PD69108F Просмотр технического описания (PDF) - Microsemi Corporation
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PD69108F Datasheet PDF : 17 Pages
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PD69108/F
TM
®
8 PORTS PSE POE MANAGER
DATASHEET
Dynamic Characteristics
The PD69108 utilizes three current level thresholds (Imin, Icut, Ilim) and three timers (Tmin, Tcut, Tlim).
Loads that consume Ilim current for more than Tlim are classified as being in 'short circuit state' and are shutdown.
Loads that dissipate more than Icut for longer than Tcut are classified as ‘overloads’ and are automatically shutdown.
If output power is below Imin for more than Tmin, the PD is classified as ‘no-load’ and is shutdown.
Automatic recovery from over-load condition is attempted every TOVLREC periods (typically 1 second). Output power is
limited to Ilim, which is a maximum peak current allowed at the port.
IEEE802.3 AF Mode Parameters
PARAMETER
Automatic recovery from no-
load shutdown
Cutoff timers accuracy
Inrush current
Output current operating range
Output power available
operating range
Off mode current
PD power maintenance
request drop-out time limit
Over-load current detection
range
Over load time limit
Turn on rise time
Turn off time
Time maintain power signature
CONDITIONS
TUDLREC value, measured from port shutdown
point (can be modified through control port)
Typical accuracy of Tcut
IInrsh
Iport
Pport
Imin1
Imin2
TPMDO
For t = 50 ms, Cload= 180 uF max.
Continuous operation after startup
period.
Continuous operation after startup
period, at port output.
Must disconnect for T greater than
TUVL
May or may not disconnect where
T is greater than TUVL
Buffer period to handle transitions
Icut
Time limited to TOVL
TOVL
Trise
Toff
TMPS
From 10% to 90% of Vport
(Specified for PD load consisting of 100 uF
capacitor in parallel to 200 Ω).
From Vport to 2.8 VDC
DC modulation time for DC
disconnect
MIN.
400
10
0.57
0
5
300
350
50
15
TYP. MAX.
1
2
450
350
15.4
5
7.5
10
400
400
75
500
49
UNIT
Sec
ms
mA
mA
W
mA
mA
ms
mA
ms
us
ms
ms
Copyright © 2013
Microsemi
5
Rev. 1.6
Analog Mixed Signal Group
1 Enterprise, Aliso Viejo, CA 92656, USA; Within the USA: (800) 713-4113, Outside the USA: (949) 221-7100 Fax: (949) 756-0308
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