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SI3400-X-GM Datasheet(PDF) 8 Page - Silicon Laboratories

Part # SI3400-X-GM
Description  Support non-isolated and isolated switching topologies Comprehensive protection circuitry
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI3400-X-GM Datasheet(HTML) 8 Page - Silicon Laboratories

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Si3400/Si3401
8
Rev. 0.9
2. Typical Application Schematics
Figure 1. Schematic—Class 0 with Non-Isolated 5 V Output*
*Note: This is a simplified schematic. See “AN296:
Using the Si3400/01 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
1000 µF
20%
10 V
Switcher load capacitor - 1000 µF in par-
allel with and X5R 22 µF for lower ESR.
C4
Capacitor
0.1 µF
20%
16 V
VDD bypass capacitor.
C5
Capacitor
0.1 µF
10%
16 V
Softstart capacitor.
C6
Capacitor
3.3 nF
10%
16 V
Compensation capacitor.
C7
Capacitor
150 pF
10%
16 V
Compensation capacitor.
R1
Resistor
25.5 k
1%
1/16 W
Detection resistor.
R2
Resistor
7.32 k
1%
1/16 W
Feedback resistor divider.
R3
Resistor
2.87 k
1%
1/16 W
Feedback resistor divider.
R4
Resistor
30.1 k
1%
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. DO5010333.
C1
Si3400
Si3401
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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