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LTC4270 Current Limits in stand alone mode?

What are the current limits programmed in the LTC4720 using XIO0 and XIO1 when in stand alone mode?

I am mainly interested in the LTCPoE++ 90W mode

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  • In AUTO pin high mode, the XIO1/0 pins set the maximum LTPoE++ power level (38.7W, 52.7W, 70W, 90W) the LTC4270/LTC4271 will automatically power up.  See Table 1 of the datasheet.  In this mode, currents are automatically set to insure the PD receives its requested power with the PSE voltage for LTPoE++ and after a Cat5e Ethernet 100m cable.

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  • In AUTO pin high mode, the XIO1/0 pins set the maximum LTPoE++ power level (38.7W, 52.7W, 70W, 90W) the LTC4270/LTC4271 will automatically power up.  See Table 1 of the datasheet.  In this mode, currents are automatically set to insure the PD receives its requested power with the PSE voltage for LTPoE++ and after a Cat5e Ethernet 100m cable.

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