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NCP1207B

Part Number	NCP1207B
Manufacturer	ON Semiconductor
Description	PWM Controller
Published	Mar 31, 2016
Detailed Description	DATA SHEET www.onsemi.com PWM Current-Mode Controller for Free Running Quasi-Resonant Operation NCP1207A, NCP1207B The ...
Datasheet	NCP1207B PDF File

Overview

DATA SHEET www.
onsemi.
com PWM Current-Mode Controller for Free Running Quasi-Resonant Operation NCP1207A, NCP1207B The NCP1207A/B 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.
For the NCP1207A, an internal 8.
0 ms timer prevents the free−run frequency to exceed 125 kHz (therefore below the 150 kHz CISPR−22 EMI starting limit...

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