6 Watt Single Series DC/DC Converters
Features
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Low Profile Copper Case (0.375" High)
Six-Sided Shielded Case
Low Input/Output Noise Operation
500 VDC Minimum Input to Output Isolation
Output Overvoltage Clamp
Fixed Frequency Operation Independent of
Line and Load
Highly Regulated/Low Drift Output
Rugged High Speed MOSFET Power Chopper
5 Year Warranty
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Description
These 6 Watt Single Output DC/DC converters are suitable for
telecommunications and industrial control applications that
call for direct PCB mounting.
The converters in this series are designed with an LC input
filter, a MOSFET push-pull power chopper, and an isolation
transformer. A linear post regulator provides excellent line
and load regulation.
Noise is reduced by housing each unit in a six-sided
shielded copper case. The CALEX 5 Year Warranty covers
all converters in this series.
Model
12S5.1000
12S12.500
12S15.400
24S5.1000
24S12.500
24S15.400
28S5.1000
28S12.500
28S15.400
48S5.1000
48S12.500
48S15.400
Selection Chart
Input Range
VDC
Min
Max
11.16
13.20
11.16
13.20
11.16
13.20
22.32
26.40
22.32
26.40
22.32
26.40
26.04
30.80
26.04
30.80
26.04
30.80
44.64
52.80
44.64
52.80
44.64
52.80
Output
VDC
5.0
12.0
15.0
5.0
12.0
15.0
5.0
12.0
15.0
5.0
12.0
15.0
Output
mA
1000
500
400
1000
500
400
1000
500
400
1000
500
400
6 Watt Single Output Series Block Diagram
ISOLATION
TRANSFORMER
LOW
VOLTAGE
CURRENT
LIMIT
A
3 + OUTPUT
+ INPUT 1
- INPUT 2
LC
INPUT
FILTER
FIXED
FREQUENCY
POWER
DRIVER
LOW TC
REFERENCE
C
1
D
1
5 CMN
Output
C1
D1
5
12
15
47µF
22µF
22µF
6.8V
N/A
N/A
SIX-SIDED SHIELDED COPPER CASE
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
1
3/2001
6 Watt Single Series DC/DC Converters
Input Parameters*
Model
Voltage Range (13)
Reflected Ripple (2), 0-20MHz bw
Input Current Full Load
No Load
Efficiency
Switching Frequency
Maximum Input Overvoltage, 100ms
No Damage
Turn-on Time, 1% Output Error (3)
Recommended Fuse
Model
Voltage Range
Reflected Ripple (2), 0-20MHz bw
Input Current Full Load
No Load
Efficiency
Switching Frequency
Maximum Input Overvoltage, 100ms
No Damage
Turn-on Time, 1% Output Error (3)
Recommended Fuse
MIN
MAX
TYP
MAX
TYP
TYP
TYP
TYP
MAX
TYP
35
1
Slow Blow Type (4)
28S5.1000
28S12.500
26.04
30.80
3
10
318
19
67
MIN
MAX
TYP
MAX
TYP
TYP
TYP
TYP
MAX
TYP
28S15.400
15
1
Slow Blow Type (4)
48S5.1000
48S12.500
44.64
52.80
10
20
190
16
66
48S15.400
Units
VDC
mA P-P
185
17
68
mA
%
kHz
60
VDC
ms
12S5.1000
12S12.500
11.16
13.20
7
15
740
43
68
12S15.400
24S5.1000
24S12.500
22.32
26.40
5
10
370
23
68
24S15.400
Units
VDC
mA P-P
360
27
69
mA
%
kHz
30
VDC
ms
700
43
60
720
54
69
55
330
20
63
288
19
62
309
21
69
55
170
16
60
Output Parameters*
Model
Output Voltage
Rated Load (5)
Voltage Range
100% Load
Load Regulation 0-100% Load
Line Regulation
Vin = Min-Max VDC
Short Term Stability (6)
Long Term Stability
Transient Response (7)
Dynamic Response (8)
Input Ripple Rejection (9)
Noise, 0-20MHz bw (2)
Temperature Coefficient
Overvoltage Clamp (10)
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
120
12S5.1000
28S5.1000
24S5.1000
48S5.1000
12S12.500
28S12.500
24S12.500
48S12.500
12S15.400
28S15.400
24S15.400
48S15.400
Units
VDC
mA
VDC
%
%
%
5
0
1000
4.95
5.00
5.05
12
0
500
11.90
12.00
12.10
0.02
0.15
0.02
0.10
0.02
0.20
20
55
60
10
40
50
200
-
15
0
400
14.90
15.00
15.10
A
50
%/kHrs
µs
mV peak
dB
mV P-P
ppm/°C
-
VDC
6.8
Short Term, 1 Minute Maximum (4)
NOTES
measured at Tc=25°C,
*
All parameters load unless otherwisenominal input voltage
and full rated
noted. Refer to the
CALEX Application Notes for the definition of terms,
measurement circuits and other information.
(2) Noise is measured per CALEX Application Notes.
(3) Turn-on time is defined as the time from the application of power
until the output is within 1% of its final value.
