Voltage monitoring for LNK-PL ICs

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Dear PI engineers,

How to detect line undervoltage (UV), overvoltage (OV) for a specific range (for Example: 90-260VAC) using LNK-PL family.

Thanks

Hi,

There is no available pin used in the detection of line input for LNK-PL.  The part is for dimming application so emploring the UV will not be practical.  The UUT will shutdown during dimming and may cause flicker.

If it is for non-dimming, implement some external solution.  Use zener, resistor and transistor to build a under and ov detection circuit.  

 

Regards,

PI-Jono

How to implement input overvoltage detiction circuit to shutdown the IC for 265VACin

Hi,

It is possible to implement an OV protection as shown in the attachement.  Pull high the FB pin above 2V to disable switching.

 

Regards,

PI-Jono

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Sample circuit10.28 KB