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NCP1215 - Low Cost Variable OFF Time Switched Mode Power Supply Controller

General Description

TSOP 6 4 3 1 2 6 5 7 8 SOIC

8 1 2 3 4 5 6 7 8 Symbol FB Description The FB pin provides voltage feedback loop.

The current injected into the pin determines the primary switch OFF time interval.

It also influences the peak value of the primary current.

Key Features

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Datasheet Details

Part number NCP1215
Manufacturer ON
File Size 148.44 KB
Description Low Cost Variable OFF Time Switched Mode Power Supply Controller
Datasheet download datasheet NCP1215 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.