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
LTC4270
Production
The LTC4270/LTC4271 chipset is a 12-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) compliant...
Datasheet
LTC4270 on Analog.com
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
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.
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.
The question was what are the current levels that are automatically set.
I contacted support directly and the answer I received was
"For LTPoE++ 90W; Icut = 2325mA and Ilim = 2338mA. These are typical values; the PD should only draw 2200mA,max."