(4)
(5)
(6)
For long term short circuit protection of the converters, install a
slow blow fuse in the input circuit. Choose a fuse size that is
125% of your applications actual input current and does not
exceed 115% of the full load input current.
No minimum load required.
Short term stability is specified after a 30 minute warm-up at full
load, and with constant line, load and ambient conditions.
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
2
3/2001
6 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
Units
MIN
TYP
700
75
-25
80
-40
85
-55
90
10
1.7
MS6, MS8, MS15
VDC
pF
MIN
MAX
MIN
Case Functional Range (11)
MAX
MIN
Storage Range
MAX
Thermal Impedance (12)
TYP
General
TYP
°C
°C
°C
°C/Watt
oz
BOTTOM VIEW
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
Seal around terminals is not hermetic. Do not immerse units in any
liquid.
SIDE VIEW
Unit Weight
Chassis Mounting Kits
(7)
After a 100% step change of the load, the output voltage will be
within 1% of the final value within the transient response time.
(8) Dynamic response is the peak overshoot voltage during the
transient response time defined in note 7 above.
(9) The input ripple rejection is specified for DC to 120Hz ripple with
a modulation amplitude of 1% Vin.
(10) For module protection only, see also Note 4.
(11) 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.
Pin
1
2
3
5
Function
+INPUT
-INPUT
+OUTPUT
CMN
(12) The Case Thermal Impedance is specified as the case
temperature rise over ambient per package watt dissipated.
(13) Input voltage range is 10.56 - 15.60 VDC when total output
power is 3 watts or less.
(14) Specifications subject to change without notice.
Typical Performance: (Tc = 25°C; Full Rated Load).
12S5.1000 EFFICIENCY Vs. LINE INPUT
70
70
12S15.400 EFFICIENCY Vs. LINE INPUT
0.8
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
EFFICIENCY (%)
65
EFFICIENCY (%)
65
INPUT CURRENT (AMPS)
100% FULL LOAD
0.6
100% FULL LOAD
50% FULL LOAD
60
100% FULL LOAD
60
0.4
A
50% FULL LOAD
4
6
8
10
12
14
55
0.2
50% FULL LOAD
55
11.0
11.5
12.0
12.5
13.0
13.5
50
11.0
11.5
12.0
12.5
13.0
13.5
0.0
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
24S5.1000 EFFICIENCY Vs. LINE INPUT
70
80
24S15.400 EFFICIENCY Vs. LINE INPUT
0.40
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% FULL LOAD
EFFICIENCY (%)
65
EFFICIENCY (%)
75
INPUT CURRENT (AMPS)
100% FULL LOAD
0.30
100% FULL LOAD
70
0.20
50% FULL LOAD
60
50% FULL LOAD
65
50% FULL LOAD
0.10
55
22
23
24
25
26
27
60
22
23
24
25
26
27
0.00
10
15
20
25
30
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
OPERATING RANGE
LINE INPUT (VOLTS)
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
3
3/2001
6 Watt Single Series DC/DC Converters
Typical Performance: (Tc = 25°C; Full Rated Load).
28S5.1000 EFFICIENCY Vs. LINE INPUT
75
80
28S15.400 EFFICIENCY Vs. LINE INPUT
0.30
28 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
EFFICIENCY (%)
EFFICIENCY (%)
70
75
INPUT CURRENT (AMPS)
100% FULL LOAD
100% FULL LOAD
65
0.20
100% FULL LOAD
70
50% FULL LOAD
0.10
50% FULL LOAD
60
50% FULL LOAD
65
55
26
27
28
29
30
31
60
26
27
28
29
30
31
0.00
10
15
20
25
30
35
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
OPERATING RANGE
48S5.1000 EFFICIENCY Vs. LINE INPUT
70
80
48S15.400 EFFICIENCY Vs. LINE INPUT
0.20
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
100% FULL LOAD
65
75
INPUT CURRENT (AMPS)
EFFICIENCY (%)
EFFICIENCY (%)
0.15
100% FULL LOAD
60
100% FULL LOAD
70
0.10
50% FULL LOAD
65
50% FULL LOAD
55
50% FULL LOAD
60
0.05
50
44
46
48
50
52
54
55
44
46
48
50
52
54
0.00
25
30
35
40
45
50
55
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
24S5.1000 EFFICIENCY Vs. LOAD
75
80
24S15.400 EFFICIENCY Vs. LOAD
1
OUTPUT IMPEDANCE Vs. FREQUENCY
LINE = 22.32VDC
65
LINE = 22.32VDC
EFFICIENCY (%)
EFFICIENCY (%)
70
IMPEDANCE (OHMS)
LINE = 24VDC
LINE = 26.4VDC
LINE = 24VDC
LINE = 26.4VDC
60
.1
15V OUTPUT
55
5V OUTPUT
.01
45
50
35
0
20
40
60
80
100
40
0
20
40
60
80
100
.001
10
100
1K
10K
100K
1M
LOAD (%)
LOAD (%)
FREQUENCY (Hz)
A
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
4
3/2001
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