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takita
takita
Visitor II
February 8, 2012
Question

Power consumption ?I

  • February 8, 2012
  • 1 reply
  • 537 views
Posted on February 08, 2012 at 03:43

Hi,

Currently, I am designing an application board for STM32VLdiscovery with batteries. In order to decide the parameters of step-up converter, I would like to know the current consumption of STM32VLDiscovery, although the current consumption changes on each application.

Can anyone give me some advice, please?  

#power-consumption
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    1 reply

    donald2
    donald2
    Associate
    February 8, 2012
    Posted on February 08, 2012 at 23:51

    The datasheet breaks out the power usage for the core by clock rate, and for each peripheral.  This makes it very easy to estimate the power use for a specific implementation.

    But for a general purpose development board, there is an even easier estimation: almost all power will be drawn by external devices.  A single output pin can supply more power than the chip uses internally.  An inefficient power LED might draw more than the 10mA used by application code that does an occasional wfi() or wfe().

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