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ADV7182 Worst Case Power Consumption Issue

Question asked by wcgood on Apr 15, 2014
Latest reply on Apr 21, 2014 by GuenterL

Hi,

 

Just to confirm the rationale for having such large decoupling capacitance (220uF+33uF+...) on 3.3V and 1.8V rails? It seems that we are dealing with large dynamic currents. Is this correct? And if so, what are the dynamic currents we should expect for each rail (i.e. 1x single-ended CVBS / 1x differential-ended CVBS).

As attached is the worst case power consumption table of ADV7182.


Following this, I have decided to use the LDO NCV33375 (rated 300mA output current) for 1.8V rail. Can you confirm if the specified currents are still valid or is there any mistake in the provided figures?

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