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NCP1215

Part Number	NCP1215
Manufacturer	ON
Description	Low Cost Variable OFF Time Switched Mode Power Supply Controller
Published	May 12, 2005
Detailed Description	NCP1215 Product Preview Low Cost Variable OFF Time Switched Mode Power Supply Controller The NCP1215 is a controller for...
Datasheet	NCP1215 PDF File

Overview

NCP1215 Product Preview Low Cost Variable OFF Time Switched Mode Power Supply Controller The NCP1215 is a controller for low power off−line flyback Switchemode Power Supplies (SMPS) featuring low size, weight and cost constraints together with a good low standby power performance.
The operating principle uses switching frequency reduction at light load by increasing the OFF Time.
Also, when OFF Time expands, the peak current is gradually reduced down to approximately 1/4 of the maximum peak current to prevent from exciting the transformer mechanical resonances.
The risk of acoustic noise is thus greatly diminished while keeping good standby power performance.
A low power internal supply bloc...

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