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current consumptions of PA6C sensibly higher than those of Gmm-u2p or SL3C

Started by Horsa, August 18, 2011, 11:29:22 AM

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Horsa

August 18, 2011, 11:29:22 AM Last Edit: August 18, 2011, 11:32:13 AM by Horsa
Q: why do the current consumptions of GlobalTop FGPMMOPA6C (PA6C) are sensibly higher than those of GlobalTop Gmm-u2p and GlobalTop SL3C modules?

All the following GlobalTop Technology GPS receivers

  • GlobalTop Gmm-u2p
  • GlobalTop SL3C
  • GlobalTop FGPMMOPA6C (PA6C)

are based on the same MediaTek MT3329 chip. From the following table though





modeGmm-u2pSL3CPA6C
acquisition (mA)191925
tracking (mA)151520

it is clear that the current consumptions of GlobalTop FGPMMOPA6C (PA6C) are sensibly higher than those of GlobalTop Gmm-u2p and GlobalTop SL3C modules. As GlobalTop FGPMMOPA6C (PA6C) has a passive internal GPS patch antenna (patch-on-top), the reason for a higher current consumption is the internal power supply distribution architecture:


  • GlobalTop Gmm-u2p: switching regulator
  • GlobalTop SL3C: switching regulator
  • GlobalTop FGPMMOPA6C (PA6C): linear regulator
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