TPS22810: CT Pin.

RuggedEngie

Intellectual 375 points

Part Number: TPS22810

If we want to use the "default" settings, where CT = 0pF. Would we connect the CT pin to ground or leave open?

Otherwise, what would happen shorting this pin to ground?

Thanks,
Mark

over 7 years ago

0 Aleksandras_Kaknevicius over 7 years ago

TI__Genius 15760 points

Hi Mark,

In this case, you would want to leave the CT pin floating. This pin directly affects the gate voltage of the FET, so grounding it may prevent the pass FET from being able to turn on.

Thanks,

Alek Kaknevicius

0 RuggedEngie over 7 years ago in reply to Aleksandras_Kaknevicius

Intellectual 375 points

Thanks Alek!

0 RuggedEngie over 7 years ago in reply to Aleksandras_Kaknevicius

Intellectual 375 points

Hi Alek,

This does make me wonder. Would leaving the pin open, act like infinite capacitance? Creating an infinite rise time?

Mark

0 Aleksandras_Kaknevicius over 7 years ago in reply to RuggedEngie

TI__Genius 15760 points

Hi Mark,

Good question. Actually this would be a very small capacitance because the gate capacitance of the FET would be the only capacitance on that node.

Thanks,

Alek Kaknevicius

0 RuggedEngie over 7 years ago in reply to Aleksandras_Kaknevicius

Intellectual 375 points

Got it; thanks again!

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TPS22810: CT Pin.