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SI3460-EVB 데이터시트(PDF) 4 Page - Silicon Laboratories

부품명 SI3460-EVB
상세설명  IEEE 802.3af PSE INTERFACE AND DC-DC CONTROLLER
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Si3460
4
Preliminary Rev. 0.4
2. Si3460-EVB Application Diagram
Figure 2. Si3460-EVB Application Diagram
2.1. Si3460-EVB Performance Characteristics
When implemented according to the recommended external components and layout guidelines for the Si3460-
EVB, the Si3460 enables the following performance specifications in single-port PSE applications. Please refer to
the Si3460-EVB User’s Guide and schematics for details.
Table 1. Selected Electrical Specifications (Si3460-EVB)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Power Supplies
VIN input supply range
VIN
–40 to +85 °C ambient range
11
12, 15
16
V
VIN input UVLO voltage
UVLO
UVLO turn-off voltage at VIN
10
V
VDD supply voltage range
VDD
Si3460 supply voltage range
2.7
3.3
3.6
V
VDD UVLO voltage
VDDmin
Si3460 UVLO turn-off voltage
2.7
V
Output supply voltage
VOUT
PSE output voltage at
VIN = 11 V (min) to 16 V (max)
–54
–50
–46
V
Supply current
IIN
Current into VDD
(including gate drive and detect)
—5—
mA
Detection Specifications
Minimum signature resistance
RDETmin
15
17
19
k
Ω
Maximum signature resistance
RDETmax
26.5
29
33
k
Ω
Classification Specifications
Classification voltage
VCLASS
0mA < ICLASS < 45 mA
–20.5
–15.5
V
Classification current limit
ICLASS
Measured with 200
Ω across VOUT
55
95
mA
Classification current region
ICLASS_REGION
Class 0
0
5
mA
Class 1
8
13
mA
Class 2
16
21
mA
Class 3
25
31
mA
Class 4
35
45
mA
Si3460
GND
DETA
VIN
+11V
to
16V
VOUT
-48 V
PSE
output
(to port
magnetics)
RST
VDD
PWM
BOM
Detect
BOM
ISENSE
VEE
STATUS
250KHZ
CTRL1
GATE
VSENSE
DETECT
FAULT
PGOOD
CTRL2
Note: Refer to the Si3460-EVB User Guide for complete schematic details


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