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LTC4271 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC4271
Description  Quad PoE/PoE/LTPoE PSE Controller
PDF  30 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4271 Datasheet(HTML) 8 Page - Linear Technology

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LTC4266A/LTC4266C
8
4266acfc
TYPICAL PERFORMANCE CHARACTERISTICS
802.3af ILIM Threshold
vs Temperature
DC Disconnect Threshold
vs Temperature
Current Limit Foldback
ADC Noise Histogram
Current Readback in Fast Mode
ADC Integral Nonlinearity
Current Readback in Fast Mode
802.3at ICUT Threshold
vs Temperature
802.3af ICUT Threshold
vs Temperature
TEMPERATURE (°C)
–40
105.00
106.50
105.75
107.25
108.00
420
423
426
429
432
040
4266AC G10
80
120
VDD = 3.3V
VEE = –54V
RSENSE = 0.25Ω
REG 48h = 80h
PORT 1
TEMPERATURE (°C)
–40
158
161
160
159
162
163
630
636
640
648
644
652
040
4266AC G11
80
120
VDD = 3.3V
VEE = –54V
RSENSE = 0.25Ω
REG 47h = E2h
PORT 1
TEMPERATURE (°C)
–40
93.00
94.50
93.75
95.25
96.00
372
375
378
381
384
040
4266AC G12
80
120
VDD = 3.3V
VEE = –54V
RSENSE = 0.25Ω
REG 47h = D4h
PORT 1
TEMPERATURE (°C)
–40
7.00
7.50
7.25
7.75
8.00
1.7500
1.8125
1.8750
1.9375
2.0000
040
4266AC G13
80
120
VDD = 3.3V
VEE = –54V
RSENSE = 0.25Ω
REG 47h = E2h
PORT 1
ADC OUTPUT
191
0
400
350
300
250
200
150
100
50
193
192
194
4266AC G15
195
196
VSENSEn – VEE = 110.4mV
CURRENT SENSE RESISTOR INPUT VOLTAGE (mV)
0
0
0.5
400
4266AC G16
–0.5
–1.0
100
200 250
500
1.0
300
50
150
450
350
VOUTn (V)
–54
0
900
800
700
600
500
400
300
200
100
0
225
200
175
150
125
100
75
50
25
–36
–45
–27
4266AC G14
–18
–9
0
VDD = 3.3V
VEE = –54V
RSENSE = 0.25Ω
REG 48h = C0h



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