SI3452 SILABS [Silicon Laboratories], SI3452 Datasheet - Page 11

• Manufacturer Part Number: SI3452
• Description: QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND POE+ PSES
• Manufacturer: SILABS [Silicon Laboratories]

2. PSE System-Level Diagrams
3. PSE Application Diagrams
Figure 3. 4-Port Application Diagram Using DC– or dV/dt Disconnect and I
Controller
Host
Host / Switch
Bidirectional
Isolator
Si8405
(e.g. TLV431)
1.1 V
I2C
Figure 2. 4-Port System with Direct Host Connection
44.2 k
1%
AD0
AD1
AD2
AD3
VREF
RBIAS
SDA
VEE
–54 V
SCL
RST
INT
Si8405 Digital
VEE[4:1]
Isolator
SDA
SCL
RST
INT
4x10 k
VOUT4
Si3452/3
VOUT3
+3.3 V
Rev. 1.0
VDD
VOUT2
AGND
or low to
Tie high
address
GND12/34
select
VOUT1
DGND
DET4
DET3
DET2
DET1
RAM
OTP
I2C
Measurement
Si3452/3
Mixed Signal
Subsystem
Resources
PSE State
Machines
and
2
C Host Interface
Si3452/3
PORT1
PORT2
PORT3
PORT4
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