MIC2358_11 Datasheet, PDF (12/29 Pages) Micrel Semiconductor – IEEE 802.3af Octal Power Sourcing Equipment Controller

Micrel, Inc.
to predefine a maximum class to determine the power
level to be supplied to a detected PD. A PD
classification exceeding its maximum class will go to the
POWER_DENIED state.
With the ICO pin high during reset, classifications of all
ports are forced to class 0. This provides system
flexibility for Class 1 or Class 2 PD devices such as a
security camera that violate its class current often due to
many motor start-up occasions.
MIC2358YLQ
IEEE
802.3af
0
1
2
3
4
Classification
Current at PSE
0mA to 5mA
8mA to 13mA
16mA to 21mA
25mA to 31mA
35mA to 45mA
Maximum
PD Power
12.95W
3.84W
6.49W
12.95W
12.95W
Maximum PSE Output
Power Per Port
15.4W
4W
7W
15.4W
15.4W
Class Description
PD Does Not Implement Classification,
Unknown Power
Low Power PD
Medium Power PD
High or Full Power PD
Reserved, Power as Class 0
Table 1. IEEE 802.3af Powered Device Classes
July 2010
Detection Timing
12
M9999-070810