A
30 Watt XW Dual Series DC/DC Converters
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
eco# 041007-1
DOUBLE SHIELDED
ISOLATION
TRANSFORMER
THERMAL SHUTDOWN
PI
INPUT
FILTER
VOLTAGE
FEED
FORWARD
PWM
ISOLATED
FEEDBACK
LOW TC
BAND GAP
REFERENCS
SIX-SIDED SHIELDED COPPER CASE
100F
47F
100F
47F
1 MEG || 0.01 F
3
4
5
1
2
8
+ INPUT
- INPUT
ON/OFF
+ OUTPUT
CMN
- OUTPUT
Features
30 Watts of Output Power from Either
or Both Outputs
2:1 Extra Wide Input Range
High, Nearly Constant Efficiency (81-88%)
500 VDC Minimum Input To Output Isolation
Short Circuit Protection
Resettable Thermal Overload Circuit
Overvoltage Protection for Input and Outputs
No Derating to 80C Case Temperature
5 Year Warranty
30 Watt XW Dual Series Block Diagram
Description
These dual output converters are designed for wide input
range, low noise telecommunications, industrial control and
instrument applications. The extra wide input range (2:1) is
ideal for battery or unregulated input applications.
These converters are state-of-the-art 80 kHz MOSFET
based designs that provide outstanding line and load
regulation.
The dual outputs are regulated with a high loop gain
feedback control method that provides linear regulator type
performance with a true, high efficiency switching DC/DC
topology. The large amount of loop gain insures excellent
input ripple rejection and line transient response.
Outstanding line and load regulation are achieved over the
full input voltage range and over the specified load current
range.
Also included is a logic (open collector TTL / CMOS
compatible) shutdown pin to control converter operation.
The XW Dual Series is protected from output shorts to
common by a high speed pulse by pulse digital current limit
circuit and a resettable thermal shut down circuit.
The outputs and input are overvoltage protected.
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A
30 Watt XW Dual Series DC/DC Converters
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
eco# 041007-1
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(or use the supplied
curves) and then adding 20 to 25 percent to get the desired fuse
size.
(3)
Maximum output power is 30 Watts. This power can be drawn
from any output combination so long as the sum of both outputs
power never exceeds 30 Watts (i.e. one output can draw 0 Amps
and the other can draw twice it's rated full load current).
Regulation degrades with substantial unbalance. Minimum load
is required for proper regulation only; no module damage is
sustained if run at less than minimum load.
(4)
Cross regulation is defined as the change in one output when the
other output is changed from minimum to maximum load.
(5)
Short term stability is specified after a 30 minute warm-up atfull
load.
(6)
Transient response is defined as the time for the output to settle
from a 25 to 75 % step load change to a 1% error band (rise time
of step = 2 Sec).
(7)
Dynamic response is defined as the peak overshoot during a
transient as defined in note 6 above.
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30 Watt XW Dual Series DC/DC Converters
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
eco# 041007-1
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BOTTOM VIEW
SIDE 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.
0
10
20
30
40
50
60
70
80
90
100
LOAD (%)
70
75
80
85
90
EFFICIENCY (%)
12D EFFICIENCY Vs. LOAD
Vin = 9VDC
Vin = 12VDC
Vin = 18VDC
0
10
20
30
40
50
60
70
80
90
100
LOAD (%)
70
75
80
85
90
EFFICIENCY (%)
24D EFFICIENCY Vs. LOAD
Vin = 18VDC
Vin = 24VDC
Vin = 36VDC
0
10
20
30
40
50
60
70
80
90
100
LOAD (%)
70
75
80
85
90
EFFICIENCY (%)
48D EFFICIENCY Vs. LOAD
Vin = 36VDC
Vin = 48VDC
Vin = 72VDC
Typical Performance (Tc=25C, Full Rated Load).
(8)
The input ripple rejection is specified for DC to 120 Hz ripple with
a modulation amplitude of 1% of Vin.
(9)
For module protection only, see also note 2.
(10) The logic shutdown pin is Open Collector TTL, CMOS, and relay
compatible. The input to this pin is referenced to -input (pin 2)
and is protected to +100 VDC.
(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.
(12) The case thermal impedance is specified as the case temperature
rise over ambient per package watt dissipated.
(13) 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
30 Watt XW Dual Series DC/DC Converters
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
eco# 041007-1
Typical Performance (Tc=25C, Full Rated Load).
9
10
11
12
13
14
15
16
17
18
LINE INPUT (VOLTS)
70
75
80
85
90
EFFICIENCY (%)
12D EFFICIENCY Vs. LINE INPUT
50% RATED LOAD
100% RATED LOAD
36
40
44
48
52
56
60
64
68
72
LINE INPUT (VDC)
70
75
80
85
90
EFFICIENCY (%)
48D EFFICIENCY Vs. LINE INPUT
50% RATED LOAD
100% RATED LOAD
18
20
22
24
26
28
30
32
34
36
LINE INPUT (VOLTS)
70
75
80
85
90
EFFICIENCY (%)
24D EFFICIENCY Vs. LINE INPUT
50% RATED LOAD
100% RATED LOAD
7
8
9
10
11
12
13
14
15
16
17
18
LINE INPUT VOLTAGE
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
INPUT CURRENT (AMPS)
12D INPUT CURRENT Vs. LINE INPUT
50% RATED LOAD
100% RATED LOAD
32
36
40
44
48
52
56
60
64
68
72
LINE INPUT (VOLTS)
0.00
0.25
0.50
0.75
1.00
1.25
INPUT CURRENT (AMPS)
48D INPUT CURRENT Vs. LINE INPUT
50% RATED LOAD
100% RATED LOAD
12
14
16
18
20
22
24
26
28
30
32
34
36
LINE INPUT (VOLTS)
0.0
0.5
1.0
1.5
2.0
2.5
INPUT CURRENT (AMPS)
24D INPUT CURRENT Vs. LINE INPUT
50% RATED LOAD
100% RATED LOAD
0
10
20
30
40
50
60
70
80
90
100
LOAD (%)
-1.0
-0.5
0.0
0.5
1.0
NORMALIZED OUTPUT (%)
CROSS REGULATION Vs. LOAD
OUTPUT WITH LOAD VARIED
OUTPUT HELD AT 100% FULL LOAD
-30
-20
-10
0
10
20
30
40
50
60
70
80
CASE TEMPERATURE (DEG C)
-0.5
-0.4
-0.3
-0.2
-0.1
-0.0
0.1
0.2
0.3
NORMALIZED OUTPUT (%)
OUTPUT VOLTAGE Vs. CASE TEMPERATURE
0
25
50
75
100
125
150
175
200
225
250
LOAD (%)
0
10
20
30
40
50
60
70
80
90
100
110
NOMINAL OUTPUT (%)
OUTPUT VOLTAGE Vs. LOAD
CONSTANT CURRENT MODE
"HICK-UP" MODE
FREQUENCY (Hz)
ATTENUATION (dB)
LINE TO OUTPUT TRANSFER FUNCTION
-40
-45
-50
-55
-50
10
100
1K
10K
100K
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ohms)
OUTPUT IMPEDANCE Vs. FREQUENCY
NEGATIVE OUTPUT
POSITIVE OUTPUT
1.0
0.1
10
100
1K
10K
100K
1M
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