Datasheet

MAX5941A/MAX5941B
IEEE 802.3af-Compliant Power-Over-Ethernet
Interface/PWM Controller for Power Devices
_______________________________________________________________________________________ 9
47.0
47.2
47.1
47.4
47.3
47.6
47.5
47.7
47.9
47.8
48.0
010155 2025303540
MAXIMUM DUTY CYCLE vs. V
DD
MAX5941A/B toc25
V
DD
(V)
MAXIMUM DUTY CYCLE (%)
V
OPTO
= 4V, CS = V-
DRIVER POWERED
FROM V+
DRIVER POWERED
FROM V
DD
9.5
9.6
9.8
9.7
10.0
10.1
9.9
10.2
010155 2025303540
V
CC
vs. V
DD
MAX5941A/B toc26
V
DD
(V)
V
CC
(V)
DEVICE POWERED FROM V
DD
DEVICE POWERED
FROM V+
1.31
1.33
1.32
1.36
1.35
1.34
1.39
1.38
1.37
1.40
04020 60 80 100
V+ SUPPLY CURRENT
vs. V+ VOLTAGE
MAX5941A/B toc27
V+ VOLTAGE (V)
V+ SUPPLY CURRENT (mA)
V
OPTO
= 4V, CS = V
DD
= V-
0
6
4
2
8
10
12
0403010 20 50 60 70 80 90 110
V+ INPUT CURRENT vs. VOLTAGE
(AFTER STARTUP)
MAX5941A/B toc28
V+ VOLTAGE (V)
V+ INPUT CURRENT (µA)
100
V
OPTO
= 4V, CS = V-, V
DD
= 13V
9.0
9.4
9.2
9.8
9.6
10.2
10.0
10.4
V
CC
VOLTAGE vs. V
CC
CURRENT
MAX5941A/B toc29
V
CC
CURRENT (mA)
V
CC
VOLTAGE (V)
0 5 10 15 20
V+ = 67V, OPTO = CS = V-
V
DD
= 36V
V
DD
= 13V
9.0
9.3
9.2
9.1
9.4
9.5
9.6
9.7
9.8
9.9
10.0
0 5 10 15 20
V
CC
VOLTAGE vs. V
CC
CURRENT
MAX5941A/B toc30
V
CC
CURRENT (mA)
V
CC
VOLTAGE (V)
V
DD
= OPTO = CS = V-
V+ = 48V
V+ = 67V
V+ = 36V
V+ = 24V
Typical Operating Characteristics (continued)
(V
IN
= (GND - V
EE
) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = V
EE
, V
DD
= 13V, NDRV floating, T
A
= T
MIN
to T
MAX
.
Typical values are at T
A
= +25°C. All voltages are referenced to V
EE
(for graphs 1–11 in the Typical Operating Characteristics), all
voltages are referenced to V- (for graphs 12–30 in the Typical Operating Characteristics), unless otherwise noted.)