A
20 Watt NT Dual Series DC/DC Converters
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
6
eco: 010403-2
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
0
10
2030
405060
7080
90
100
LOAD (%)
70
75
80
85
EFFICIENCY
(%)
12 VOLT EFFICIENCY Vs. LOAD
LINE = 9VDC
LINE = 12VDC
LINE = 18VDC
9
1011
1213
1415
1617
18
LINE INPUT(VOLTS)
70
75
80
85
EFFICIENCY(%)
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
100% FULL LOAD
50% FULL LOAD
02
46
8
10
12
14
16
18
LINE INPUT (VOLTS)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
INPUT
CURRENT
(AMPS)
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% LOAD
50% LOAD
18
20
22
24
26
28
30
32
34
36
LINE INPUT(VOLTS)
75
80
85
90
EFFICIENCY(%)
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
100% FULL LOAD
50% FULL LOAD
0
10
2030
405060
7080
90
100
LOAD (%)
70
75
80
85
90
EFFICIENCY
(%)
24 VOLT EFFICIENCY Vs. LOAD
LINE = 18VDC
LINE = 24VDC
LINE = 36VDC
0
4
8
1216
2024
2832
36
LINE INPUT (VOLTS)
0.0
0.5
1.0
1.5
2.0
INPUT
CURRENT
(AMPS)
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% LOAD
50% LOAD
NOTES ON USING THE CURVES
1) The Input currents are for 20 Watts of output power. For ±5 Volt
output models the current is approximately 15% less.
2) The efficiency curves were generated for 12 Volt output models.
To use for other outputs adjust as follows:
±5 Volt outputs.......Subtract approximately 3%
±15 Volt outputs.....Add approximately 1%
0
10
2030
405060
7080
90
100
LOAD (%)
60
70
80
90
EFFICIENCY
(%)
48 VOLT EFFICIENCY Vs. LOAD
LINE = 36VDC
LINE = 48VDC
LINE = 72VDC
0
1020
30405060
7080
LINE INPUT (VOLTS)
0.00
0.25
0.50
0.75
1.00
INPUT
CURRENT
(AMPS)
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% LOAD
50% LOAD
36
40
44
48
52
56
60
64
68
72
LINE INPUT(VOLTS)
70
75
80
85
90
EFFICIENCY(%)
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
100% FULL LOAD
50% FULL LOAD
10
100
1000
10000
100000
1000000
FREQUENCY (Hz)
.1
1
10
OUTPUT
IMPEDANCE
(OHMS)
OUTPUT IMPEDANCE Vs. FREQUENCY
-40
-20
0
20
40
60
80
100
AMBIENT TEMPERATURE (Deg C)
0
20
40
60
80
100
120
OUTPUT
POWER
(%)
DERATING
INFINITE HEAT SINK
NO HEAT SINK
↑
← SAFE OPERATING AREA →
↓