Rainbow Electronics MAX5965B - Manual (Page 47)

MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
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MAX5965A
MAX5965B
-48V
GATE_
INTERNAL PULLDOWN
(MANUAL MODE)
100 Ω
-48VRTN
FDT3612
100V, 120m Ω
SOT-223
SENSE_ V EE OUT_
OFF
ON
DET_
SDAIN
SDAOUT
SCL
DGND
V DD
A0 A1 A2 A3
OSC_IN
AUTO
MIDSPAN
AGND
INTERNAL PULLDOWN
(SIGNAL MODE)
0.5 Ω
1%
1N4448
1k Ω
1 OF 4 CHANNELS
1.8V TO 5V
(REF TO DGND)
INT
RESET
3k Ω
3k Ω
180 Ω
180 Ω
180 Ω
OPTIONAL BUFFER
INTERNAL
50k Ω PULLUP 4.7k Ω
1k Ω
V DD
1N4002
HPCL063L
OPTIONAL BUFFER
OPTIONAL BUFFER
HPCL063L
HPCL063L
VCCRTN
V CC (3.3V)
SCL
SDA
SERIAL INTERF
ACE
3k Ω
3k Ω
ISOLATION
0.47 μF
100V
SHD_
SINE WAVE
100Hz
±10%
PEAK AMPLITUDE 2.2V ±0.1V
VALLEY AMPLITUDE 0.2V ±0.1V
SMBJ
58CA
0.1 μF 2.2M Ω
-48VOUT
8
7
5
4
6
3
2
1
RJ–45
CONNECTOR
-48VOUT
DATA
Figure 14. PoE System Block Diagram