MAX5942BCSE(2003) データシートの表示（PDF） - Maxim Integrated
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MAX5942BCSE
(Rev.:2003)
(Rev.:2003)
Maxim Integrated
MAX5942BCSE Datasheet PDF : 24 Pages
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IEEE 802.3af Power-Over-Ethernet
Interface/PWM Controller for Power Devices
Typical Operating Characteristics
(VIN = (GND - VEE) = 48V, GATE = PGOOD = PGOOD = OUT = OPEN, UVLO = VEE, VDD = 13V, NDRV floating, TA = TMIN to TMAX.
Typical values are at TA = +25°C. All voltages are referenced to VEE (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.
DETECTION CURRENT vs.
INPUT VOLTAGE
0.45
RDISC = 25.5kΩ
0.40 GND = V+ = V- = OUT
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
0
2
4
6
8
10
INPUT VOLTAGE (V)
OFFSET CURRENT
vs. INPUT VOLTAGE
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
1 2 3 4 5 6 7 8 9 10 11
INPUT VOLTAGE (V)
CLASSIFICATION CURRENT
vs. INPUT VOLTAGE
40
CLASS 4
35
30
25
CLASS 3
20
15
CLASS 2
10
CLASS 1
5
CLASS 0
0
10
15
20
25
30
INPUT VOLTAGE (V)
NORMALIZED UVLO
vs. TEMPERATURE
1.010
1.008 UVLO = VEE
1.006
1.004
1.002
1.000
0.998
0.996
0.994
0.992
0.990
-40 -15
10
35
60
85
TEMPERATURE (°C)
EFFECTIVE DIFFERENTIAL INPUT
RESISTANCE vs. INPUT VOLTAGE
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
5
10
15
INPUT VOLTAGE (V)
PGOOD OUTPUT LOW VOLTAGE
vs. CURRENT
200
180
160
140
120
100
80
60
40
20
0
0
4
8
12
16
20
ISINK (mA)
PGOOD OUTPUT LOW VOLTAGE
vs. CURRENT
400
350
300
OUT LEAKAGE CURRENT
vs. TEMPERATURE
20
VOUT = 67V
16
INRUSH CURRENT CONTROL
(VIN = 12V)
MAX5942A/B toc09
VGATE
5V/div
250
12
200
IINRUSH
100mA/div
150
100
50
0
0
4
8
12
16
20
ISINK (mA)
8
4
0
-40 -15
10
35
60
85
INPUT VOLTAGE (V)
1ms/div
VOUT
10V/div
PGOOD
10V/div
6 _______________________________________________________________________________________
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