubleshooting and Design Tips for

Fairchild Power Switch (FPS

AN-4145: Electromagnetic Compatibility for Power

Converters

AN-4147: Design Guidelines for RCD Snubber of

Flyback

AN-4148: Audible Noise Reduction Techniques for

Fairchild Power Switch Fairchild Power Switch(FPS

Applications

AN-4150: Design Guidelines for Flyback Converters

Using FSQ-Series Fairchild Power Switch (FPS

™

)

™

) Flyback Applications

™

)

™)

Description

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

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 that is well suited

for cost-effective designs of quasi-resonant switching

flyback converters.

Low EMI and High Efficiency

Modulation

(PWM)

controller

www.fairchildsemi.com

October 2007

and

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