MAX5945 MAXIM [Maxim Integrated Products], MAX5945 Datasheet - Page 39

• Manufacturer Part Number: MAX5945
• Description: Quad Network Power Controller for Power-Over-LAN
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 16. PoE System Diagram of One Complete Port, Midspan PSE
V
VCCRTN
CC
SDA
SCL
(3.3V)
OPTIONAL BUFFER
OPTIONAL BUFFER
______________________________________________________________________________________
180Ω
180Ω
3kΩ
ISOLATION
OPTIONAL BUFFER
HPCL063L
180Ω
(REF TO DGND)
1.8V TO 5V
HPCL063L
HPCL063L
3kΩ
3kΩ
-48V
3kΩ
Quad Network Power Controller
-48VRTN
V
SDAOUT
SDAIN
SCL
DGND
DD
0.5Ω
1%
MAX5945
1 OF 4 CHANNELS
100V, 120mΩ
FDT3612
SOT-223
for Power-Over-LAN
1kΩ
1N4002
MIDSPAN
OSC_IN
RESET
SHD_
-48VOUT
AUTO
1N4448
INT
50kΩ PULLUP
INTERNAL
1kΩ
DATA
INTERNAL PULLDOWN
(MANUAL MODE)
INTERNAL PULLDOWN
(SIGNAL MODE)
OFF
1kΩ
SINE WAVE
100Hz ±10%
PEAK AMPLITUDE 2.2V ±0.1V
VALLEY AMPLITUDE 0.2V ±0.1V
CONNECTOR
0.47µF
100V
RJ–45
V
DD
1
2
3
6
4
5
7
8
4.7kΩ
ON
SMBJ
58CA
0.1µF
2.2MΩ
-48VOUT
39