DP83869HM: 1000M media converter

athur hsu

Part Number: DP83869HM

Hi Sir

In your datasheet describe the power consumption of 1000M media converter is about 495mW.

But in my PCBA it is about 1.2W (without SFP module/MCU...), do I need to do any register setting?

0 Ross Pimentel over 6 years ago

Hi Athur,

The values in the DS are typical values. Are you driving LEDs, operating at high temp, operating with high supply voltage?

Are you driving high loads on any of the IO lines? Using external pull resistors?

All of those can contribute to higher leakage.

0 athur hsu over 6 years ago in reply to Ross Pimentel

Hi Sir

Room Temperature: 25 degree C

VDDIO: 2v5

VDD1P0: 1v2

VDDA2P5: 2v5

VDDA1P8: internal power suppoly

LED: only uses LED2

Media conversion: 1000Mbps

That is all, but the power consumption still keep on 1.2W.

Is it normal?

0 Ross Pimentel over 6 years ago in reply to athur hsu

Please send the schematic.

When you power the PHY down into IEEE power down mode, what is the power at?

0 athur hsu over 6 years ago in reply to Ross Pimentel

Running into IEEE power down mode the power is about 0mW.

0 Ross Pimentel over 6 years ago in reply to athur hsu

Hi Athur,

Thank you for the data point and the schematic.

Please probe all the bootstrap resistors to see if the values are what you expect.

Also, please probe the LED network to see if you have a short and also probe RBIAS.

Can you confirm that FB2 is not stuffed when doing the measurements?

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