Datasheet

IEEE 802.3af/at-Compliant, Powered Device Interface
Controllers with Integrated 70W High-Power MOSFET
MAX5982A/MAX5982B/MAX5982C
_______________________________________________________________________________________ 5
Typical Operating Characteristics
(V
IN
= (V
DD
- V
SS
) = 54V, R
DET
= 24.9kω, R
CLS
= 615ω, and R
SL
= 60.4kω. RTN, WAD, PG, 2EC, WK, and ULP unconnected; all
voltages are referenced to V
SS.
)
DETECTION CURRENT
vs. INPUT VOLTAGE
MAX5982A toc01
V
IN
(V)
I
IN
(mA)
8642
0.1
0.2
0.3
0.4
0.5
0
01
0
I
IN
= I
VDD
+ I
DET
R
DET
= 25.4kI
RTN = 2EC = PG = WAD = V
DD
CLASSIFICATION CURRENT
vs. INPUT VOLTAGE
MAX5982A toc04
V
IN
(V)
I
IN
(mA)
252015105
10
20
30
40
50
60
70
0
03
0
CLASS 5
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
SIGNATURE RESISTANCE
vs. INPUT VOLTAGE
MAX5982A toc02
V
IN
(V)
R
SIGNATURE
(kI)
8642
24.5
25.0
25.5
26.0
24.0
01
0
I
IN
= I
VDD
+ I
DET
R
DET
= 25.4kI
RTN = 2EC = PG = WAD = V
DD
T
A
= +85°C
T
A
= -40°C
T
A
= +25°C
CLASSIFICATION SETTLING TIME
MAX5982A toc05
V
IN
5V/div
I
IN
100mA/div
V
CLS
2V/div
100µs/div
STEP INPUT APPLIED TO
V
IN
FROM 10V TO 12V
INPUT OFFSET CURRENT
vs. INPUT VOLTAGE
MAX5982A toc03
V
IN
(V)
INPUT OFFSET CURRENT (µA)
8642
-4
-3
-2
-1
0
1
2
3
4
5
-5
01
0
T
A
= +85°C
T
A
= -40°C
T
A
= +25°C
2EC SINK CURRENT vs. 2EC VOLTAGE
MAX5982A toc06
V
2EC
(V)
I
2EC
(mA)
5040302010
0.4
0.8
1.2
1.6
2.0
0
06
0
T
A
= +85°C
T
A
= -40°C
T
A
= +25°C
PG SINK CURRENT vs. PG VOLTAGE
MAX5982A toc07
V
PG
(V)
I
PG
(µA)
5040302010
100
150
200
250
300
50
06
0
T
A
= +85°C
T
A
= -40°C
T
A
= +25°C
INRUSH CURRENT LIMIT
vs. RTN VOLTAGE
MAX5982A toc08
V
RTN
(V)
INRUSH CURRENT LIMIT (A)
504010 20 30
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0
06
0
NORMAL OPERATION CURRENT LIMIT
vs. RTN VOLTAGE
MAX5982A toc09
V
RTN
(V)
CURRENT LIMIT (A)
5040302010
0.5
1.0
1.5
2.0
2.5
0
06
0