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Replacment LNK6663K with LNK6773K

Posted by: elmasingen on

Is it possible to replace the LNK6663K with a LNK6773K without any problems?

コメント

Submitted by PI-Salt on 04/12/2021

Hi elmasingen,

You might want to check the datasheet for comprehensive comparison of the 2:
https://ac-dc.power.com/sites/default/files/product-docs/linkswitch-hp_family_datasheet.pdf

But generally:

similarities:
- they have the same package: eSOP-12B
- same switching frequency = 132 kHz,typ
- same max duty cycle = 64%
- same I_limit = 0.77A,typ

differences:
- they have different BV_dss:
LNK6663K BV_dss = 650V
LNK6773K BV_dss = 725V
- different Multi-Cycle Modulation Max Off-Time
LNK6663K T_MCM(off) = 0.5 ms
LNK6773K T_MCM(off) = 4 ms

the only key difference between the 2 IC is the breakdown voltage. You might want to consider which is appropriate for your specific application.

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