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 12 Watt Dual Series DC/DC Converters
Features
Low Noise Output LC Type Input Filter Six-Sided Shielded Steel Case Very Wide Input Voltage Ranges (9-36, 18-54, and 24-72) High Efficiency Operation Long Term Output Fault Survival 5 Year Warranty
Description
These 10 and 12 Watt Dual Output DC/DC converters are designed for telecommunications, medical or industrial 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. This provides for very low noise and ultra stable output voltages.
Selection Chart
Model 24D12.500 24D15.400 28D5.1000 48D12.500 48D15.400 Input Range VDC MIN MAX 9.00 9.00 18.00 24.00 24.00 36.00 36.00 54.00 72.00 72.00 Outputs VDC 12.0 15.0 5.0 12.0 15.0 Outputs mA 500 400 1000 500 400
12 Watt Dual Series Block Diagram
PWM FEEDBACK
CROSS COUPLED FOLDBACK CURRENT LIMIT
3 + OUTPUT
A
+ INPUT 1 - INPUT 2 LC INPUT FILTER PWM CONTROL LOW TC REFERENCE
100F
4 CMN
100F CROSS COUPLED FOLDBACK CURRENT LIMIT
5 - OUTPUT
SHIELDED ISOLATION TRANSFORMER SIX-SIDED SHIELDED STEEL CASE
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
4/8/99, STCO #970624-2, STCO #990408-1, eco# 041007-1
12 Watt Dual 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 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 28D5.1000 18.00 54.00 20 50 600 40 60 87 60 60 (2) MIN MAX TYP MAX TYP TYP TYP TYP MAX TYP 24D12.500 9.00 36.00 20 45 710 40 70 100 40 60 (2) 48D12.500 24.00 72.00 15 30 360 24 70 100 80 350 24 48D15.400 Units VDC mA P-P mA % kHz VDC ms 700 40 24D15.400 Units VDC mA P-P mA % kHz VDC ms
Output Parameters*
MODEL Output Voltage Rated Current (3) Voltage Range 100% Load Output Balance (Plus to Minus Output, Full 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 Short Circuit Protection to Common for all Outputs
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.
28D5.1000 5 0 +1100/-900 4.95 5.00 5.05
MIN MAX MIN TYP MAX TYP MAX TYP MAX TYP MAX TYP TYP TYP TYP TYP TYP MAX TYP MAX
0.05 0.10
24D12.500 48D12.500 12 0 500 11.90 12.00 12.10 0.6 1.0 0.02 0.07 0.02 0.07 0.02 0.3 20 20 60 10 40 50 150
24D15.400 48D15.400 15 0 400 14.90 15.00 15.10
Units VDC mA VDC %
0.02 0.07
% % % %/kHrs s mV peak dB mV P-P
A
100 300
50 150
ppm/C
Continuous, 8 Hours Minimum Current Limit
(3) (4) (5)
(6)
No minimum load required. Short term stability is specified after a 30 minute warm-up at full load. Transient response is defined as the time for the output to settle from a 100% step load change to a 1% error band (rise time of step = 2Sec). Dynamic response is defined as the peak overshoot during a transient as defined in note 5 above.
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
4/8/99, STCO #970624-2, STCO #990408-1, eco# 041007-1
12 Watt Dual Series DC/DC Converters
General Specifications *
All Models Isolation Isolation Voltage 10A Leakage Input-Output Input to Output Capacitance Environmental Case Operating Range No Derating Case Functional Range (8) Storage Range Thermal Impedance (9) General Unit Weight Mounting Kits (7) TYP 6.5 oz MK215-022 & MK215-08BDV Units
MIN TYP
500 120
VDC pF
MIN MAX MIN MAX MIN MAX TYP
-25 80 -40 85 -55 100 6
C C C C/Watt
BOTTOM VIEW
SIDE VIEW
The input ripple rejection is specified for DC to 120Hz ripple with a modulation amplitude of 1% of Vin. (8) 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. (9) The case thermal impedance is specified as the case temperature rise over ambient per package watt dissipated. (10) 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.
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 CMN -OUTPUT
Typical Performance (Tc=25C, Full Rated Load).
24D15.400 EFFICIENCY Vs. LINE INPUT 72 100% FULL LOAD
EFFICIENCY (%)
48D15.400 EFFICIENCY Vs. LINE INPUT 75
A
70 EFFICIENCY (%) 70
100% FULL LOAD
68 50% FULL LOAD 66
65
50% FULL LOAD
64 10 15 20 25 30 35 40 LINE INPUT (VOLTS)
60 20 30 40 50 60 70 80 LINE INPUT (VOLTS)
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
4/8/99, STCO #970624-2, STCO #990408-1, eco# 041007-1
12 Watt Dual Series DC/DC Converters
Typical Performance (Tc=25C, Full Rated Load).
48D15.400 EFFICIECNY Vs. LOAD 80
INPUT CURRENT (AMPS)
2.50
24D INPUT CURRENT Vs. LINE INPUT
70 EFFICIENCY (%) LINE = 24VDC LINE = 48VDC 50 LINE = 72VDC 40
2.00
100% RATED LOAD
1.50
60
1.00
0.50
50% RATED LOAD 30 0 20 40 60 80 100 LOAD (%)
0.00 0 5 10 15 20 25 30 35 40
LINE INPUT (VOLTS)
OUTPUT VOLTAGE Vs CASE TEMPERATURE
0.2 1.2
48D INPUT CURRENT Vs. LINE INPUT
NORMALIZED OUTPUT (%)
0.1
INPUT CURRENT (AMPS)
1.0
0.8
NEGATIVE OUTPUT
0.6
100% RATED LOAD
0.0
0.4
POSITIVE OUTPUT
0.2
50% RATED LOAD
0 10 20 30 40 50 60 70 80
-0.1 -30 -20 -10 0 10 20 30 40 50 60 70 80
0.0
CASE TEMPERATURE (Deg C)
LINE INPUT (VOLTS)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
120 1 100
OUTPUT IMPEDANCE Vs. FREQUENCY
OUTPUT VOLTAGE (%)
80
IMPEDANCE (OHMS)
+ OUTPUT
.1
60
- OUTPUT
40
.01
20
A
.001 10 100 1K 10K 100K 1M
0 0 20 40 60 80 100 120 140 160 180 200
OUTPUT LOAD (%)
FREQUENCY (Hz)
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
4/8/99, STCO #970624-2, STCO #990408-1, eco# 041007-1


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