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SI3459 Datasheet(PDF) 6 Page - Silicon Laboratories

No. de pieza SI3459
Descripción Electrónicos  OCTAL IEEE 802.3AT POE PSE CONTROLLER
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Fabricante Electrónico  SILABS [Silicon Laboratories]
Página de inicio  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI3459 Datasheet(HTML) 6 Page - Silicon Laboratories

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Si3459
6
Rev. 1.1
Classification Mark Specifications
Mark Voltage
VMARK
IPORT = 0 mA
–10
V
IPORT =5 mA
–7
V
Output Voltage Sense
Threshold Voltage
for Power Good Sense
VPGOOD
Measured at VDRAINn to AGND
1
3
V
Bias Current of DRAINn Pin
IDRAINn
VDRAINn =0V
–25
µA
Current Sense
Sense resistor value
RSENSE
1% tolerance
0.2475
0.25
0.2525
Sense Voltage
at Current Limit
VILIM
VSENSEn–VKSENSEn
1x Power Mode
100
106.25
112.5
mV
VSENSEn–VKSENSEn
2x Power Mode
200
212.5
225
mV
DC Disconnect
Sense Voltage
VDC_MIN
VSENSEn – VKSENSEn
1.25
1.875
2.5
mV
SENSEn Pin Bias
Current
ISENSE
VSENSEn – AGND
–1
µA
MOSFET Gate Drive
Drive Current
from GATEn Pin (Active)
GATEn pin active
VGATEn =AGND
1x Power Mode
–60
–40
–20
µA
Drive Current
from GATEn Pin (Off)
GATEn pin shut off
VGATEn =AGND + 5 V
—50
mA
Voltage Difference Between
any GATEn and AGND Pin
IGATEn =–1 µA
10.5
12
13
V
Table 1. PSE Port Interface Recommended Operating Conditions1 (Continued)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Notes:
1. Port voltages are referenced with respect to VPWR. All other voltages are referenced with respect to GND. These
specifications apply over the recommended operating voltage and temperature ranges of the device unless noted
otherwise. Typical performance is for TA =25°C, VDD =AGND + 3.3 V, AGND and DGND = 0 V, and VPWR at 48 V.
2. For a description of the detailed behavior of VDD UVLO, see “4.2.2. Global Event Register and Global Event COR
(0x02, 0x03)” .
3. Positive values indicate currents flowing into the device; negative currents indicate current flowing out of the device.


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