SI3452 SILABS [Silicon Laboratories], SI3452 Datasheet - Page 27

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

9. Pin Descriptions
Pin #
10
12
11
1
2
3
4
5
6
7
8
9
VOUT4
AGND
RBIAS
AGND
AOUT
Name
VREF
VEE1
VEE4
VEE
AIN
NC
NC
Analog output
Analog input
Analog input
Analog input
No connect
No connect
Analog I/O
Ground
Ground
Supply
Supply
Supply
Type
RBIAS
AGND
AGND
AOUT
VREF
VEE1
VEE4
VEE
AIN
NC
Table 25. Si3452/3 Pin Descriptions
10
2
3
4
5
6
7
1
8
9
Driver 1 VEE supply. Short to VEE, VEE2/3/4.
Global PoE (–48 V nom.) or PoE+ (–54 V nom.) supply. Short to VEE1/2/3/4.
1.1 V nom. voltage reference from reference generator (for example, TLV431 or
power management unit).
Measurement data converter input. Short to AOUT.
Measurement multiplexer subsystem output. Short to AIN.
Analog ground reference. Short to AGND pin 8, GND12/34, DGND.
External 44.2 kΩ (±1%) resistor to ground sets internal bias currents.
Analog ground reference. Short to AGND pin 6, GND12/34, DGND.
Do not connect (float).
Driver 4 VEE supply. Short to VEE, VEE1/2/3.
Do not connect (float).
Port 4 power FET switch output. When on, provides a low impedance path to
VEE4.
(Top View)
Si3452
Rev. 1.0
Description
22
30
29
28
27
26
25
24
21
23
VDD
DGND
AD0
AD1
AD2
AD2
AD3
RST
VEE3
AD3
Si3452/3
27