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NCP1378

Part Number	NCP1378
Manufacturer	ON Semiconductor
Description	PWM Current-Mode Controller
Published	Nov 1, 2006
Detailed Description	NCP1378 PWM Current- Mode Controller for Free- Running Quasi- Resonant Operation The NCP1378 combines a true current mo...
Datasheet	NCP1378 PDF File

Overview

NCP1378 PWM Current- Mode Controller for Free- Running Quasi- Resonant Operation The NCP1378 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 8.
0 ms timer prevents the free- run frequency to exceed 100 kHz (therefore below the 150 kHz CISPR- 22 EMI starting limit), while the skip adjustment capability lets the use...

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