FSQ0565RQ Datasheet, PDF (8/23 Pages) Fairchild Semiconductor – Green-Mode Fairchild Power Switch (FPS) for Quasi-Resonant Operation - Low EMI and High Efficiency

Comparison Between FSDM0x65RNB and FSQ-Series
Function
FSDM0x65RE FSQ-Series
FSQ-Series Advantages
Operation Method
Constant
Frequency PWM
EMI Reduction
Frequency
Modulation
Quasi-Resonant
Operation
Reduced
EMI Noise
! Improved efficiency by valley switching
! Reduced EMI noise
! Reduced components to detect valley point
! Valley Switching
! Inherent Frequency Modulation
! Alternate Valley Switching
Hybrid Control
CCM or AVS
Based on Load ! Improves efficiency by introducing hybrid control
and Input Condition
Burst-Mode
Operation
Strong Protections
TSD
Burst-Mode
Operation
OLP, OVP
145°C without
Hysteresis
Advanced
Burst-Mode
Operation
OLP, OVP, OSP
140°C with 60°C
Hysteresis
! Improved standby power by advanced burst-mode
! Improved reliability through precise OSP
! Stable and reliable TSD operation
! Converter temperature range
Differences Between FSQ0565RS and FSQ0565RQ
Function
FSQ0565RS
FSQ0565RQ
Remark
! Lower current peak is suitable to reduce conduc-
tion loss
I_LIM
2.25A
3.0A
! Higher current peak is suitable for handling higher
power
Over Voltage
Protection
V_CC OVP
(triggered by V_CC
voltage)
Sync OVP
! Sync OVP is suitable when V_CC voltage is pre reg-
(triggered by Sync ^ulated.
voltage)
© 2008 Fairchild Semiconductor Corporation
FSQ0565RS/RQ Rev. 1.0.3
8
www.fairchildsemi.com