PM8800

Device description and operation

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PM8800 can work with power either from PoE networks or from auxiliary sources - like AC

adapters -. Alternative sources are present in PoE appliances where devices can work also

outside the context of the PoE networks or to ensure normal operation even if PoE becomes

unavailable. PM8800 limits the number of external components to handle the coexistence of

both PoE and auxiliary supplies.

External sources can be connected so to exploit the in-rush current limitation provided by

the MOSFET or enabling the PWM section, bypassing the interface section.

A state-of-the-art current mode pulse with modulator is embedded in the PM8800 to support

low side single ended isolated and non isolated topologies. A high gain bandwidth product

error amplifier is embedded for non isolated configuration.

The PWM switching frequency of PM8800 is programmable with an appropriate resistor and

it is also capable of working with an external clock reference.