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Questions of ADP1047 testing

Question asked by brent.chang@wpi-group.com on Aug 26, 2015
Latest reply on Sep 3, 2015 by LtCommData

Hi

 

Now is testing ADP1047 EVB and its output connect to a DC to DC power board. I have two issues need your support


1. During the testing, sometimes the ADP1047's inductor current works strange when power on in full load condition. (Seems PFC function doesn't work)

       (Correct waveform)                                                      (Incorrect waveform)

擷取.JPG


2. Pgood signal assert issue : The Pgood signal always on when the output voltage reaches 360V.  (Vout set to 380V; Vin_on set to 86V). Why PGood signal not assert when Vout ramp to 380V?

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