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/Title (NCP1611 - Enhanced, High Efficiency Power Factor Controller)
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Acrobat Distiller 10.0.0 (Windows)
BroadVision, Inc.
2020-08-25T11:23:51+02:00
2015-01-21T10:38:16-07:00
2020-08-25T11:23:51+02:00
application/pdf
NCP1611 - Enhanced, High Efficiency Power Factor Controller
ON Semiconductor
The NCP1611 is designed to drive PFC boost stages based on an
innovative Current Controlled Frequency Fold−back (CCFF)
method. In this mode, the circuit classically operates in Critical
conduction Mode (CrM) when the inductor current exceeds a
programmable value. When the current is below this preset level, the
NCP1611 linearly decays the frequency down to about 20 kHz when
the current is null. CCFF maximizes the efficiency at both nominal
and light load. In particular, the stand−by losses are reduced to a
minimum.
Like in FCCrM controllers, internal circuitry allows near−unity
power factor even when the switching frequency is reduced. Housed in
a SO−8 package, the circuit also incorporates the features necessary
for robust and compact PFC stages, with few external components.
uuid:d43cd508-deba-4766-bad5-1ac32ee10337
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