ltc4259a Linear Technology Corporation, ltc4259a Datasheet - Page 6

• Manufacturer Part Number: ltc4259a
• Description: Quad Ieee 802.3af Power Over Ethernet Controller With Ac Disconnect
• Manufacturer: Linear Technology Corporation

LTC4259A
TEST TI I G
6
V
TO V
SENSE n
INT
EE
W U
Figure 4. DC Disconnect Timing
V
MIN
SDA
SCL
V
t
V
Figure 2. Detect, Class and Turn-On Timing in Auto or Semiauto Modes
VMIN
PORT n
GATE n
t
INT
V
1
SENSE n
t
2
V
0V
EE
INSERTED
TO V
t
t
DIS
3
PD
INT
EE
t
V
4
LIM
0V
4259A F04
Figure 3. Current Limit Timing
Figure 6. I
t
t
5
DETDLY
t
DET
t
r
t
CLSDLY
2
t
C Interface Timing
f
V
t
6
V
CLASS
CUT
t
PON
t
START
I
t
DETECT n
7
V
4259A F03
V
t
OSCIN
CLASS
, t
OUT n
INT
ICUT
V
T
Figure 5. AC Disconnect Timing
PORT
TURN ON
(AUTO MODE)
4259A F02
I
ACDMIN
PD REMOVED
t
DIS
4259A F06
t
8
4259A F05
4259afb