Q: DCI used as current limiters?

Aug 17, 2004 1 Replies

First reply

Austin Lesea

Gordon, Sure, this will work. Just remember that the power is then dissipated internally in the IO transistors. Austin

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G

All,



Conscious original intent of DCI: Our application involves driving 76 discrete LEDs using a XC3S50. For cost reasons, we've decided to drive each LED statically (as opposed to scanning). Each IO is operating at LVDCI_33.



Can we use DCI to current limit (~430 ohm) the LEDs? It looks like LVDCI_33 is driver impedance controlled only, so the 3S50 will be a current source. VCCO is 3.3V.



Any comments / experience is appreciated.



Gordon


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A

Gordon,

Sure, this will work.

Just remember that the power is then dissipated internally in the IO transistors.

Aust> All,

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