Delphi DSIW1000 Series DC/DC Power
Modules: 12, 24, 48Vin, 3W SMD
The Delphi DSIW1000, 12V, 24V, and 48V 2:1 wide input, single or
dual output, SMD form factor, isolated DC/DC converter is the latest
offering from a world leader in power systems technology and
manufacturing ― Delta Electronics, Inc. The DSIW1000 series
operate from 12V, 24V, or 48V (2:1) and provides 3.3V, 5V, 12V, or
15V of single output or ±5V, ±12V, or ±15V of dual output in an
industrial standard, plastic case encapsulated SMD package. This
series provides up to 3W of output power with 1500V isolation and a
typical full-load efficiency up to 83%. With creative design technology
and optimization of component placement, these converters possess
outstanding electrical and thermal performance, as well as extremely
high reliability under highly stressful operating conditions. APPLICATIONS
Industrial
Transportation
Process/ Automation
Telecom
Data Networking
DATASHEET
DS_DSIW1000_12032008
FEATURES
Efficiency up to 83%
Industry standard form factor and pinout
Case size:
32.3 x14.8 x10.2mm (1.27” x0.58” x0.40”)
Input: 12V, 24V, 48V (2:1)
Output: 3.3, 5, 12, 15, ±5, ±12, ±15V
Low ripple and noise
Short circuit protection
1500V isolation
Mositure Sensitity Level (MSL) 2
UL 94V-0 Package Material
ISO 9001 and ISO14001 certified
manufacturing facility
CSA 60950-1 Recognized
OPTIONS
2
TECHNICAL SPECIFICATIONS
TA = 25°C, airflow rate = 0 LFM, nominal Vin, nominal Vout, resistive load unless otherwise noted.
PARAMETER NOTES and CONDITIONS DSIW1000 (Standard)
Min. Typ. Max. Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Transient 12V input model, 1000ms -0.7 25 Vdc
Transient 24V input model, 1000ms -0.7 50 Vdc
Transient 48V input model, 1000ms -0.7 100 Vdc
Internal Power Dissipation 2500 mW
Operating Temperature Ambient -40 85 °C
Case -40 100 °C
Storage Temperature -40 125 °C
Humidity 95 %
Lead Temperature in Assembly 1.5mm from case for 10 seconds 260 °C
Input/Output Isolation Voltage 1500 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 12V model 9 12 18 Vdc
24V model 18 24 36
48V model 36 48 75 Vdc
Turn-On Voltage Threshold 12V model 4.5 6 8 Vdc
24V model 8 12 18 Vdc
48V model 16 24 36 Vdc
Turn-Off Voltage Threshold 12V model --- --- 8 Vdc
24V model --- --- 16 Vdc
48V model --- --- 32 Vdc
Maximum Input Current Please see Model List table on page 6
No-Load Input Current 12V model 20 mA
24V model 5 mA
48V model 3 mA
Input Reflected Ripple Current 12V model 25 mA
24V model 15 mA
48V model 10 mA
Short Circuit Input Power All models 1.5 W
Reverse Polarity Input Current 0.5 A
OUTPUT CHARACTERISTICS
Output Voltage Set Point Accuracy ±0.5 ±1.0 %
Output Voltage Balance Dual output models ±0.5 ±2.0 %
Output Voltage Regulation
Over Load Io=10% to 100% ±0.3 ±1.0 %
Over Line Vin= min to max ±0.1 ±0.3 %
Over Temperature Tc=-40°C to 100°C ±0.01 ±0.02 %/C
Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 0.47µF ceramic 50 75 mV
Peak-to-Peak, over line, load, temperature Full Load, 0.47µF ceramic 100 mV
RMS Full Load, 0.47µF ceramic 10 mV
Output Over Current/Power Protection Auto restart 120 %
Output Short Circuit Continuous
Output Voltage Current Transient
Step Change in Output Current 25% step change ±2 ±6 %
Settling Time (within 1% Vout nominal) 200 500 uS
Maximum Output Capacitance Single output models 4700 µF
Dual output models, each output 180 µF
EFFICIENCY
100% Load Please see Model List table on page 6
ISOLATION CHARACTERI STICS
