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SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW2-5 SERIES DC-DC CONVERTER
www.DataSheet4U.com
z RATED 2-5W OUTPUT
z HIGH POWER DENSITY
z SINGLE&DUAL OUTPUT
z INDUSTRIAL STANDARD PIN-OUT
z NO HEAT SINK REQUIRED
z 1K VDC ISOLATION
z WIDE INPUT21
z REGULATED OUTPUT
z PCB MOUNTING
z OVER CURRENT&SHORT CIRCUIT PROTECTION
The DW2-5 series DC-DC converter offers 2-5 watts regulated power from a 24 PIN international standard DIP package. The series are especially
designed for the application of telecommunication, industry control, instrumentation and measurements. With its features, the product can be used
where the wider input, regulated output and isolation needed.
ELECTRICAL SPECIFICATIONS
All specifications tested typically @ 25°C, humidity<75%, nominal input and rated output unless otherwise noted.
OUTPUT SPECIFICATIONS
Items:
Testing condition
Output accuracy:
At full load and nominal Vin
Output power:
Full load
Line regulation:
Input voltage from low to high
Load regulation:
Single Vout
From 10% to full load
Dual Vout
Ripple and noise:
20MHz bandwidth
Temperature drift
Minimum load
Switching frequency
Over load protection
% of FL at nominal input
Short circuit protection
Min Typ
10% 2W-5W
400KHz
120
Continuous and automatic recovery
Max
±2%
full load120%
0.5%
0.5%
2%
50mVp-p
0.03 %/°C
10%
INPUT SPECIFICATIONS
Items:
Testing condition
5VDC
Input voltage range
12VDC
24VDC
48VDC
Input filter
Start-up time
Nominal Vin and certain load
Min
Pi
Typ
4.5-9VDC
9-18VDC
18-36VDC
36-72VDC
100mS
Max
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
Printed in P.R.C January 2007 Page 1 of 5

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SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW2-5 SERIES DC-DC CONVERTER
wwCwO.DMataMShOeNet4SUP.cEomCIFICATIONS
Items
Min Typ.
Operating temperature range
-40°C
Storage temperature range
-55°C
Humidity
Cooling
Free Air Convection
Isolation voltage (VDC)
Isolation resistance (ohms)
Input to Output
1,000
109
Isolation capacitance (pF)
Efficiency (%)
See Product List
70
Case material
Non-conductive black copper
Potting material
Epoxy Resin UL94-V0
Packing material
Tube
Dimension (mm / inch)
25.40*25.40*10.14 (1.00*1.00*0.40)
Weight (g)
MTBF (Hrs)
14
106
PRODUCT LIST
Part Number
Input Voltage (VDC)
Range
Nominal
DW5-12S33
12
DW5-12S05
12
DW5-12S12
12
DW5-12S15
9-18
12
DW5-12D05
12
DW5-12D12
12
DW5-12D15
12
DW5-24S33
24
DW5-24S05
24
DW5-24S12
24
DW5-24S15
18-36
24
DW5-24D05
24
DW5-24D12
24
DW5-24D15
24
DW5-48S3R3
48
DW5-48S05
48
DW5-48S12
48
DW5-48S15
DW5-48D24
36-72
48
48
DW5-48D05
48
DW5-48D12
48
DW5-48D15
48
Output
Current (mA) Voltage (VDC)
1100
3.3
1000
5
417 12
333 15
±500
±5
±208
±12
±167
±15
1100
3.3
1000
5
417 12
333 15
±500
±5
±208
±12
±167
±15
1100
3.3
1000
5
417 12
333 15
±100
±24
±500
±5
±208
±12
±167
±15
Efficiency
(%, Typ.)
70
78
80
80
78
80
80
70
80
80
80
78
80
80
70
78
80
80
80
78
80
80
Package
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
Max
+85°C
+125°C
<75%
30
80
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Dual Output
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
Printed in P.R.C January 2007 Page 2 of 5

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SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW2-5 SERIES DC-DC CONVERTER
wwPwR.DOaDtaUShCeeTt4LUI.cSoTm
Part Number
Input Voltage (VDC)
Range
Nominal
Output
Current (mA)
Voltage (VDC)
Efficiency
(%, Typ.)
