SI3452D-B01-GM Silicon Laboratories Inc, SI3452D-B01-GM Datasheet - Page 24

• Manufacturer Part Number: SI3452D-B01-GM
• Description: IC POE CONTROLLER MIDSPAN 40QFN
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3452D-B01-GM

• Package / Case: 40-QFN
• Controller Type: Power over Ethernet Controller (POE)
• Interface: I²C
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 14mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Maximum Power Dissipation: 1.2 W
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Product: Ethernet Controllers
• Standard Supported: IEEE 802.3at, IEEE 802.3af
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Supply Current (max): 14 mA
• Maximum Operating Temperature: + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1835-5

Si3452
24
0 or 1 don’t care
0 or 1 don’t care
0 or 1 don’t care
0
1
*Note: During initial port turn-on (T
Power on port
Power off port
Reset port
Toggle detection
back-off timing
Reset chip
Get V
Read port current
Shut down
low-priority ports
Notes:
1. Port 1 has 2 bit port number 0x00; port 2 is 0x01, etc.
2. This command toggles bit 0 of Register 0x1D. When bit zero is set, the detection back-off of 2 seconds is implemented
Command
EE
(alternative B or “midspan” mode).
PoE+ bit
2
CMD Register
0x0C | port no
0x1C | port no
0x04 | port no
0x08 | port no
0x10
0x14
0x18
0x20
Class
0/3
START
1
2
4
4
Table 23. Si3452 Port Configuration
Table 24. Si3452 Command Codes
time of 60 ms), the current limit is set to 425 mA, even in PoE+ mode.
[B5..B2]
0001b
0010b
0011b
0100b
0101b
0110b
1000b
0111b
Auto Mode Setting of
I
CUT
Rev. 1.2
0xC9
0x1E
0x35
0x75
0x75
Register
[B1..B0] Command
2 bit port number
2 bit port number
2 bit port number
2 bit port number
Parameter
NA
NA
NA
NA
I
CUT
170 mA
375 mA
375 mA
640 mA
97 mA
1
Nominal
Port current in 100 µA
2 Byte Return Value
V
EE
Ilim Nominal*
in mV units
units
—
—
—
—
—
—
425 mA
425 mA
425 mA
425 mA
850 mA