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FSDH321 Datasheet(PDF) 6 Page - Fairchild Semiconductor

Part No. FSDH321
Description  Green Mode Fairchild Power Switch (FPS TM)
Download  20 Pages
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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FSDH321 Datasheet(HTML) 6 Page - Fairchild Semiconductor

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FSDH321, FSDL321
6
Comparison Between FSDM311 and FSDx321
Function
FSDM311
FSDx321
FSDx321 Advantages
Soft-Start
15ms
15ms
(same for both devices)
• Gradually increasing current limit
during soft-start further reduces peak
current and voltage stresses
• Eliminates external components used
for soft-start in most applications
• Reduces or eliminates output
overshoot
External Current Limit
not applicable
Programmable of
default current limit
• Smaller transformer
• Allows power limiting (constant over-
load power)
• Allows use of larger device for lower
losses and higher efficiency.
Frequency Modulation
not applicable
±3.0KHz @100KHz
±1.5KHz @50KHz
• Reduces conducted EMI
Burst Mode Operation
Built into controller
Built into controller
(same for both devices)
• Improves light load efficiency
• Reduces power consumption at no-
load
• Transformer audible noise reduction
Drain Creepage at
Package
7.62mm
7.62mm
(same for both devices)
• Greater immunity to arcing provoked
by dust, debris and other contami-
nants


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