MAX5942BCSE Maxim Integrated, MAX5942BCSE Datasheet - Page 7

• Manufacturer Part Number: MAX5942BCSE
• Description: Power Switch ICs - POE / LAN
• Manufacturer: Maxim Integrated

1.64
1.63
1.62
1.61
1.60
1.59
1.58
1.57
1.56
1.55
278
277
276
275
274
273
(V
Typical values are at T
voltages are referenced to V- (for graphs 12–30 in the Typical Operating Characteristics), unless otherwise noted.
-40
-40
IN
= (GND - V
-20
-20
INRUSH CURRENT CONTROL
V+ SUPPLY CURRENT
vs. TEMPERATURE
vs. TEMPERATURE
NDRV FREQUENCY
FB = V
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
Interface/PWM Controller for Power Devices
(V
FB = V-
DD
IN
2ms/div
EE
20
= V-
20
= 48V)
) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = V
_______________________________________________________________________________________
40
40
A
= +25°C. All voltages are referenced to V
MAX5942A/B toc10
60
60
80
80
V
5V/div
I
100mA/div
V
50V/div
P
50V/div
INRUSH
GATE
OUT
GOOD
IEEE 802.3af Power-Over-Ethernet
4.50
4.49
4.48
4.47
4.46
4.45
4.44
4.43
4.42
4.41
4.40
81.0
80.9
80.8
80.7
80.6
80.5
80.4
MAXIMUM DUTY CYCLE vs. TEMPERATURE
-40
-40
Typical Operating Characteristics (continued)
SOFT-START SOURCE CURRENT
-20
-20
INRUSH CURRENT CONTROL
vs. TEMPERATURE
V
V+ = 67V
TEMPERATURE (°C)
DD
TEMPERATURE (°C)
0
0
MAX5942A
(V
= FB = SS_SHDN = V-
FB = V-
2ms/div
IN
20
20
= 67V)
40
40
EE
(for graphs 1–11 in the Typical Operating Characteristics); all
60
60
80
80
V
5V/div
I
100mA/div
V
50V/div
P
50V/div
INRUSH
EE
GATE
OUT
GOOD
, V
DD
= 13V, NDRV floating, T
13.80
13.75
13.70
13.65
13.60
13.55
13.50
1.003
1.002
1.000
0.999
1.001
48.0
47.8
47.6
47.4
47.2
47.0
46.8
MAXIMUM DUTY CYCLE vs. TEMPERATURE
-40
-40
-40
TEMPERATURE (AFTER STARTUP)
-20
(AT THE END OF SOFT-START)
-20
-20
V
SS_SHDN
V+ INPUT CURRENT vs.
V+ = 67V, V
V
FB
TEMPERATURE (°C)
0
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
= V-
MAX5942B
vs. TEMPERATURE
FB = V-
DD
20
20
20
= 13V, FB = V-
A
= T
40
40
40
MIN
60
60
60
to T
MAX
80
80
80
7
.