SI3461 Silicon Laboratories, SI3461 Datasheet - Page 10

• Manufacturer Part Number: SI3461
• Description: SINGLE-PORT IEEE 802.3AT POE/POE PSE INTERFACE
• Manufacturer: Silicon Laboratories

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Si3461
3. Typical Si3461-EVB Waveforms
Note: Voltages are negative going with respect to the positive input.
10
Ch1: PoE output voltage referenced to the +50V rail
Ch1: PoE output voltage referenced to the +50V rail
PoE+ Current Limit Response
Classification and Power-up
Powering a PoE+ Device
Detection
PoE+
t
LIM
Detection
Delay PoE+
Two event classification
Mark Pulse
Classification
t
CLASS_CYCLE
t
PWRUP
Power-on
Figure 2. Typical Si3461-EVB Waveforms
Ch1: PoE output voltage referenced to the +50V rail
Ch1: PoE output voltage referenced to the +50V rail
PoE Current Limit Response
Classification and Power-up
Powering a PoE Device
Detection
Detection
Delay PoE
Rev. 1.0
Classification
t
PoE
LIM
t
Classification
CLASS_CYCLE
t
PWRUP
Power-on
Ch1: PoE output voltage referenced to the +50V rail
Overload During Classification
Midspan Backoff after bad
Classification result
Detection Time
g
t
BOM
T
DETECT
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