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Old 10-26-2010 | 02:41 PM
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Philip Cooper
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From: HoddesdonHerts, UNITED KINGDOM
Default RE: Temp loss of control

ORIGINAL: Moerig


RF Noise from sources like electric motors and static buildup.

From the Device Datasheet:

Datasheet Document #: 38-16015 Rev. *I on page 23 refers to L/D pin recommendation changed to :
"PMU inductor/diode connection, when used. If not used, connect to GND.

From Cypress technical support:
If the L/D pin is left floating, the switching regulator inside the PMU will pick up noise which will in turn increase the radio noise and the noise on the board.

PMU refers to Power Management Unit. It is a feature to prevent brownouts. Spektrum did not implement this feature and this pin was left unconnected.
This is a cut and dried technical issue confirmed by die chip vendor. Not debatable, sorry
Increase the radio noise and noise on the board - How much? 1/100000 above normal levels or enough to actually be a problem? Is this actually a serious problem or a recommendation? What is Spektrums response to this?
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