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LTC4271 Datasheet(PDF) 12 Page - Analog Devices

Part # LTC4271
Description  8/16-Port IEEE 802.3at PoE PSE Controller with Power Management and LED Control
PDF  30 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC4271 Datasheet(HTML) 12 Page - Analog Devices

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LTC9101-3/LTC9103
12
Rev. 0
For more information www.analog.com
TEST TIMING DIAGRAMS
VPORTn
VOC
VEE
tDET
tME
tMEL
VMARK
VCLASS
15.5V
20.5V
tCLE
tCLE
tCLEON
PD
CONNECTED
0V
91013 F01
FORCED-CURRENT
CLASSIFICATION
tPON
FORCED-
VOLTAGE
VLIM
VCUT
0V
GATEn
VSENSEn TO VSSKn
tSTART, tLIM
ICUT
0A
GATEn
PORT CURRENT
(a) CURRENT LIMIT TIMING
(b) CURRENT CUTOFF TIMING
91013 F02
tCUT
VHOLD
VSENSEn
TO VSSKn
GATEn
tDIS
tMPS
91013 F03
SCL
SDA
t1
t2
t3
tr
tf
t5
t6
t7
t8
t4
91013 F04
Figure 1. Detect, Class and Turn-On Timing
Figure 2. Current Timings
Figure 3. DC Disconnect Timing
Figure 4. I2C Interface Timing



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