A
12 Watt Single Series DC/DC Converters
STCO# 970521-3, #970624-3, #990316-1
Manufacturing Company, Inc. Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
1
3/16/99, eco# 041007-1, 060601-3
Features
UL Recognized
Low Noise Output
LC Type Input Filter
Six-Sided Shielded Steel Case
Very Wide Input Voltage Ranges
(9-36, and 24-72)
High Efficiency Operation
Long Term Output Fault Survival
5 Year Warranty
Description
These 12 Watt Single Output DC/DC converters are designed
for telecommunications, industrial controls, medical equipment
and instrumentation systems. The converters feature very
wide input voltage ranges.
The converter consists of a hi-speed chopper circuit using
state-of-the-art MOSFET technology, isolation transformer,
and high regulation linear post regulator. These provide very
low noise and ultra stable output voltages.
12 Watt Single Series Block Diagram
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LC
INPUT
FILTER
PWM
CONTROL
PWM FEEDBACK
LOW VOLTAGE
FOLDBACK
CURRENT LIMIT
SHIELDED
ISOLATION
TRANSFORMER
LOW TC
REFERENCE
1
2
3
5
+ OUTPUT
CMN
+ INPUT
- INPUT
C1
D1
SIX-SIDED SHIELDED STEEL CASE
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1
A
12 Watt Single Series DC/DC Converters
STCO# 970521-3, #970624-3, #990316-1
Manufacturing Company, Inc. Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
2
3/16/99, eco# 041007-1, 060601-3
NOTES:
*
All parameters measured at Tc=25C, nominal input voltage
and full rated load unless otherwise noted. Refer to the
CALEX Application Notes for the definition of terms,
measurement circuits and other information.
(2)
Determine the correct fuse size by calculating the maximum DC
current drain at low line input, maximum load then adding 20 to
25 percent. Slow blow type recommended.
(3)
No minimum load required.
(4)
Short term stability is specified after a 30 minute warm-up at full
load.
(5)
Transient response is defined as the time for the output to settle
from 100% step load change to a 1% error band (rise time of step
=2 Sec).
(6)
Dynamic response is defined as the peak overshoot during a
transient as defined in note 5 above.
(7)
The input ripple rejection is specified for DC to 120Hz ripple with
a modulation amplitude of 1% of Vin.
(8)
For module protection only, with use of external fuse on input
circuit, see note 2.
(9)
The functional temperature range is intended to give an additional
data point for use in evaluating this power supply. At the low
functional temperature the power supply will function with no
side effects, however sustained operation at the high functional
temperature will reduce expected operational life. The data
sheet specifications are not guaranteed over the functional
temperature range.
(10) The case thermal impedance is specified as the case temperature
rise over ambient per package watt dissipated.
(11) Water Washability - Calex DC/DC converters are designed to
withstand most solder/wash processes. Careful attention should
be used when assessing the applicability in your specific
manufacturing process. Converters are not hermetically sealed.
*
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A
12 Watt Single Series DC/DC Converters
STCO# 970521-3, #970624-3, #990316-1
Manufacturing Company, Inc. Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
3
3/16/99, eco# 041007-1, 060601-3
12
14
16
18
20
22
24
26
28
30
32
34
36
LINE INPUT (VOLTS)
66
67
68
69
70
71
72
73
EFFICIENCY (%)
24S15.800 EFFICIENCY Vs LINE INPUT
50% FULL LOAD
100% FULL LOAD
n
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+
4
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/
N
5
N
M
C
20
30
40
50
60
70
80
LINE INPUT (VOLTS)
64
66
68
70
72
74
76
EFFICIENCY (%)
48S15.800 EFFICIENCY Vs LINE INPUT
50% FULL LOAD
100% FULL LOAD
Typical Performance (Tc=25C, Vin=Nom VDC, Rated Load).
0
20
40
60
80
100
LOAD (%)
30
35
40
45
50
55
60
EFFICIENCY (%)
48S5.2000 EFFICIENCY Vs LOAD
LINE = 24VDC
LINE = 48VDC
LINE = 72VDC
0
20
40
60
80
100
LOAD (%)
30
35
40
45
50
55
60
EFFICIENCY (%)
48S5.2000 EFFICIENCY Vs LOAD
LINE = 24VDC
LINE = 48VDC
LINE = 72VDC
BOTTOM VIEW
SIDE VIEW
Mechanical tolerances unless otherwise noted:
X.XX dimensions: 0.020 inches
X.XXX dimensions: 0.005 inches
*
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2
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K
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9
5
4
1
L
U
12
1
66
67
68
69
70
71
72
73
EFFICIENCY (%)
9
A
12 Watt Single Series DC/DC Converters
STCO# 970521-3, #970624-3, #990316-1
Manufacturing Company, Inc. Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
4
3/16/99, eco# 041007-1, 060601-3
Typical Performance (Tc=25C, Vin=Nom VDC, Rated Load).
0
5
10
15
20
25
30
35
40
LINE INPUT (VOLTS)
0.0
0.5
1.0
1.5
2.0
2.5
INPUT CURRENT (AMPS)
24S INPUT CURRENT Vs LINE INPUT VOLTAGE
100% FULL LOAD
50% FULL LOAD
0
10
20
30
40
50
60
70
80
LINE INPUT (VOLTS)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
INPUT CURRENT (AMPS)
48S INPUT CURRENT Vs LINE INPUT VOLTAGE
50% FULL LOAD
100% FULL LOAD
0
20
40
60
80
100
120
140
160
OUTPUT LOAD (%)
0
20
40
60
80
100
120
OUTPUT VOLTAGE (%)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
-30
-20
-10
0
10
20
30
40
50
60
70
80
CASE TEMPERATURE (Deg C)
-0.02
0.00
0.02
0.04
0.06
0.08
0.10
NORMALIZED OUTPUT (%)
48S15.800 OUTPUT VOLTAGE Vs. CASE TEMPERATURE
FREQUENCY (Hz)
.001
.01
.1
1
IMPEDANCE (OHMS)
OUTPUT IMPEDANCE Vs. FREQUENCY
10
100
1K
10K
100K
1M
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