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LLC primary current sensing is essential?

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eem2am

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Hello,

We do isolated LLC LED Driver.

Vin = 400VDC (230VAC Mains PFC stage output voltage)

I(out) = LED current = 1Amp....this can be analog dimmed down to 100mA.

We do NOT have any primary current sensing whatsoever in the LLC primary side.

...Is this OK?

-Is it possible to do an LLC converter without any kind of primary overcurrent detection facility?
 
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No it is not reccommended, as, if you short the output large currents will flow in the mosfets and diodes, some sort of current limiting is reccommended, Regards, Orson Cart.
 
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