Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
beta
dyne
15W DC/DC CONVERTER
3:1 Input
Single/Dual/Triple/Dual Positive Output
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 1 OF 6
1
2
3
4
15D3.3-5/48
MADE IN USA
9
8
7
6
5
DC/DC
CONVERTER
beta
dyne
+V AUX
-V AUX
+V
-V
4
3
7
9
2
1
OPTO
ISOLATOR
IN
IN
PWM &
SWITCHING
TRANSISTOR
REF
FILTER
&
RECTIFIER
ERROR
AM
OUT
OUT
SYNC
ON/OFF
FILTER
RECTIFIER
&
+V MAIN
-V MAIN
8
5
OUT
OUT
MAIN
AUX
Functional Description
The 15W series is a family of single, dual and triple DC/DC converters. It offers
3:1 input voltage range, 400kHz switching frequency, forward topology and is
packaged in a 1"×2"×0.395" case with an industry standard pin out arrange-
ment. Synchronous rectification improves the efficiency in the single models
while the dual isolated output in the dual models offers design flexibility. Six-
sided shielding, SMD and improved thermal techniques guarantee reliability.
Key Features
•3:1 input voltage range
•Efficiency up to 88%
•Input to output isolation
•Soft start
•Short circuit protection
•150µA off-state current
•Multiple converter synchronization
•Dual isolated output
•Output O.V.P. protection
Typical Block Diagram (Triple Output)
Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 2 OF 6
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Electrical Specifications
INPUT SPECIFICA TIONS
GENERAL SPECIFICATIONS
OUTPUT SPECIFICATIONS
Unless otherwise specified, all parameters are given under typical +25°C
with nominal input voltage and under full output load conditions.
Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 3 OF 6
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10
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14
16
15
FREE AIR
FORCED AIR
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ENVIRONMENT AL SPECIFICA TIONS
PHYSICAL CHARACTERISTICS
1. Maximum output current must not exceed 2 amps at either output.
NOTES
15W SINGLE
TABLE 1. Minimum input operating voltage range
for 24VIN and 48VIN models
FIGURE 1. Worst case derating of 15W series
EXTERNAL SYNCHRONIZATION
Our 15W DC/DC converters can be synchronized to an ex-
ternal TTL or CMOS clock signal. Insert a 470pf to 1000pF ce-
ramic capacitor between the driving clock signal and the SYNC
pin (Pin 2) of the convertor. The frequency of the signal must be
To trim the output voltage DOWN, connect a 5% ¼W resis-
tor between the + (plus) output and trim pin of the converter. To
trim the output voltage UP, connect a 5% ¼W resistor between the
– (minus) output and trim pins of the converter. For UP/DOWN
trimming capability, connect a 10kW potentiometer between the +
and – output pins, with the wiper arm connected to the trim pin.
The trim resistors/potentiometer can be connected at the con-
verter output pins or the load. However, if connected at the load,
between 390kHz and 430kHz, with a duty cycle of 50% and an
amplitude between 3Vdc minimum and 5Vdc typical. See Applica-
tion Note DC-005: Synchronization.
the resistance of the runs becomes part of the feedback network
which improves load regulation. If the load is some distance from
the converter , the use of #20 gauge wire is recommended to avoid
excessive voltage drop due to the resistance of the circuit paths.
See our application notes:
DC-001: Testing Transient Response in DC/DC Converters
DC-004: Thermal Consideration for DC/DC Converters
EXTERNAL TRIMMING OF OUTPUT VOLTAGES (SINGLE AND DUAL ONLY)
Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 4 OF 6
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42/21S51 42 03-01 01 077 021 21 0521 18
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84/8.1S518406-0202732098.1000597
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84/51D518406-02037630951-/51+005±58
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42/51-5T51 42 03-01 01 187 021 51±/5 052/0051 08
84/5-3.3T51 84 06-02 02 563 09 5±/3.3 057/0002 28
84/21-5T518406-02010730921±/5213/005158
84/51-5T51 84 06-02 01 373 09 51±/5 052/0051 48
Model Selection Guide
Please contact Beta Dyne for different input voltage range and output voltage combinations
* Measured with 10µF capacitor at the input power pins
15 _ ___/___-_
ORDERING GUIDE
Insert an I for dual independent outputs
Input Voltage
Output Voltage
Power
Number of Outputs (S = Single, D = Dual, T = Triple)
I
Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 5 OF 6
VOUT
(MAIN)
+
-
TO
100 F
1000 F
1000 F
500V
µ
µ
ρ500V
1000 F
ρ
1000 F
500Vρ
OFF
ON
2.5 S
500 S
ηµ
1000 F
ρ
3.3 H @ 3A
µ
+
-
VIN
F1
****
**
TYPICAL CONNECTION DIAGRAM OF A 15W SINGLE CONVERTER
** OPTIONAL PARTS
**
SYNC
ON/OFF
+V
1
2
3
(BOTTOM VI EW )
IN
5
6
7
-V IN
4+V OUT
OUT
-V
15W SINGLE SERI ES
ADJ
V
50V
0.1 F
µ10K
100V
10 F
µ
+
-
35V
100 F
1000 F
500V
µ
ρ500V
1000 F
ρ
1000 F
500Vρ
OFF
ON
2.5 S
500 S
ηµ
1000 F
ρ
3.3 H @ 3A
µ
+
-
VIN
F1
****
**
TYPICAL CONN EC TION DI AGRAM OF A 15W DUAL CONVERT ER
** OPTI ONAL PART S
**
50V
0.1 F
µ10K
SYNC
ON/OFF
+V
1
2
3
(BOTTOM VIEW)
IN
5
6
7
-V IN
4VADJ
GND
15W DUAL SERIES
OUT
+V
GND 8
OUT
-V 9
100 F
35V
** µ
+
100V
10 F
µ
+
-
35V
100 F
1000 F
500V
µ
ρ500V
1000 F
ρ
1000 F
500Vρ
OFF
ON
2.5 S
500 S
ηµ
1000 F
ρ
3.3 H @ 3A
µ
+
-
VIN
F1
****
**
TYPICAL CONNECTION DI AGRAM OF A 15W DUAL ISOLATED OUTPUTS CONVERTE R
** OPTIONAL PARTS
**
50V
0.1 F
µ10K 100 F
35V
** µ
+
SYNC
ON/OFF
+V
1
2
3
(BOTTOM VIEW)
IN
5
6
7
-V IN
4VADJ
15W DUAL-ISOLATED OUTPUT SERIES
OUT2
+V
8
OUT1
-V 9
OUT2
-V
OUT1
+V
-
V AUX.