Package
DW2-12S33
12 667 3.3 70 DIP
DW2-12S05
12
400 5
78 DIP
DW2-12S12
12
167 12
80 DIP
DW2-12S15
DW2-12D05
9-18
12
12
133
±200
15
±5
80 DIP
78 DIP
DW2-12D12
12
±84 ±12
80 DIP
DW2-12D15
12
±67 ±15
80 DIP
DW2-24S33
24 667 3.3 70 DIP
DW2-24S05
24
400 5
80 DIP
DW2-24S12
24
167 12
80 DIP
DW2-24S15
18-36
24
133 15
80 DIP
DW2-24D05
24
±200
±5
78 DIP
DW2-24D12
24
±84 ±12
80 DIP
DW2-24D15
24
±67 ±15
80 DIP
DW2-48S33
48 667 3.3 70 DIP
DW2-48S05
48
400 5
78 DIP
DW2-48S12
48
167 12
80 DIP
DW2-48S15
36-72
48
133 15
80 DIP
DW2-48D05
48
±200
±5
78 DIP
DW2-48D12
48
±84 ±12
80 DIP
DW2-48D15
48
±67 ±15
80 DIP
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
PRODUCT LIST
Part Number
Input Voltage (VDC)
Range Nominal Max.
DW3-12S33
12
DW3-12S05
12
DW3-12S12
12
DW3-12S15
9-18
12
DW3-12D05
12
DW3-12D12
12
DW3-12D15
12
DW3-24S33
24
DW3-24S05
24
DW3-24S12
24
DW3-24S15
18-36
24
DW3-24D05
24
DW3-24D12
24
DW3-24D15
24
DW3-48S33
36-72
48
DW3-48S05
48
DW3-48S12
48
DW3-48S15
48
DW3-48D05
48
Output
Current (mA)
Voltage (VDC)
909 3.3
600 5
250 12
200 15
±300
±5
±125
±12
±100
±15
909 3.3
600 5
250 12
200 15
±300
±5
±125
±12
±100
±15
909 3.3
600 5
250 12
200 15
±300
±5
Efficiency
(%, Typ.)
70
78
80
80
78
80
80
70
80
80
80
78
80
80
70
78
80
80
78
Package
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
DIP
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Single Output
Single Output
Single Output
Single Output
Dual Output
Dual Output
Dual Output
Single Output
Single Output
Single Output
Single Output
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
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SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW2-5 SERIES DC-DC CONVERTER
DW3-48D12
www.DataSheet4U.com
DW3-48D15
48
±125
±12
80 DIP
48
±200
±15
80 DIP
Dual Output
Dual Output
Note:(1) A minimum 10% load is required on the output to meet the published specifications. Even though working at no load condition will not
damage the device, it is not adoptable.
(2) If the output power needed is smaller than rated, please connect a proper value resistor at output end in parallel to increase the load or
contact us for a lower power product.
(3) For lower noise and ripple, please use a “LC” filter network at the output. The capacitance must be at proper value in case of start-up
problems.
CONNECTING DC-DC CONVERTERS IN SERIES
Galvanic isolation of the output allows multiple converters to be connected in series simply by connecting the positive output of one converter to the
negative of another (see figure 1). In this way, non-standard voltage rails can be generated, however, the current output of the highest output voltage
converter should not be exceeded. When converters are connected in series, additional filtering is strongly recommended as the converters switching
circuits are not synchronized. As well as a summation of the ripple voltages, the output could also produce relatively large beat frequencies. A
capacitor across the output will help, as will a series inductor.
CONNECTING DC-DC CONVERTERS IN PARALLEL
If the available power output from a single converter is inadequate for the application, then multiple converters can be paralleled to produce a higher
output power. However, it is not recommended to parallel converters to generate a higher power output, please select our higher power output
modules or contact us for a customized solution.
