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SI3402-B-GM Folha de dados(PDF) 8 Page - Silicon Laboratories

Nome de Peças SI3402-B-GM
Descrição Electrónicos  FULLY-INTEGRATED 802.3-COMPLIANT POE PD INTERFACE AND LOW-EMI SWITCHING REGULATOR
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Fabricante Electrônico  SILABS [Silicon Laboratories]
Página de início  http://www.silabs.com
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Si3402-B
8
Rev. 1.0
2. Typical Application Schematics
Figure 1. Schematic—Class 0 with Non-Isolated 5 V Output*
*Note: This is a simplified schematic. See application note, “AN956: Using the Si3402-B PoE PD Controller in Isolated and
Non-Isolated Designs” for more details and complete application schematics.
Table 7. Component Listing—Class 0 with 5 V Output
Item
Type
Value
Toler.
Rating
Notes
C1
Capacitor
15 µF
20%
100 V
Switcher supply capacitor. Several paral-
lel capacitors are used for lower ESR.
C2
Capacitor
0.1 µF
20%
100 V
PD input supply capacitor.
C3
Capacitor
560 µF
20%
10 V
Switcher load capacitor — 560 µF in
parallel with X5R 22 µF capacitor for
lower ESR.
C4
Capacitor
0.1 µF
20%
16 V
VDD bypass capacitor.
C5
Do not populate.
C6
Capacitor
1 nF
10%
16 V
Compensation capacitor.
C7
Do not populate.
R1
Resistor
24.3 k
1%
1/16 W
Detection resistor.
R2
Resistor
8.66 k
1%
1/16 W
Feedback resistor divider.
R3
Resistor
3.24 k
1%
1/16 W
Feedback resistor divider.
R4
Resistor
47 k
20%
1/16 W
Feedback compensation resistor.
D1
Diode
100 V
Schottky diode; part no. PDS5100.
L1
Inductor
33 µH
20%
3.5 A
Coilcraft part no. MSS1278-333ML.
C1
Si3402
RJ-45
To
Ethernet PHY
R1
RCL
RDET
CT1
CT2
SP1
SP2
L1
SWO
D1
R2
R3
FB
EROUT
C2
C3
C5
C6
R4
C4
C7


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