Externally synchronizable DCDC controller

Dmitry Vasilenko - Arrow

Hi,

do you have any ideas how to create a power stage that is syncronizable from an external clock source, but if the ext clock disappears, the controller goes into disable mode.

The specs for the power stage are:

Vin: 24V

Vout: 5V, 1A max

over 11 years ago

0 JohnTucker over 11 years ago

TI__Guru**** 191445 points

Most of our controllers will revert to a default clock frequency in the absence of an external clock signal. You will probably need to sense the clock externally and when it goes away have that circuit control the EN pin of the controller.

0 Dmitry Vasilenko - Arrow over 11 years ago in reply to JohnTucker

Expert 1380 points

John, do you have a solution to sense the CLK signal that produces an EN signal?

0 JohnTucker over 11 years ago in reply to Dmitry Vasilenko - Arrow

TI__Guru**** 191445 points

I don't have anything specific. So far as I know you are the first person looking for that solution. I think it would not be too difficult. The details would depend on your clock source and the type of controller you want to interface to.

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Externally synchronizable DCDC controller