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LTC4271 Datasheet(PDF) 7 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) 7 Page - Analog Devices

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LTC9101-3/LTC9103
7
Rev. 0
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
802.3af Power On Sequence
802.3at Power On Sequence
Inrush Current Limit (Note 14)
Power-On Current Limits
ILIM vs Temperature
Classification Current Compliance
Port Current Measurement
Port Current Measurement
vs Temperature
VEE Measurement
FORCED CURRENT
DETECTION
VEE = –55V
CLASS 3 PD
VEE
50ms/DIV
–60
–10
–20
–30
–40
–50
0
91013 G01
FORCED VOLTAGE
DETECTION
802.3af
CLASSIFICATION
POWER ON
AGND
(RSENSE = 0.1Ω unless otherwise specified.)
FORCED CURRENT
DETECTION
VEE = –55V
CLASS 4 PD
VEE
50ms/DIV
–60
–10
–20
–30
–40
–50
0
91013 G02
FORCED VOLTAGE
DETECTION
802.3at
CLASSIFICATION
POWER ON
AGND
OUTn – VEE (V)
0
11
22
33
44
55
0
20
40
60
80
100
120
0
200
400
600
800
1000
1200
91013 G03
AGND – VEE = 55V
CLASS 0–3
CLASS 4
OUTn – VEE (V)
0
11
22
33
44
55
0
20
40
60
80
100
120
0
200
400
600
800
1000
1200
91013 G04
AGND – VEE = 55V
OUTn = VEE
TA (°C)
–40 –20
0
20
40
60
80
100
40
41
42
43
44
45
400
410
420
430
440
450
91013 G05
CLASSIFICATION CURRENT (mA)
SENSEn – VSSKn (mV)
0
0
20
2
4
6
40
60
80
8
100(mA)
10(mV)
–20
–16
–12
–8
–4
0
91013 G06
N = 4488
µ = 89.610
σ = 0.252
SENSEn – VSSKn = 89.6mV
24.98µV/LSB
MEASUREMENT (mV)
88.1
88.6
89.1
89.6
90.1
90.6
91.1
0
100
200
300
400
500
600
700
91013 G07
SENSEn – VSSKn = 100mV
24.98µV/LSB
TA (°C)
–40 –20
0
20
40
60
80
100
99.6
99.8
100.0
100.2
100.4
100.6
100.8
91013 G08
N = 364
µ = 54.998
σ = 0.058
AGND – VEE = 55V
10.01mV/LSB
MEASUREMENT (V)
54.7
54.8
54.9
55.0
55.1
55.2
55.3
0
5
10
15
20
25
30
91013 G09



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