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NCP1308

Part Number	NCP1308
Manufacturer	ON Semiconductor
Description	PWM Current Mode Controller
Published	Nov 1, 2006
Detailed Description	NCP1308 PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation The NCP1308 combines a true current mode ...
Datasheet	NCP1308 PDF File

Overview

NCP1308 PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation The NCP1308 combines a true current mode modulator and a demagnetization detector to ensure full borderline/Critical Conduction Mode in any load/line conditions and minimum drain voltage switching (Quasi-Resonant operation).
Due to its inherent skip cycle capability, the controller enters burst mode as soon as the power demand falls below a predetermined level.
As this happens at low peak current, no audible noise can be heard.
An internal 10 ms timer prevents the free-run frequency to exceed a high frequency (therefore below the 150 kHz CISPR-22 EMI starting limit), while the skip adjustment capability lets the u...

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