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Prop Package Power — Parallax Forums

Prop Package Power

HumanoidoHumanoido Posts: 5,770
edited 2010-03-19 20:04 in Propeller 1
The prop comes in three different packaging. In real world conditions, given all factors relatively the same, is there difference in current drawn by each? i.e. does the smaller package draw less current?

40-Pin DIP Chip
44-Pin QFN Chip
44-Pin QFP Chip

humanoido

Comments

  • BradCBradC Posts: 2,601
    edited 2010-03-19 06:19
    Why would it?

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    You only ever need two tools in life. If it moves and it shouldn't use Duct Tape. If it does not move and it should use WD40.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2010-03-19 06:32
    humanoido said...
    ...does the smaller package draw less current?
    Um, packages don't draw current; chips do. And it's the same chip in each package.

    -Phil
  • HumanoidoHumanoido Posts: 5,770
    edited 2010-03-19 06:47
    Good, so there are absolutely no differences in packaging, insulated qualities or dielectrics or permeabilities that influence the tiny component structures substrates in inside as related to infinitesimal power draw... I'm probably thinking too much again... but thinking about lowering the electron travel (fractional v-emf) where there are possible effects. Running more experiments.

    humanoido
  • BigFootBigFoot Posts: 259
    edited 2010-03-19 17:25
    There are no differences in the chips inside the packages but there
    is a big difference in the different packages inductance and capacitance.

    The dip chips are the worst because of the long lead frames inside them.
    The lead less chips are the best because of the short distance from the die
    to the board.

    Russ
  • PhilldapillPhilldapill Posts: 1,283
    edited 2010-03-19 18:25
    So, in reality, yes there is a small power consumption difference? I mean, if you are toggling pins at a fair clip, then those inductances and capacitances have to charge/discharge, consuming more power. Right?

    Or is this still negligible?
  • W9GFOW9GFO Posts: 4,010
    edited 2010-03-19 19:01
    Since they are different, they cannot be the same.

    I'll bet the difference is negligible, but who determines what negligible is?

    Rich H

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    The Simple Servo Tester, a kit from Gadget Gangster.
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2010-03-19 20:04
    Philldapill said...
    So, in reality, yes there is a small power consumption difference? I mean, if you are toggling pins at a fair clip, then those inductances and capacitances have to charge/discharge, consuming more power. Right?

    Or is this still negligible?

    I don't think that does consume power. Ideal caps/inductors don't consume power and I'm guessing you at least model them as ideal.

    Graham
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