Linear Technology DC1335B-B - LTC4269-1 | PoE Powered Device w/48V Isolated Auxiliary DC1335B-B DC1335B-B 데이터 시트
제품 코드
DC1335B-B
LTC4269-1
3
42691fc
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Interface Controller (Note 4)
Operating Input Voltage
Signature Range
Classifi cation Range
ON Voltage
OFF Voltage
Overvoltage Lockout
Classifi cation Range
ON Voltage
OFF Voltage
Overvoltage Lockout
At V
PORTP
(Note 5)
l
l
l
l
1.5
12.5
30.0
71
60
9.8
21
37.2
V
V
V
V
V
V
V
V
V
V
V
ON/OFF Hysteresis Window
l
4.1
V
Signature/Class Hysteresis Window
l
1.4
V
Reset Threshold
State Machine Reset for 2-Event Classifi cation
l
2.57
5.40
V
Supply Current
Supply Current at 57V
Measured at V
PORTP
Pin
l
1.35
mA
Class 0 Current
V
PORTP
= 17.5V, No R
CLASS
Resistor
l
0.40
mA
Signature
Signature Resistance
1.5V ≤ V
PORTP
≤ 9.8V (Note 6)
l
23.25
26
kΩ
Invalid Signature Resistance, SHDN Invoked
1.5V ≤ V
PORTP
≤ 9.8V, V
SHDN
= 3V (Note 6)
l
11
kΩ
Invalid Signature Resistance During Mark Event (Notes 6, 7)
l
11
kΩ
Classifi cation
Class Accuracy
10mA < I
CLASS
< 40mA, 12.5V < V
PORTP
< 21V
(Notes 8, 9)
l
±3.5
%
Classifi cation Stability Time
V
PORTP
Pin Step to 17.5V, R
CLASS
= 30.9, I
CLASS
Within
3.5% of Ideal Value (Notes 8, 9)
l
1
ms
Normal Operation
Inrush Current
V
PORTP
= 54V, V
NEG
= 3V
l
60
100
180
mA
Power FET On-Resistance
Tested at 600mA into V
NEG
, V
PORTP
= 54V
l
0.7
1.0
Ω
Power FET Leakage Current at V
NEG
V
PORTP
= SHDN = V
NEG
= 57V
l
1
μA
Digital Interface
SHDN Input High Level Voltage
l
3
V
SHDN Input Low Level Voltage
l
0.45
V
SHDN Input Resistance
V
PORTP
= 9.8V, SHDN = 9.65V
l
100
kΩ
PWRGD, T2P Output Low Voltage
Tested at 1mA, V
PORTP
= 54V. For T2P, Must Complete
2-Event Classifi cation to See Active Low
l
0.15
V
PWRGD, T2P Leakage Current
Pin Voltage Pulled 57V, V
PORTP
= V
PORTN
= 0V
l
1
μA
PWRGD Output Low Voltage
Tested at 0.5mA, V
PORTP
= 52V, V
NEG
= 48V, Output
Voltage Is with Respect to V
NEG
l
0.4
V
PWRGD Clamp Voltage
Tested at 2mA, V
NEG
= 0V, Voltage with Respect to V
NEG
l
12
16.5
V
PWRGD Leakage Current
V
PWRGD
= 11V, V
NEG
= 0V, Voltage with Respect to V
NEG
l
1
μA