Rainbow Electronics MAX5945 - Manual (Page 7)

MAX5945
Quad Network Power Controller
for Power-Over-LAN
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DIGITAL SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX5945 toc04
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
4.6 4.2 3.8 3.4 3.0 2.6 2.2
1
2
3
4
5
6
0
1.8 5.0
MEASURED AT V DD
V EE UNDERVOLTAGE LOCKOUT
vs. TEMPERATURE
MAX5945 toc05
TEMPERATURE ( °C)
UNDERVOLTAGE LOCKOUT (V)
60 35 10 -15
27.5
28.0
28.5
29.0
29.5
30.0
27.0
-40 85
GATE OVERDRIVE
vs. INPUT VOLTAGE
MAX5945 toc06
INPUT VOLTAGE (V)
GATE OVERDRIVE (V)
57 52 47 42 37
9.80
9.82
9.84
9.86
9.88
9.90
9.92
9.94
9.96
9.98
9.78
32 62
GATE OVERDRIVE
vs. TEMPERATURE
MAX5945 toc07
TEMPERATURE ( °C)
GATE OVERDRIVE (V)
60 35 10 -15
9.6
9.7
9.8
9.9
10.0
10.1
10.2
10.3
10.4
10.5
9.5
-40 85
SENSE TRIP VOLTAGE
vs. TEMPERATURE
MAX5945 toc08
TEMPERATURE ( °C)
SENSE TRIP VOLTAGE (mV)
60 35 10 -15
175
180
185
190
195
200
170
-40 85
SENSE TRIP VOLTAGE
vs. INPUT VOLTAGE
MAX5945 toc09
INPUT VOLTAGE (V)
SENSE TRIP VOLTAGE (mV)
57 52 47 42 37
182
184
186
188
190
180
32 62
FOLDBACK CURRENT-LIMIT
THRESHOLD vs. OUTPUT VOLTAGE
MAX5945 toc10
V OUT - V EE (V)
V
SENSE
- V
EE
(mV)
40 30 20 10
50
100
150
200
250
300
0
0 50
ZERO-CURRENT DETECTION
THRESHOLD vs. TEMPERATURE
MAX5945 toc11
TEMPERATURE ( °C)
DETECTION THRESHOLD (mV)
60 35 10 -15
1
2
3
4
5
0
-40 85
Typical Operating Characteristics (continued)
(V EE = -48V, V DD = +3.3V, AUTO = AGND = DGND = 0V, RESET = SHD_ = unconnected, R SENSE = 0.5 Ω, all registers = default setting,
T A = +25°C, unless otherwise noted.)