OUT2
V MAIN
OUT1
100V
10 F
µ
+V AUX
SYNC
ON/OFF
+V
1
2
3
(BOTTOM VIEW)
IN
5
6
7
8
9
OUT
-V IN
4
-V AUX
OUT
+5VOUT
N/C
OUT
-V
15W TRIPLE SERIES
VOUT
+
-
TO
100 F
1000 F
1000 F
500V
µ
µ
ρ500V
1000 F
ρ
1000 F
500Vρ
OFF
ON
2.5 S
500 S
ηµ
1000 F
ρ
3.3 H @ 3A
µ
+
-
VIN
F1
****
**
TYPICAL CONNECTION DIAGRAM OF A 15W TRIPLE CONVERTER
** OPTIONAL PARTS
**
+
-
AUX
AUX
MAIN
MAIN
10 F
100V
µ
FIGURE 2. Single converter
FIGURE 3. Dual converter
FIGURE 4. Dual isolated output converter
FIGURE 5. Triple converter
Beta Dyne, Inc. · 110 Elm St, Unit 12 · Bridgewater, MA 02324 · Phone 508-697-1993 · Fax 508-697-2045 · www.beta-dyne.com
15W DC/DC CONVERTER DCDC15_DS_REV03.PDF SHEET 6 OF 6
25% 50% 75% 100% MAIN
-10
-5
AUX.
+5
+10
+15
-15
0V
+VAX
MAIN I IN %
O
DUAL ISOLATED OUTPUTS
NOM.
% VARIATION OF NOMINAL AUX. VOLTAGE
= 25% OF V AUX.
= 50%
= 75%
= 100%
O
25% 50% 75% 100% MAIN
-2
-1
+AUX NOM
+1
+2
+3
-3
0V
+VAX
MAIN OUTPUT CURRENT IN %
POSITIVE AUX. OUTPUT
= 50%
= 100%
= 25%
= 75%
+4
+6
+5
+7
-4
-5
-6
% VARIATION FROM THE NOMINAL
+5
-AUX NOM
-2
-6
-5
-4
-3
-1
+1
+4
+3
+2
+7
+6
-VAX
% VARIATION FROM THE NOMINAL
NEGATIVE AUX. OUTPUT
LOAD
+8
+8
AUX
0.10 0 [2 .54]
1.80 0 [4 5.72 ]
2.00 0 [5 0.80 ]
0.40 0 [1 0.16 ]
0.60 0 [1 5.24 ]
0.800
[20.32]
0.20 0 [5 .08]
0.100
[2.54]
0.300
[7.62]
0.500
[12.70]
0.700
[17.78]
1
2
3
4
9
8
7
6
BOTTOM VIEW
5
0.900
[22.86]
Ø0.040 [1.02] (9PL)
0.39 5 [1 0.0 3] MAX
0.10 [2.54] MIN
CASE
HEADER
niP noitcnuF
1FFO/NO
2CNYS
3V-
NI
4V+
NI
5TUPTUO+
6TUPTUO-
7V+
JDA
8niPoN
9niPoN
niP noitcnuF
1FFO/NO
2CNYS
3V-
NI
4V+
NI
5V
JDA
6DNG
7TUPTUO+
8DNG
9TUPTUO-
niP noitcnuF
1FFO/NO
2CNYS
3V-
NI
4V+
NI
5V
JDA
6V+
1O
)NIAM(
7V+
2O
)XUA(
8V-
2O
)XUA(
9V-
1O
)NIAM(
niP noitcnuF
1FFO/NO
2CNYS
3V-
NI
4V+
NI
5V+
TUO
NIAM
6niPoN
7V+
TUO
XUA
8DNG
9V-
TUO
XUA
FIGURE 7. Graph of typical load regulation of a triple output.
Variation in % of ±VAUX vs. Main output loading.
FIGURE 6. Graph of typical load regulation of a dual
isolated output. Variation in % of VAUX vs. Main output
loading.
DIMENSIONS
in inches [mm]
15W SINGLE 15W DUAL 15W DUAL ISOLATED 15W TRIPLE