Isolation Voltage Input to output, 60 Seconds 1500 Vdc
Isolation Voltage Test Flash Test for 1 seconds 1650 Vdc
Isolation Resistance 500VDC 1000 MΩ
Isolation Capacitance 100KHz, 1V 65 100 pF
FEATURE CHARACTERISTICS
Switching Frequency 300 kHz
GENERAL SPECIFICATIONS
MTBF MIL-HDBK-217F; Ta=25°C, Ground Benign 1 M hours
Weight 8.8 grams
Case Material Non-conductive black plastic
Flammability UL94V-0
Input Fuse 12V model, 750mA slow blown typ
24V model, 350mA slow blown type
48V model, 200mA slow blown type
3
ELECTRICAL CHARACTERISTICS CURVES
50
60
70
80
90
100
Efficiency (%)
Input Voltage (V)
NomLow High
50
60
70
80
90
100
Efficiency (%)
Input Voltage (V)
NomLow High
Figure 1: Efficiency vs. Input Voltage (Single Output) Figure 2: Efficiency vs. Input Voltages (Dual Output)
20
30
40
50
60
70
80
90
Load Current (%)
Efficiency (%)
100
60402010 80
20
30
40
50
60
70
80
90
Load Current (%)
Efficiency (%)
100
60402010 80
Figure 3: Efficiency vs. Output Load (Single Output) Figure 4: Efficiency vs. Output Load (Dual Output)
4
Test Configurations
Input Reflected-Ripple Current Test Setup
+Out
-Out
+Vin
-Vin
DC / DC
Converter Load
Battery
+ Lin+
Cin
To Oscilloscope
Current
Probe
Input reflected-ripple current is measured with a inductor
Lin (4.7uH) and Cin (220uF, ESR < 1.0Ω at 100 KHz) to
simulate source impedance. Capacitor Cin is to offset
possible battery impedance. Current ripple is measured at
the input terminals of the module and measurement
bandwidth is 0-500 KHz.
Peak-to-Peak Output Noise Measurement
Scope measurement should be made by using a BNC
socket, measurement bandwidth is 0-20 MHz. Position the
load between 50 mm and 75 mm from the DC/DC
Converter. A Cout of 0.47uF ceramic capacitor is placed
between the terminals shown below.
+Out
-Out
+Vin
-Vin
Single Output
DC / DC
Converter
Resistive
Load
Scope
Copper Strip
Cout
+Out
-Out
+Vin
-Vin
Dual Output
DC / DC
Converter
Resistive
Load
Scope
Copper Strip
Cout
Com.
Scope
Cout
Design & Feature Considerations
The DSIW1000 circuit block diagrams are shown in
Figures 5 and 6.
PFM Isolation Ref.Amp
LC
Filter
+Vin
-Vin
-Vo
+Vo
Figure 5: Block diagram of DSIW1000 single output
modules.
+Vo
PFM Isolation Ref.Amp
LC
Filter
+Vin
-Vin
Com.
-Vo
Figure 6: Block diagram of DSIW1000 dual output
modules
Input Source Impedance
The power module should be connected to a low ac-
impedance input source. Highly inductive source
impedances can affect the stability of the power module.
+
+Out
-Out
+Vin
-Vin
DC / DC
Converter Load
DC Power
Source
+
-
Cin
In applications where power is supplied over long lines
and output loading is high, it may be necessary to use a
capacitor at the input to ensure startup.
Capacitor mounted close to the input of the power
module helps ensure stability of the unit, it is
recommended to use a good quality low Equivalent
Series Resistance (ESR < 1.0Ω at 100 KHz) capacitor of
a 3.3uF for the 12V input devices, and a 1.5uF for the
24V and 48V devices.
5
Design & Feature Considerations
Maximum Capacitive Load
The DIW1000 series has limitation of maximum
connected capacitance at the output. The power
module may be operated in current limiting mode
during start-up, affecting the ramp-up and the startup
time.
Output Ripple Reduction
A good quality low ESR capacitor placed as close as
practicable across the load will give the best ripple and
noise performance.
To reduce output ripple, it is recommended to use
3.3uF capacitors at the output.
