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LT4295 Datasheet(PDF) 5 Page - Analog Devices

Part # LT4295
Description  48-Port IEEE 802.3bt PoE PSE Controller
PDF  50 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT4295 Datasheet(HTML) 5 Page - Analog Devices

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LTC9101-1/
LTC9102/LTC9103
5
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. AGND – VEE = 55V and VDD – DGND = 3.3V unless otherwise noted.
(Notes 3 and 4)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Voltage Sense
VPG
Power Good Threshold Voltage
OUTn – VEE
l
2
2.4
2.8
V
OUT Pin Pull-Up Resistance to AGND
Port On
Port Off
l
300
2500
500
700
kΩ
kΩ
Current Sense
VLIM-2P
Active Current Limit,
Single-Signature PD
OUTn – VEE < 10V
Class 1 – Class 3
Class 4 – Class 6
Class 7
Class 8
l
l
l
l
40
80
100
110
42.5
85
106
117
45
90
112
124
mV
mV
mV
mV
Active Current Limit,
Dual-Signature PD
OUTn – VEE < 10V
Class 1 – Class 3
Class 4
Class 5
l
l
l
40
80
110
42.5
85
117
45
90
124
mV
mV
mV
VINRUSH-2P
Active Current Limit, Inrush
OUTn – VEE < 30V (Note 16)
Single-Signature, Class 1–4, 4-Pair Power
All Others
l
l
20
40
21.3
42.5
22.5
45
mV
mV
VHOLD-2P
DC Disconnect Sense Voltage
SENSEn – VSSKn
Single-Signature Class 1–4, 4-Pair Power
Single-Signature Class 1–4, 2-Pair Power
Single-Signature Class 5–8, 4-Pair Power
Dual Signature, 2-Pair or 4-Pair Power
l
l
l
l
200
500
200
200
350
700
350
350
500
900
700
700
µV
µV
µV
µV
VSC
Short-Circuit Sense
SENSEn – VSSKn – VLIM-2P
60
mV
Port Current Readback (See Typical Performance Characteristics, Note 17)
Full-Scale Range
(Notes 7, 15)
204.6
mV
LSB Weight
|SENSEn – VSSKn|, VSSKn = VEE (Note 15)
24.98
μV/LSB
Conversion Period
1.967
ms
VEE Readback (See Typical Performance Characteristics, Note 17)
Full-Scale Range
(Note 7)
82
V
LSB Weight
|AGND – VEE|
10.01
mV/LSB
Conversion Period
1.967
ms
Digital Interface
VILD
Digital Input Low Voltage
ADn, RESET, MSD, CFGn, AUTO, 4PVALID (Note 6) l
0.8
V
I2C Input Low Voltage
SCL, SDAIN (Note 6)
l
1
V
VIHD
Digital Input High Voltage
(Note 6)
l
2.2
V
Digital Output Low Voltage
ISDAOUT = 3mA, IINT = 3mA
ISDAOUT = 5mA, IINT = 5mA
l
l
0.4
0.7
V
V
Internal Pull-Up to VDD
ADn, RESET, MSD, CFG2
50
kΩ
Internal Pull-Down to DGND
AUTO, 4PVALID, CFG0
50
kΩ
EXT3 Pull-Down to VEE
50
kΩ
IDn Internal Pull-Up to CAP4
IDn = 0V
5
μA



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