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LTC4263 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC4263
Description  12-Port PoE/PoE/LTPoE PSE Controller
PDF  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4263 Datasheet(HTML) 8 Page - Linear Technology

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LTC4270/LTC4271
8
42701f
Classification Transient Response
to 40mA Load Step
TYPICAL PERFORMANCE CHARACTERISTICS
Powering Up into a 180μF Load
Classification Current Compliance
VDD Supply Current vs Voltage
VEE Supply Current vs Voltage
802.3af Power On Sequence in
AUTO Pin Mode
802.3at Power On Sequence in
AUTO Pin Mode
Power On Sequence with 10VPP
60Hz Noise
FORCED CURRENT
DETECTION
VEE = –55V
CLASS 3 PD
VEE
50ms/DIV
–60
–10
–20
–30
–40
–50
0
42701 G01
FORCED VOLTAGE
DETECTION
802.3af
CLASSIFICATION
POWER ON
AGND
FORCED CURRENT
DETECTION
VEE = –55V
CLASS 4 PD
VEE
50ms/DIV
–60
–10
–20
–30
–40
–50
0
42701 G02
FORCED VOLTAGE
DETECTION
802.3at
CLASSIFICATION
POWER ON
AGND
AGND
50ms/DIV
–25
0
–5
–10
–15
–20
5
42701 G03
FORCED VOLTAGE
DETECTION
802.3af
CLASSIFICATION
POWER ON
PORT OFF
FORCED CURRENT
DETECTION
NORMAL DETECT
DETECT WITH 60Hz NOISE
5ms/DIV
42701 G04
FET ON
FOLDBACK
VEE = –54V
AGND
VEE
VEE
0mA
PORT VOLTAGE
20V/DIV
PORT CURRENT
200mA/DIV
GATE VOLTAGE
10V/DIV
425mA
CURRENT LIMIT
LOAD FULLY CHARGED
CLASSIFICATION CURRENT (mA)
42701 G06
020
10
30
40
50
60
70
0
–2
–4
–6
–8
–10
–12
–14
–16
–18
–20
50μs/DIV
40mA
0mA
42701 G05
–20V
PORT
VOLTAGE
1V/DIV
PORT
CURRENT
20mA/DIV
VDD = 3.3V
VEE = –54V
VDD SUPPLY VOLTAGE (V)
42701 G07
2.7
2.9
2.8
3.0 3.1 3.2 3.3 3.4
3.6
3.5
15.0
12.0
9.0
6.0
3.0
0.0
–40
25°C
85°C
VEE SUPPLY VOLTAGE (V)
42701 G08
–60
–50
–40
–30
–20
9.0
8.5
8.0
7.0
7.5
6.5
6.0
–40
25°C
85°C



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