+Out
-Out
+Vin
-Vin
Load
DC Power
Source
+
-
Cout
Single Output
DC / DC
Converter
+Out
-Out
+Vin
-Vin Load
DC Power
Source
+
-
Cout
Com.
Dual Output
DC / DC
Converter
Overcurrent Protection
To provide protection in a fault (output overload)
condition, the unit is equipped with internal current
limiting circuitry and can endure current limiting for an
unlimited duration. At the point of current-limit
inception, the unit shifts from voltage control to current
control. The unit operates normally once the output
current is brought back into its specified range.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly
process before the board or system undergoes electrical
testing. Inadequate cleaning and/or drying may lower the
reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and/or drying is especially important for un-encapsulated
and/or open frame type power modules. For assistance
on appropriate soldering and cleaning procedures,
please contact Delta’s technical support team.
Notes:
1. These power converters require a minimum output load
to maintain specified regulation (please see page 6 for
the suggested minimum load). Operation under no-load
conditions will not damage these modules; however,
they may not meet all specifications listed above.
2. These DC/DC converters should be externally fused at
the front end for protection.
6
THERMAL CONSIDERATIONS
Thermal management is an important part of the
system design. To ensure proper, reliable operation,
sufficient cooling of the power module is needed over
the entire temperature range of the module.
Convection cooling is usually the dominant mode of
heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in
which the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the facing PWB and
PWB is constantly kept at 25.4mm (1’’).
Figure 7: Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit
may be affected.
THERMAL CURVES
DSIW1000series Output Current vs. Ambient Temperature and Air Velocity
(Either Orientation)
0%
20%
40%
60%
80%
100%
120%
25 35 45 55 65 75 85
Ambient Temperature (℃)
Output Power (%)
Natural
Convection
Figure 8: Derating Curve
7
MODEL LIST
INPUT OUTPUT Full Load
Efficiency
Vdc (V) Max (mA) Vdc (V) Max (mA) Min (mA) %
DSIW1021 257 3.3 700 70 75
DSIW1022 316 5 600 60 79
DSIW1023 305 12 250 25 82
DSIW1024 305 15 200 20 82
DSIW1025 321
±5 ±300 ±30 78
DSIW1026 309
±12 ±125 ±12.5 81
DSIW1027 309
±15 ±100 ±10 81
DSIW1031 127 3.3 700 70 76
DSIW1032 156 5 600 60 80
DSIW1033 151 12 250 25 83
DSIW1034 151 15 200 20 83
DSIW1035 158
±5 ±300 ±30 79
DSIW1036 152
±12 ±125 ±12.5 82
DSIW1037 152
±15 ±100 ±10 82
DSIW1041 63 3.3 700 70 76
DSIW1042 78 5 600 60 80
DSIW1043 75 12 250 25 83
DSIW1044 75 15 200 20 83
DSIW1045 79
±5 ±300 ±30 79
DSIW1046 76
±12 ±125 ±12.5 82
DSIW1047 76
±15 ±100 ±10 82
12
(9 ~ 18)
24
(18 ~ 36)
48
(36 ~ 72)
MODEL NAME
8
PACKAGE: TAPE & REEL
9
MECHANICAL DRAWING
24 23
123
22 15 14 13
10 11 12
17.82 [0.70"]
14.8 [0.58"]
16.1 [0.63"]
18.8 [0.74"]
2.54 [0.10"] 0.5 [0.02"]
10.2 [0.40"]
0.5 [0.02"]
2.2 [0.09"]
32.3 [1.27"]
TOP VIEW
SIDE VIEW
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: DCDC@delta-corp.com
Europe:
Phone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: DCDC@delta-es.com
Asia & the rest of world:
Telephone: +886 3 4526107 ext 6220~6224
Fax: +886 3 4513485
Email: DCDC@delta.com.tw
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any
infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any
patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice.
Pin Sin
g
le Output Dual Output
1-Vin -Vin
2-Vin -Vin
3 NC NC
10 NC Common
11 NC NC
12 NC -Vout
13 +Vout +Vout
14 NC NC
15 -Vout Common
22 NC NC
23 +Vin +Vin
24 +Vin +Vin
