IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated Power MOSFET
10 _____________________________________________________________________________________
Typical Operating Circuit
2-EVENT
CLASSIFICATION
DETECTION
-54V
MAX5981A
MAX5981B
1kI
V
DD
RTN
WAD
PG
2EC/WAD
2EC
24V/48V
BATTERY
1.5mA
WK
SL
ULP
LED
-54V
-54V
-54V
ISOLATED SLEEP
MODE INPUT
ISOLATED ULP
MODE INPUT
68nF
RJ-45
AND
BRIDGE
RECTIFIER
GND
SMAJ58A
R
DET
24.9kI
R
CLS
V
SS
DET
CLS
ENABLE
DC-DC
CONVERTER
IN+
IN-
GND