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SI3460-EVB Folha de dados(PDF) 8 Page - Silicon Laboratories

Nome de Peças SI3460-EVB
Descrição Electrónicos  IEEE 802.3af PSE INTERFACE AND DC-DC CONTROLLER
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Fabricante Electrônico  SILABS [Silicon Laboratories]
Página de início  http://www.silabs.com
Logo SILABS - Silicon Laboratories

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Si3460
8
Preliminary Rev. 0.4
4. Si3460-EVB Performance Characteristics
When implemented in accordance with the recommended external components and layout guidelines, the Si3460
controller enables the following typical performance characteristics in single-port PSE applications. Refer to the
Si3460-EVB applications note, schematics, and user's guide for more details.
Table 5. PSE Performance Characteristics1
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Protection and Current Control
Overload current threshold
ICUT
All class levels
15,400/
VOUT
340
400
mA
Overload current limit
ILIM
Output = 100
Ω across VOUT
400
425
450
mA
Overload time
TLIM
Output = 100
Ω across VOUT
50
60
75
ms
Output power at overload
PLIM
15.4
17
W
Disconnect current
IMIN
Disconnect current
5
7.5
10
mA
Detection Specifications2
Detection voltage
VDET
Detection point 1 (w/ 10 k
Ω source)
Detection point 2 (w/ 10 k
Ω source)
Detection point 3 (w/ 10 k
Ω source)
4.5
7.5
4.5
V
Minimum signature
resistance
RDETmin
15
17
19
k
Ω
Maximum signature
resistance
RDETmax
26.5
29
33
k
Ω
Classification Specifications2
Classification voltage
VCLASS
0 mA < ICLASS < 45 mA
–20.5
–15.5
V
Classification current limit
ICLASS
Measured with 200
Ω across VOUT
55
95
mA
Classification current
region3
ICLASS_REGION
Class 0
Class 1
Class 2
Class 3
Class 4
0
8
16
25
35
5
13
21
31
45
mA
mA
mA
mA
mA
Notes:
1. Typical specifications are based on an ambient operating temperature of 25 ºC and VIN = +12 V unless otherwise
specified.
2. See “4. Si3460-EVB Performance Characteristics” for more details.
3. Absolute classification current limits are programmable.


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