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FSQ0365RN Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # FSQ0365RN
Description  Green Mode Fairchild Power Switch (FPS?? for Valley Switching Converter
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FSQ0365RN Datasheet(HTML) 1 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
May 2007
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311 Rev. 1.0.4
FPSTM is a trademark of Fairchild Semiconductor Corporation.
FSQ0365, FSQ0265, FSQ0165, FSQ321, FSQ311
Green Mode Fairchild Power Switch (FPS™) for
Valley Switching Converter - Low EMI and High Efficiency
Features
Optimized for Valley Switching (VSC)
Low EMI through Variable Frequency Control and
Inherent Frequency Modulation
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
Pulse-by-Pulse Current Limit
Various Protection Functions: Overload Protection
(OLP), Over-Voltage Protection (OVP), Abnormal
Over-Current Protection (AOCP), Internal Thermal
Shutdown (TSD)
Under-Voltage Lockout (UVLO) with Hysteresis
Internal Start-up Circuit
Internal High-Voltage SenseFET (650V)
Built-in Soft-Start (15ms)
Applications
Power Supply for DVP Player and DVD Recorder,
Set-Top Box
Adapter
Auxiliary Power Supply for PC, LCD TV, and PDP TV
Related Application Notes
AN-4137, AN-4141, AN-4147, AN-4150 (Flyback)
AN-4134 (Forward)
Description
A Valley Switching Converter 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 valley switching
operation 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
loop compensation, and self-protection circuitry.
Compared with discrete MOSFET and PWM controller
solutions, the FSQ-series reduces 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 valley switching fly-back converters.


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