Copyright © 2013 Microsemi
Rev. 1.7, 17-July-2013 Analog Mixed Signal Group
1 Enterprise, Aliso Viejo, CA 92656, USA; Phone (USA): (800) 713-4113, (ROW): (949) 221-7100 Fax: (949) 756-0308
1 Port PSE PoE PD69101 Controller
Dynamic Characteristics
The PD69101 utilizes three current level thresholds (I
min
, I
cut
, I
lim
) and three timers (T
min
, T
cut
, T
lim
).
Loads that consume I
lim
current for more than T
lim
are labeled as 'short circuit state' and shutdown.
Loads that dissipate more than I
cut
for longer than T
cut
are labeled as ‘overloads’ and are shutdown.
If output power is below I
min
for more than T
min
, the PD is labeled as ‘no-load’ and is shutdown.
Automatic recovery from over-load and no-load conditions is attempted every
T
OVLREC
periods (typically 1 second).
Output power is limited to I
lim,
which is a maximum peak current allowed at the port.
Table 1: IEEE802.3 AF Mode Parameters
Automatic Recovery from No-
load Shutdown
T
UDLREC
value, measured from port shutdown
point (can be modified through control port)
Typical accuracy of T
cut
For t=50 ms, C
load
=180 uF max.
Output Current Operating
Range
Continuous operation after startup
period.
Output Power Available
Operating Range
Continuous operation after startup
period, at port output.
Must disconnect for T greater than
T
UVL
May or may not disconnect where
T is greater than T
UVL
PD Power Maintenance
Request Drop-out Time Limit
Buffer period to handle transitions
Over-load Current Detection
Range
From 10% to 90% of V
port
(Specified for PD load consisting of 100 uF
capacitor in parallel to 200 ).
Time Maintain Power
Signature
DC modulation time for DC
disconnect
