MAX5942A Maxim, MAX5942A Datasheet - Page 9

• Manufacturer Part Number: MAX5942A
• Description: IEEE 802.3af Power-Over-Ethernet Interface/PWM Controller for Power Devices
• Manufacturer: Maxim

(V
Typical values are at T
voltages are referenced to V- (for graphs 12–30 in the Typical Operating Characteristics), unless otherwise noted.
IN
= (GND - V
Interface/PWM Controller for Power Devices
1.60
1.59
1.58
1.57
1.56
1.55
1.54
1.53
1.52
1.51
10.4
10.2
10.0
EE
48.0
47.9
47.8
47.7
47.6
47.5
47.4
47.3
47.2
47.1
47.0
9.8
9.6
9.4
9.2
9.0
) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = V
0
0
0
_______________________________________________________________________________________
DEVICE POWERED
FROM V+
A
V
MAXIMUM DUTY CYCLE vs. V
CC
5
= +25°C. All voltages are referenced to V
20
V+ SUPPLY CURRENT vs.
VOLTAGE vs. V
5
10
V
V+ = +67V, V
CC
V
V+ VOLTAGE
V+ VOLTAGE (V)
40
FB
15
V
MAX5942B
CURRENT (mA)
FB
= V
V
DEVICE POWERED
FROM V
= 4V, CS = V-
DD
10
V
20
DD
DD
60
(V)
= V-
FB
= 36V
CC
IEEE 802.3af Power-Over-Ethernet
= 4V
25
DD
CURRENT
V
80
DD
15
30
= 13V
Typical Operating Characteristics (continued)
DD
35
100
20
40
EE
(for graphs 1–11 in the Typical Operating Characteristics); all
10.2
10.1
10.0
10.0
9.9
9.8
9.7
9.6
9.5
9.9
9.8
9.7
9.6
9.5
9.4
9.3
9.2
9.1
9.0
16
14
12
10
8
6
4
2
0
0
0
0
V+ SUPPLY CURRENT vs. V+ VOLTAGE
EE
10 20
V
, V
5
CC
DD
VOLTAGE vs. V
10
30
5
(AFTER STARTUP)
= 13V, NDRV floating, T
V+ = 67V
V
V
V
DEVICE POWERED
FROM V+
DEVICE POWERED FROM V
DD
DD
CC
40
V+ VOLTAGE (V)
V+ = 48V
V
15
= GND, V
CC
= 13V, FB = V-
CURRENT (mA)
50 60 70 80 90
V
DD
vs. V
10
20
(V)
FB
CC
DD
25
= 4V
CURRENT
V+ = 36V
FB = V-
15
30
V+ = 24V
35
DD
100
110
20
40
A
= T
MIN
to T
MAX
9
.