LNB Efficiency

[JAlex2]

Using the STEVAL-LNBH06 I am not able to achieve 93% efficiency as stated in the data sheet. Please advise why this might be.

inout voltage: 12V

load: 43ohm power resistor for each channel (draw 420mA per channel)

measured input power: 20.4W

output power: 17.2W

efficiency: 85%

[Issamos]

Hello @JAlex2

The 93% efficiency is for specific conditions that you can find them in the part 8 of the DS8975.

Best regards.

II

[JAlex2]

Are you referring to where it specifies Iout as 500mA? If so, I have already tried this condition on the evaluation board even with low power mode active, and only improved to 87%. Please advise what condition you are referring to if this is not it.