Typical operating circuits – Rainbow Electronics MAX5965B User Manual
Page 50
MAX5965A/MAX5965B
High-Power, Quad, Monolithic, PSE Controllers
for Power over Ethernet
50
______________________________________________________________________________________
Typical Operating Circuits
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%
-48V
OUTPUT TO
PORT
-48V RTN
OUTPUT TO PORT
NOTE: ALL SIGNAL PINS ARE REFERENCED TO DGND.
DGND RANGE IS BETWEEN V
EE
AND (AGND + 4V).
1N4448
1 OF 4 CHANNELS
1.8V TO 3.7V,
(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
CAN BE UP TO 100k
Ω
HPCL063L
OPTIONAL BUFFER
OPTIONAL BUFFER
HPCL063L
HPCL063L
VCCRTN
V
CC
(3.3V)
SCL
SDA
SERIAL INTERF
ACE
3k
Ω
3k
Ω
ISOLATION
N.C.
SHD_
Typical Operating Circuit 1 (without AC Load Removal Detection)