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SI3400-X-GM датащи(PDF) 9 Page - Silicon Laboratories

номер детали SI3400-X-GM
подробное описание детали  Support non-isolated and isolated switching topologies Comprehensive protection circuitry
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производитель  SILABS [Silicon Laboratories]
домашняя страница  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI3400-X-GM датащи(HTML) 9 Page - Silicon Laboratories

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Si3400/Si3401
Rev. 0.9
9
Figure 2. Schematic—Class 1 with Isolated 5.0 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 8. Components—Class 1 with Isolated 5.0 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
1100 µF
20%
10 V
Switcher load capacitor. 100 µF in parallel
1000 µF and optional 1 µH inductor for
additional filtering.
C4
Capacitor
15 nF
10%
16 V
Feedback compensation.
C5
Capacitor
220 nF
10%
16 V
Feedback compensation.
C7
Capacitor
0.1 µF
20%
16 V
VDD bypass capacitor.
C8
Capacitor
1 µF
20%
16 V
Isolated mode soft start (tie ISOSSFT to
VDD if this feature is not used).
R1
Resistor
25.5 k
Ω
1%
1/16 W
Detection resistor.
R2
Resistor
4.99 k
Ω
1%
1/16 W
Pull-up resistor.
R3
Resistor
100
Ω
1%
1/16 W
Feedback compensation resistor.
R4
Resistor
10 k
Ω
1%
1/16 W
Feedback compensation resistor.
R5
Resistor
2.05 k
Ω
1%
1/16 W
Pull-up resistor.
R6
Resistor
36.5 k
Ω
1%
1/16 W
Feedback resistor divider.
R7
Resistor
12.1 k
Ω
1%
1/16 W
Feedback resistor divider.
R8
Resistor
127
Ω
1%
1/16 W
Classification resistor.
D1
Diode
10 A
40 V
Schottky diode; part no. PN PDS1040.
D2
Diode
1 A
100 V
Snubber diode (1N4148)
D3
Diode
15 V
9 A
Snubber diode (DFLT15A)
T1
Transformer
40 µH
Coilcraft part number FA2672 (5 V).
PS2911
Optocoupler
TLV431
Voltage reference
C1
Si3400
Si3401
RJ-45
To Ethernet PHY
RCL
RDET
CT1
CT2
SP1
SP2
C2
SWO
C3
D1
R5
R7
R6
PS2911
T1
R2
VDD
EROUT
R1
ISOSSFT
R3
C5
C4
R4
C7
R8
D2
D3
C8


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