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PoE 3.3 V - 6 A PD converter based on the PM8803
IEEE802.3at-compliant, synchronous flyback controller
Features
IEEE 802.3at compliant PD interface
Works with power supplied from Ethernet
LAN cables or from local auxiliary sources
Line input voltage range: 40 V
DC
to 60 V
DC
Output voltage: 3.35 V
DC
± 5%
Output current: 6 A
Peak-to-peak output ripple: < 25 mV
Efficiency DC-DC full-load: > 90%
Overall peak efficiency: > 87%
Transient response ΔV
OUTPK-PK
to 50% load
step: < 250 mV
ΔV in load line case: < 0.5%
RoHs compliant
Description
The STEVAL-TSP009V2 is a reference design
for a PoE+, high-efficiency, 3.3 V - 6 A flyback
converter based on the PM8803 PoE controller.
The PM8803 is a highly integrated device
embedding an IEEE802.3at-compliant powered
device (PD) interface together with a PWM
controller and support for auxiliary sources.
The STEVAL-TSP009V2 reference design is
based on an isolated flyback topology CCM
converter featuring synchronous rectification with
gate driver transformer.
