IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated Power MOSFET
_______________________________________________________________________________________ 9
Simplified Block Diagram
1.5mA
46礎
V
DD
EN
CLS
2EC
V
DD
5V
D
Q
Q
SET
CLR
DET
V
SS
5V REGULATOR
THERMAL
SHUTDOWN
Q
R
S
V
DD
V
DD
V
DD
WAD
RTN
LED
V
ON
/V
OFF
V
DD
D
Q
Q
SET
CLR
9V
230礎
PG
CLASSIFICATION
I
SWITCH
LOGIC
K x I
SWITCH
ISOLATION
SWITCH
S
MUX
I0
I1
1/K
MAX5981A
MAX5981B
SL
WK
ULP
5V
50kI
5V
2.5kI
t
DELAY