A
20 Watt NT Single 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
3/2001
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
0
10
2030
405060
7080
90
100
LOAD (%)
65
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)
65
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
1
2
3
4
INPUT
CURRENT
(AMPS)
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% LOAD
50% LOAD
0
10
2030
405060
7080
90
100
LOAD (%)
65
70
75
80
85
90
EFFICIENCY
(%)
24 VOLT EFFICIENCY Vs. LOAD
LINE = 18VDC
LINE = 24VDC
LINE = 36VDC
18
20
22
24
26
28
30
32
34
36
LINE INPUT(VOLTS)
70
75
80
85
90
EFFICIENCY(%)
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
100% FULL LOAD
50% FULL LOAD
0
5
10
15
20
25
30
35
40
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
NOTE ON USING THE CURVES
These curves were generated for 12 volt output models. To use
for other models, adjust the efficiency values as shown below:
3.3 volt models ..... Subtract approximately 4%
5.0 volt models ..... Subtract approximately 2%
15.0 volt models ... Add approximately 1%
0
10
2030
405060
7080
90
100
LOAD (%)
60
65
70
75
80
85
90
EFFICIENCY
(%)
48 VOLT EFFICIENCY Vs. LOAD
LINE = 36VDC
LINE = 48VDC
LINE = 72VDC
36
40
44
48
52
56
60
64
68
72
LINE INPUT(VOLTS)
60
65
70
75
80
85
90
EFFICIENCY(%)
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
100% FULL LOAD
50% FULL LOAD
0
1020
30405060
7080
LINE INPUT (VOLTS)
0.0
0.2
0.4
0.6
0.8
1.0
INPUT
CURRENT
(AMPS)
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% LOAD
50% LOAD
10
100
1000
10000
100000
1000000
FREQUENCY (Hz)
.01
.1
1
OUTPUT
IMPEDANCE
(OHMS)
OUTPUT IMPEDANCE Vs. FREQUENCY
0
20
40
60
80
100
120
140
OUTPUT LOAD (%)
0
20
40
60
80
100
120
NORMALIZED
OUTPUT
(%)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
CURRENT LIMIT MODE ->