SI3402-EVB Silicon Laboratories Inc, SI3402-EVB Datasheet - Page 9

• Manufacturer Part Number: SI3402-EVB
• Description: BOARD EVAL POE FOR SI3402
• Manufacturer: Silicon Laboratories Inc
• Type: PWM Controllersr

Specifications of SI3402-EVB

• Main Purpose: Special Purpose DC/DC, Power Over Ethernet
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 5V
• Voltage - Input: 44 ~ 57V
• Regulator Topology: Buck
• Frequency - Switching: 350kHz
• Board Type: Fully Populated
• Utilized Ic / Part: Si3402
• Input Voltage: 5 V
• Output Voltage: 3.3 V
• Interface Type: Ethernet
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Product: Power Management Modules
• For Use With/related Products: Si3402
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1827

2. Typical Application Schematics
*Note: This is a simplified schematic. See “AN296: Using the Si3400/1/2 PoE PD Controller in Isolated and Non-Isolated
Item
RJ-45
C1
C2
C3
C4
C5
C6
C7
R1
R2
R3
R4
D1
L1
Designs” for more details and complete application schematics.
Ethernet PHY
To
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Resistor
Resistor
Resistor
Resistor
Inductor
Diode
Type
C2
Figure 1. Schematic—Class 0 with Non-Isolated 5 V Output*
Table 8. Component Listing—Class 0 with 5 V Output
C1
1000 µF
25.5 k
8.66 k
2.87 k
30.1 k
150 pF
Value
0.1 µF
0.1 µF
0.1 µF
3.3 nF
33 µH
15 µF
R1
CT1
CT2
SP1
SP2
RDET
RCL
Toler.
20%
20%
20%
20%
10%
10%
10%
20%
1%
1%
1%
1%
Rev. 1.2
Si3402
C5
Rating
1/16 W
1/16 W
1/16 W
1/16 W
100 V
100 V
100 V
3.5 A
10 V
16 V
16 V
16 V
16 V
EROUT
SWO
FB
Switcher supply capacitor. Several paral-
lel capacitors are used for lower ESR.
PD input supply capacitor.
Switcher load capacitor - 1000 µF in par-
allel with and X5R 22 µF for lower ESR.
VDD bypass capacitor.
Softstart capacitor.
Compensation capacitor.
Detection resistor.
Feedback resistor divider.
Feedback resistor divider.
Feedback compensation resistor.
Schottky diode; part no. PDS5100.
Coilcraft part no. DO5010333.
Compensation capacitor.
C6
R4
D1
C4
L1
C7
R3
R2
Notes
C3
Si3402
9