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LTC4292 Datasheet(PDF) 4 Page - Analog Devices

Part # LTC4292
Description  4-Port IEEE 802.3bt PoE PSE Controller
PDF  40 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC4292 Datasheet(HTML) 4 Page - Analog Devices

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LTC4291-1/LTC4292
4
Rev 0
For more information www.analog.com
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. AGNDP – VEE = 54V and VDD – DGND = 3.3V unless otherwise noted.
(Notes 3 and 4)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Classification
VCLASS
Classification Voltage
AGNDP – VOUTnM, 0mA ≤ IOUTnM ≤ 50mA
l
16.0
20.5
V
Classification Current Compliance
VOUTnM = AGNDP
l
53
61
67
mA
Classification Threshold Current
Class Signature 0 – 1
Class Signature 1 – 2
Class Signature 2 – 3
Class Signature 3 – 4
Class Signature 4 – Overcurrent
l
l
l
l
l
5.5
13.5
21.5
31.5
45.2
6.5
14.5
23
33
48
7.5
15.5
24.5
34.9
50.8
mA
mA
mA
mA
mA
VMARK
Classification Mark State Voltage
AGNDP – VOUTnM, 0.1mA ≤ ICLASS ≤ 5mA
l
7.5
9
10
V
Mark State Current Compliance
VOUTnM = AGNDP
l
53
61
67
mA
Gate Driver
GATE Pin Pull-Down Current
Port Off, VGATEnM = VEE + 5V
Port Off, VGATEnM = VEE + 1V
l
l
0.4
0.08
0.12
mA
mA
GATE Pin Fast Pull-Down Current
VGATEnM = VEE + 5V
30
mA
GATE Pin On Voltage
VGATEnM – VEE, IGATEnM = 1µA
l
8
12
14
V
Output Voltage Sense
VPG
Power Good Threshold Voltage
VOUTnM – VEE
l
2
2.4
2.8
V
OUT Pin Pull-Up Resistance to AGNDP
0V ≤ (AGNDP – VOUTnM) ≤ 5V
l
300
500
700
kΩ
Current Sense
VCUT-2P
Overcurrent Sense Voltage,
Single-Signature PD
VSENSEnM – VSSKn
Class 1, CUTn[6:0] = 45h
Class 2, CUTn[6:0] = 48h
Class 3, CUTn[6:0] = 52h
Class 4, CUTn[6:0] = 62h
Class 5, CUTn[6:0] = 5Fh
Class 6, CUTn[6:0] = 67h
Class 7, CUTn[6:0] = 6Ch
Class 8, CUTn[6:0] = 74h (Note 12)
l
l
l
l
l
l
l
l
13.5
21.6
47.5
92.0
84.0
105
119
140
14.1
22.5
50.5
96.0
87.0
110
124
146
14.6
23.4
53.5
100.0
91.0
114
129
152
mV
mV
mV
mV
mV
mV
mV
mV
Overcurrent Sense Voltage,
Dual-Signature PD
VSENSEnM – VSSKn
Class 1, CUTn[6:0] = 45h
Class 2, CUTn[6:0] = 48h
Class 3, CUTn[6:0] = 52h
Class 4, CUTn[6:0] = 62h
Class 5, CUTn[6:0] = 74h (Note 12)
l
l
l
l
l
13.5
21.6
47.5
92.0
140
14.1
22.5
50.5
96.0
146
14.6
23.4
53.5
100.0
152
mV
mV
mV
mV
mV
VLIM-2P
Active Current Limit,
Single-Signature PD
VOUTnM – VEE < 10V
Class 1 – Class 3, LIMn = 80h
Class 4 – Class 6, LIMn = C0h
Class 7, LIMn = D0h
Class 8, LIMn = E9h (Note 12)
l
l
l
l
61.2
122
153
168
63.6
128
159
175
67.3
135
169
185
mV
mV
mV
mV
Active Current Limit,
Dual-Signature PD
VOUTnM – VEE < 10V
Class 1 – Class 3, LIMn = 80h
Class 4, LIMn = C0h
Class 5, LIMn = E9h (Note 12)
l
l
l
61.2
122
168
63.6
128
175
67.3
135
185
mV
mV
mV
VINRUSH-2P
Active Current Limit, Inrush
AGNDP – VOUTnM > 30V (Note 17)
LIMn = 80h
LIMn = 08h
l
l
61.2
30.6
63.6
31.8
67.3
33.7
mV
mV
VHOLD-2P
DC Disconnect Sense Voltage
VSENSEnM – VSSKn
CUTn[7] (Dis) Bit = 0
CUTn[7] (Dis) Bit = 1 (Note 12)
l
l
0.31
0.76
0.53
1.13
0.74
1.49
mV
mV



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