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FSCQ_06 Datasheet, PDF (1/45 Pages) Fairchild Semiconductor – Green Mode Fairchild Power Switch (FPS™) | |||
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February 2006
FSCQ-Series
FSCQ0565RT/FSCQ0765RT/FSCQ0965RT/FSCQ1265RT/
FSCQ1465RT/FSCQ1565RT/FSCQ1565RP
Green Mode Fairchild Power Switch (FPSâ¢)
Features
â Optimized for Quasi-Resonant Converter (QRC)
â Advanced Burst-Mode Operation for under 1W
Standby Power Consumption
â Pulse-by-Pulse Current Limit
â Over Load Protection (OLP) â Auto Restart
â Over Voltage Protection (OVP) â Auto Restart
â Abnormal Over Current Protection (AOCP) â Latch
â Internal Thermal Shutdown (TSD) â Latch
â Under Voltage Lock Out (UVLO) with Hysteresis
â Low Startup Current (typical: 25µA)
â Internal High Voltage SenseFET
â Built-in Soft Start (20ms)
â Extended Quasi-Resonant Switching
Applications
â CTV
â Audio Ampliï¬er
Related Application Notes
â AN4146: Design Guidelines for Quasi-Resonant
Converters Using FSCQ-Series Fairchild Power
Switch.
â AN4140: Transformer Design Consideration for
Off-Line Flyback Converters Using Fairchild Power
Switch.
Description
A Quasi-Resonant Converter (QRC) typically shows
lower EMI and higher power conversion efï¬ciency com-
pared to conventional hard-switched converter with a
ï¬xed 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 speciï¬cally designed for quasi-
resonant off-line Switch Mode Power Supplies (SMPS)
with minimal external components. The PWM controller
includes an integrated ï¬xed frequency oscillator, under volt-
age lockout, leading edge blanking (LEB), optimized gate
driver, internal soft start, temperature-compensated pre-
cise 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 efï¬ciency, productivity, and sys-
tem reliability. These devices provide a basic platform that
is well suited for cost-effective designs of quasi-resonant
switching ï¬yback converters.
Ordering Information
Product Number
FSCQ0565RTYDTU
FSCQ0765RTYDTU
FSCQ0965RTYDTU
FSCQ1265RTYDTU
FSCQ1465RTYDTU
FSCQ1565RTYDTU
FSCQ1565RPVDTU
Package
TO-220F-5L (Forming)
TO-220F-5L (Forming)
TO-220F-5L (Forming)
TO-220F-5L (Forming)
TO-220F-5L( Forming)
TO-220F-5L (Forming)
TO-3PF-7L (Forming)
Marking Code
CQ0565RT
CQ0765RT
CQ0965RT
CQ1265RT
CQ1465RT
CQ1565RT
CQ1565RP
YDTU: Forming Type
VDTU: Forming Type
BVdss
650V
650V
650V
650V
650V
650V
650V
Rds(ON) Max.
2.2â¦
1.6â¦
1.2â¦
0.9â¦
0.8â¦
0.7â¦
0.7â¦
©2006 Fairchild Semiconductor Corporation
1
FSCQ-Series Rev. 1.1.2
www.fairchildsemi.com
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