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/Author (ON Semiconductor)
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/Title (NCL30085 - Power Factor Corrected Quasi-Resonant Primary Side Current Mode Controller for LED Lighting with Line Step Dimming and Thermal Foldback)
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BroadVision, Inc.
2020-10-19T13:47:36+02:00
2015-04-17T10:11:40-07:00
2020-10-19T13:47:36+02:00
application/pdf
NCL30085 - Power Factor Corrected Quasi-Resonant Primary Side Current Mode Controller for LED Lighting with Line Step Dimming and Thermal Foldback
ON Semiconductor
The NCL30085 is a power factor corrected flyback controller
targeting isolated and non−isolated constant current LED drivers. The
controller operates in a quasi−resonant mode to provide optimal
efficiency. Thanks to a novel control method, the device is able to
tightly regulate a constant LED current from the primary side. This
removes the need for secondary side feedback circuitry, biasing and an
optocoupler.
The device is highly integrated with a minimum number of external
components. A robust suite of safety protection is built in to simplify
the design. This device is specifically intended for very compact,
space efficient designs and supports 3 levels of log step dimming
which allows light output reduction by toggling the main AC switch
on and off to signal the controller to reduce the LED current point
down to 5% of full load.
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