Data Sheet

© 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSQ0365, FSQ0265, FSQ0165, FSQ321 • Rev. 1.0.6 8
FSQ0365/0265/0165/321 — Green Mode Fairchild Power Switch (FPS™) for Valley Switching Converter
Comparison Between FSDM0x65RNB and FSQ-Series
Function FSDM0x65RNB FSQ-Series Advantages of FSQ-Series
Operation Method
Constant
Frequency PWM
Valley Switching
Operation
Improved efficiency by valley switching
Reduced EMI noise
EMI Reduction
Frequency
Modulation
Valley Switching &
Inherent Frequency
Modulation
Reduce EMI noise in two ways
Burst-Mode
Operation
Fixed Burst Peak
Advanced Burst-
Mode
Improved standby power by valley switching also in
burst-mode
Because the current peak during burst operation is
dependent on V
FB
, it is easier to solve audible
noise
Protection AOCP
Improved reliability through precise abnormal over-
current protection