How to calculate Power Budget (consumption) of board ??

[0by1]

Hi all,

Please clarify my doubts about power budget calculation of board.

(1) total power = No. of devices x [ ( supply current x supply voltage) + ( leakage current x supply voltage) ] am I right ??:?:

(2) Whether I have to consider input/output current (Iol..Ioh..)???, specially in case of transceivers, buffers.

Thanks in advance.

 

[steinar96]

1) Generally, power drawn by a circuit equals the input voltage times the current it draws. Or equally it is the sum of the voltages multiplied by the currents of all the subcircuits/subdevices in the circuit