ltc4270 Linear Technology Corporation, ltc4270 Datasheet - Page 10

• Manufacturer Part Number: ltc4270
• Description: 12-port Poe/poe+/ltpoe++ Pse Controller
• Manufacturer: Linear Technology Corporation

LTC4270/LTC4271
TEST TIMING DIAGRAMS
10
V
Figure 1. Detect, Class and Turn-On Timing in AUTO Pin or Semi-auto Modes
PORTn
INT
V
OC
V
SENSEn
0V
PD
CONNECTED
V
TO V
FORCED-CURRENT
SENSEn
INT
TO V
EE
INT
EE
Figure 3. DC Disconnect Timing
Figure 2. Current Limit Timing
t
DET
V
LIM
V
0V
MIN
FORCED-
VOLTAGE
V
V
CLASS
MARK
t
CLE
t
MPS
CLASSIFICATION
V
CUT
t
CLE
t
ME
t
t
DIS
PON
t
CLEON
t
START
t
MEL
42701 F02
, t
42701 F03
CUT
15.5V
20.5V
V
EE
42701 F01
42701f