FSQ0565R, FSQ0765R Green-Mode Farichild Power Switch (FPS) for Quasi-Resonant Operation
June 2008
FSQ0565R, FSQ0765R
Green-Mode Fairchild Power Switch (FPS) for
Quasi-Resonant Operation - Low EMI and High Efficiency
Features Description
Optimized for Quasi-Resonant Converter (QRC) A Quasi-Resonant Converter (QRC) generally shows
lower EMI and higher power conversion efficiency than a
Low EMI through Variable Frequency Control and AVS
(Alternating Valley Switching) conventional hard-switched converter with a fixed
switching frequency. The FSQ-series is an integrated
High-Efficiency through Minimum Voltage Switching
Pulse-Width Modulation (PWM) controller and
Narrow Frequency Variation Range over Wide Load
SenseFET specifically designed for quasi-resonant
and Input Voltage Variation
operation and Alternating Valley Switching (AVS). The
Advanced Burst-Mode Operation for Low Standby
PWM controller includes an integrated fixed-frequency
Power Consumption
oscillator, Under-Voltage Lockout (UVLO), Leading-
Simple Scheme for Sync Voltage Detection
Edge Blanking (LEB), optimized gate driver, internal soft-
Pulse-by-Pulse Current Limit
start, temperature-compensated precise current sources
Various Protection functions: Overload Protection
for a loop compensation, and self-protection circuitry.
(OLP), Over-Voltage Protection (OVP), Abnormal
Compared with a discrete MOSFET and PWM controller
Over-Current Protection (AOCP), Internal Thermal
solution, the FSQ-series can reduce total cost,
Shutdown (TSD) with Hysteresis, Output Short
Protection (OSP) component count, size, and weight; while simultaneously
increasing efficiency, productivity, and system reliability.
Under-Voltage Lockout (UVLO) with Hysteresis
This device provides a basic platform for cost-effective
Internal Start-up Circuit
designs of quasi-resonant switching flyback converters.
Internal High-Voltage Sense FET (650V)
Built-in Soft-Start (17.5ms)
Applications
Power Supply for LCD TV and Monitor, VCR, SVR,
STB, and DVD & DVD Recorder
Adapter
Related Resourses
Visit: FSQ0565R, FSQ0765R Green-Mode Farichild Power Switch (FPS) for Quasi-Resonant Operation
Ordering Information
(1)
Maximum Output Power
(2)
Operating Current R 230V 15% 85-265V Replaces
Product
(5)
DS(ON) AC AC
PKG.
Number Temp. Limit Max. Devices
Open Open
(3) (3)
Adapter Adapter
(4) (4)
Frame Frame
FSCM0565R
FSQ0565R TO-220F-6L -40 to +85C 3.0A 2.2 70W 80W 41W 60W
FSDM0565RB
FSCM0765R
FSQ0765R TO-220F-6L -40 to +85C 3.5A 1.6 80W 90W 48W 70W
FSDM0765RB
Notes:
1. The junction temperature can limit the maximum output power.
2. 230V or 100/115V with doubler.
AC AC
3. Typical continuous power in a non-ventilated enclosed adapter measured at 50C ambient temperature.
4. Maximum practical continuous power in an open-frame design at 50C ambient.
5. These parts are RoHS compliant.
2008 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ0565R, FSQ0765R Rev. 1.0.1 2