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/Title (NCP1288 - Controller, Fixed Frequency, Current Mode, for Flyback Converters)
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BroadVision, Inc.
2020-09-16T14:18:46+02:00
2011-07-05T09:34:12-07:00
2020-09-16T14:18:46+02:00
application/pdf
NCP1288 - Controller, Fixed Frequency, Current Mode, for Flyback Converters
ON Semiconductor
The NCP1288 is a new generation of the NCP12xx fixed−frequency
current−mode controllers featuring a high−voltage startup current,
pin−to−pin compatible with the previous generation.
Due to its proprietary Soft−Skip™ mode combined with frequency
foldback, the controller exhibits excellent efficiency in light load
condition while still achieving very low standby power consumption.
This Soft−Skip feature also dramatically reduces the risk of acoustic
noise, which enables the use of inexpensive transformers and
capacitors in the clamping network.
Internal frequency jittering, ramp compensation, and a versatile
latch input make this controller an excellent candidate for converters
where ruggedness and components cost are the key constraints.
In addition, the controller includes a new high voltage circuitry that
combines a startup current source and a brown−out / line OVP detector
able to sense the input voltage either from the rectified ac line or the dc
filtered bulk voltage.
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