It should be noted that it is always preferable to parallel multiple converters of the same type. For instance, if a 2.5W converter is required, then
either 2pcs AxxxxS-2W should be used or 3 AxxxxS-1W, not an AxxxxS-2W and an AxxxxS-1W. The reason for this is that the output voltages are
not sufficiently well matched to guarantee that an AxxxxS-2W would supply twice as much as an AxxxxS-1W and the situation would occur where
there was only 1W being drawn from the AxxxxS-2W and 1.5W from AxxxxS-1W. Even with paralleled converters of the same type, loading will
be uneven, however, there is only likely to be around a 10% difference in output load when the output voltages are well matched.
When connecting converter outputs, it should be remembered that the switching will not be synchronous, hence some form of coupling should be
employed. One possible solution is to use a diode feed, this is suitable mainly for 12V and 15V output types only where the diode voltage drop
(typically 0.6V) will not significantly affect the circuit functionality (see figure 2). With 5V and 9V supplies the diode drop is generally too large to
consider as a suitable means of connecting paralleled converters. This method also has a beat frequency that will superimpose itself over the ripple
of the two converters, this can be reduced by using an external capacitor at the paralleled output. The preferred method of connecting converters in
parallel is via series inductors on the output (see figure 3). This configuration not only has a lower loss of voltage than the diode method, but by
suitable choice of inductor and an additional external capacitor, the beat frequency can be significantly reduced, as will the ripple from each
converter. Suitable values are given in the table below (see table 1), these typically reduce the beat and ripple frequencies by a factor of 10.
ISOLATION
One of the main features of the majority of Sunyuan components DC-DC converters is the high galvanic isolation capability. This allows several
variations on circuit topography by using a single DC-DC converter. The basic input to output isolation can be used to provide either a simple
isolated output power source, or to generate different voltage rails and /or dual polarity rails. These configurations are most often found in data
processing, instrumentation and other noise sensitive circuits where it is necessary to isolate the load and noise presented to the local power supply
rails from that of an entire system. Usually local supply noise appears as common mode noise at the converter and does not pollute the main system
power supply rails. The isolated positive output can be connected to the input ground rail to generate a negative supply rail if required. Since the
output is isolated from the input the choice of reference for the output side can be relatively arbitrary, for example an additional single rail can be
generated above the main supply rail or offset by some other DC value.
Regulated converters need more consideration than the unregulated type for mixing the reference level. Essentially the single supply rail has a
regulator in its positive output rail only, hence referring the isolated ground will only work if all the current return is through the DC-DC and not via
other external components, such as diode bias, resistor feed. Have an alternative return path can upset the regulation and the performance of the
system may not equal that of the converter. In one word, the isolation features are to generate two completely independent power supply but also
united perfectly through the modern technology. This has been widely used in the application of mixed circuits, A/D, D/A and other circuits that are
sensitive to noise.
FILTERING
All Sunyuan isolated DC-DC Converters have a fixed characteristic frequency at which the device operates. This fixed frequency allows filtering
that is relatively simple compared to pulse-skipping types. In a pulse-skipping converter a large range of frequencies are encountered as the device
adjusts the pulse interval for loading conditions.
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
Printed in P.R.C January 2007 Page 4 of 5

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SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW2-5 SERIES DC-DC CONVERTER
NwwOwM.DEatNaSChLeeAt4TUU.cRomE
TEMPERATURE DERATING GRAPH
120
100
80
60
Safe Operating Area
40
20
0
-40 0
40 71 85
Operating Temp (Celsius)
120
TYPICAL CONNECTION
+Vin
Cin
GND
DC-DC
CONVERTER Cout2
Dual Output
+Vo +Vin
Cin
0V
GND
-Vo
DC-DC
CONVERTER
Single Output
+Vo
0V
OUTLINE DIMENSION
PINS DESCRIPTION
Single Output
Vin
GND
+Vo
Omitted
0V
Pin
1
2
3
4
5
Dual Output
Vin
GND
+Vo
0V
-Vo
SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
3F, 3Bldg, Duoli Industrial Zone,
Meihua Rd. Futian District,
Shenzhen 518049, China
Tel: +86-755-83100080
Fax: +86-755-83116652
Email: sales02@szsunyuan.com
www.szsunyuan.com
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
Printed in P.R.C January 2007 Page 5 of 5