12 Watt Single Series DC/DC Converters
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.
Selection Chart
Model
24S5.2000
24S12.1000
24S15.800
48S5.2000
48S12.1000
48S15.800
Input Range
VDC
MIN
MAX
9.00
9.00
9.00
24.00
24.00
24.00
36.00
36.00
36.00
72.00
72.00
72.00
Output
VDC
5.0
12.0
15.0
5.0
12.0
15.0
Output
mA
2000
1000
800
2000
1000
800
12 Watt Single Series Block Diagram
PWM FEEDBACK
LOW VOLTAGE
FOLDBACK
CURRENT LIMIT
A
C1
D1
3 + OUTPUT
+ INPUT 1
5
CMN
- INPUT 2
SHIELDED
ISOLATION
TRANSFORMER
Output
C1
D1
5
12
470µF
220µF
220µF
6.8V
15V
18V
SIX-SIDED SHIELDED STEEL CASE
15
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
STCO# 970521-3, #970624-3, #990316-1
LC
INPUT
FILTER
PWM
CONTROL
LOW TC
REFERENCE
12 Watt Single Series DC/DC Converters
Input Parameters*
Model
Voltage Range
Reflected Ripple, 0-20MHz bw
Input Current Full Load
No Load
Efficiency
Switching Frequency
Maximum Input Overvoltage, 100ms
No Damage
Turn-on Time, 1% Output Error
Recommended Fuse
MIN
MAX
TYP
MAX
TYP
TYP
TYP
TYP
MAX
TYP
(2)
40
60
24S5.2000 24S12.1000
24S15.800
9.00
36.00
20
45
720
40
70
909
80
48S5.2000 48S12.1000
48S15.800
24.00
72.00
15
30
360
24
Units
VDC
mA P-P
mA
%
kHz
VDC
ms
Output Parameters*
Model
Output Voltage
Rated Load (3)
Voltage Range
100% Load
Load Regulation 0-100% Load
Line Regulation
Vin = Min-Max VDC
Short Term Stability (4)
Long Term Stability
Transient Response (5)
Dynamic Response (6)
Input Ripple Rejection (7)
Noise, 0-20MHz bw
Temperature Coefficient
Overvoltage Clamp (8)
Short Circuit Protection to
Common for all Outputs
MIN
MAX
MIN
TYP
MAX
TYP
MAX
TYP
MAX
TYP
TYP
TYP
TYP
TYP
TYP
MAX
TYP
MAX
TYP
30
24S5.2000
48S5.2000
5
0
2000
4.95
5.00
5.05
24S12.1000
48S12.1000
12
0
1000
11.90
12.00
12.10
0.02
0.05
0.02
0.05
0.05
0.3
20
20
60
10
40
120
200
15
20
24S15.800
48S15.800
15
0
800
14.90
15.00
15.10
Units
VDC
mA
VDC
%
%
%
%/kHrs
µs
mV peak
dB
mV P-P
ppm/°C
18
VDC
6.8
Continuous, 8 Hours Minimum Current Limit
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
STCO# 970521-3, #970624-3, #990316-1
NOTES:
*
All parameters measured at Tc=25°C, 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 µSec).
(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.
A
12 Watt Single Series DC/DC Converters
General Specifications*
All Models
Isolation
Isolation Voltage
10µA Leakage
Input-Output
Input to Output
Capacitance
Environmental
Case Operating Range
No Derating
Case Functional Range (9)
Storage Range
Thermal Impedance (10)
General
Unit Weight
Mounting Kits
Agency Approvals
Units
MIN
TYP
500
120
VDC
pF
MIN
MAX
MIN
MAX
MIN
MAX
TYP
TYP
-25
80
-40
85
-55
100
6
6.5
UL 1459
°C
°C
°C
°C/Watt
oz
MK215-022 & MK215-08BDV
BOTTOM VIEW
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
Pin
1
2
3
4
5
Function
+INPUT
-INPUT
+OUTPUT
N/C
CMN
SIDE VIEW
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
24S15.800 EFFICIENCY Vs LINE INPUT
73
72
73
72
76
48S15.800 EFFICIENCY Vs LINE INPUT
100% FULL LOAD
74
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
71
70
69
68
67
66
71
70
69
100% FULL LOAD
72
70
50% FULL LOAD
68
67
66
68
50% FULL LOAD
66
A
60
70
80
64
1
12
14
16
18
20
22
24
26
28
30
32
34
36
20
30
40
50
9
12
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
60
55
EFFICIENCY (%)
60
55
EFFICIENCY (%)
50
45
40
35
30
LINE = 24VDC
LINE = 48VDC
LINE = 72VDC
50
45
40
35
30
LINE = 24VDC
LINE = 48VDC
LINE = 72VDC
0
20
40
60
80
100
0
20
40
60
80
100
LOAD (%)
LOAD (%)
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
STCO# 970521-3, #970624-3, #990316-1
48S5.2000 EFFICIENCY Vs LOAD
48S5.2000 EFFICIENCY Vs LOAD
12 Watt Single Series DC/DC Converters
Typical Performance (Tc=25°C, Vin=Nom VDC, Rated Load).
24S INPUT CURRENT Vs LINE INPUT VOLTAGE
2.5
1.2
48S INPUT CURRENT Vs LINE INPUT VOLTAGE
INPUT CURRENT (AMPS)
2.0
INPUT CURRENT (AMPS)
1.0
0.8
1.5
100% FULL LOAD
1.0
0.6
100% FULL LOAD
0.4
0.5
0.2
50% FULL LOAD
0.0
0
5
10
15
20
25
30
35
40
0.0
0
10
20
30
40
50% FULL LOAD
50
60
70
80
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
120
48S15.800 OUTPUT VOLTAGE Vs. CASE TEMPERATURE
0.10
1
OUTPUT IMPEDANCE Vs. FREQUENCY
NORMALIZED OUTPUT (%)
0.08
OUTPUT VOLTAGE (%)
80
0.06
IMPEDANCE (OHMS)
-30
-20
-10
0
10
20
30
40
50
60
70
80
100
.1
60
0.04
40
0.02
.01
20
0.00
0
0
20
40
60
80
100
120
140
160
-0.02
.001
10
100
1K
10K
100K
1M
OUTPUT LOAD (%)
CASE TEMPERATURE (Deg C)
FREQUENCY (Hz)
A
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
STCO# 970521-3, #970624-3, #990316-1
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