Other Parts Discussed in Thread: TPS2375EVM
We are using the TPS23880 in automatic mode and although it correctly classifies various PD loads we are getting the ports turning off before it reaches the appropriate limits, specifically for Class 1 and 2. This is tested using the TPS23880 on our own product, a TPS2375EVM as the load and with an electronic load on the output. Power was taken from the TPS23880 GUI. For Class 1 our eLoad reached 2.5W, with GUI displaying 3.7W at which point it cut off with a PCUT exceeded error. For Class 2 the eLoad was 5.5W and the GUI display was 6.83W. Error again was PCUT exceeded. For other classes the output power seemed to be just about ok, although cut off was very close to the limits in most cases.
I'm using latest available firmware and would have expected the results to err on the high side rather than the low side.