Dual Output
+Vo
PFM Isolation Ref.Amp
LC
Filter
+Vin
-Vin
Com.
-Vo
Single Output
PFM Isolation Ref.Amp
LC
Filter
+Vin
-Vin
-Vo
+Vo
Block Diagram
Wide Range
2:1
Low Cost
$
I/O Isolation
1500
VDC
Low ProfileSMD

Minmax's MSIW1000 3W DC/DC's are in "gull-wing" SMT package and
meet 245]/10sec in solder-reflow for lead free process.
The series consists of 21 models that operate over input voltage ranges of
9-18VDC, 18-36VDC and 36-75VDC which provide precisely regulated
output voltages of 3.3V, 5V, 12V, 15V, {5V, {12V and {15VDC.
The -40] to +71] operating temperature range makes it ideal for data
communication equipments, mobile battery driven equipments, distributed
power systems, telecommunication equipments, mixed analog/digital
subsystems, process/machine control equipments, computer peripheral
systems and industrial robot systems.
The modules have a maximum power rating of 3W and a typical full-load
efficiency of 83%, continuous short circuit, 50mV output ripple, built-in filtering
for both input and output minimize the need for external filtering.
The MSIW1000 units are available in tape and reel package.
yInternal SMD Construction
yUL 94V-0 Package Material
yIndustry Standard Pinout
yTemperature Performance -40] to +71]
yShort Circuit Protection
yUL1950 Safety Approval
y2:1 Wide Input Range
yMTBF > 1,000,000 Hours
y1500VDC Isolation
yEfficiency up to 83%
Key Features
3W, Wide Input Range SMD, Single & Dual Output DC/DC Converters
MSIW1000 Series
REV:0 2005/04
MINMAX
1
8276{10{100{15MSIW1047
8276{12.5{125{12MSIW1046
7979{30{300{5MSIW1045
83752020015MSIW1044
83752525012MSIW1043
8078606005MSIW1042
76
103
63707003.3
48
( 36 ~ 75 )
MSIW1041
82152{10{100{15MSIW1037
82152{12.5{125{12MSIW1036
79158{30{300{5MSIW1035
831512020015MSIW1034
831512525012MSIW1033
80156606005MSIW1032
76
155
127707003.3
24
( 18 ~ 36 )
MSIW1031
81309{10{100{15MSIW1027
81309{12.5{125{12MSIW1026
78321{30{300{5MSIW1025
823052020015MSIW1024
823052525012MSIW1023
79316606005MSIW1022
75
2520
257707003.3
12
( 9 ~ 18 )
MSIW1021
% (Typ.)mA (Typ.)mA (Typ.)mA (Typ.)mAmAVDCVDC
@Max. Load@No Load@Max. LoadMin.Max.
EfficiencyReflected
Ripple
Current
Input CurrentOutput CurrentOutput
Voltage
Input
Voltage
Model
Number
Model Selection Guide
Free-Air ConvectionCooling
%95---Humidity
]+125-40Storage Temperature
]+90-40CaseOperating Temperature
]+71-40AmbientOperating Temperature
UnitMax.Min.ConditionsParameter
Environmental Specifications
Exceeding the absolute maximum ratings of the unit could cause damage.
These are not continuous operating ratings.
mW2,500---Internal Power Dissipation
]260---Lead Temperature (1.5mm from case for 10 Sec.)
VDC100-0.748VDC Input Models
VDC50-0.724VDC Input Models
VDC25-0.712VDC Input Models
Input Surge Voltage
( 1000 mS )
UnitMax.Min.Parameter
Notes :
1. Specifications typical at Ta=+25], resistive load,
nominal input voltage, rated output current unless
otherwise noted.
2. Transient recovery time is measured to within 1%
error band for a step change in output load of 75%
to 100%.
3. These power converters require a minimum
output loading to maintain specified regulation.
4. Operation under no-load conditions will not
damage these modules; however, they may not
meet all specifications listed.
5. All DC/DC converters should be externally fused at
the front end for protection
6. Other input and output voltage may be available,
please contact factory.
7. Specifications subject to change without notice.
Absolute Maximum Ratings
MSIW1000 Series
2
MINMAX
REV:0 2005/04
K Hours------1000MIL-HDBK-217F @ 25], Ground BenignMTBF
KHz---300---Switching Frequency
pF10065---100KHz,1VIsolation Capacitance
M[------1000500VDCIsolation Resistance
VDC------1650Flash Tested for 1 SecondIsolation Voltage Test
VDC------150060 SecondsIsolation Voltage Rated
UnitMax.Typ.Min.ConditionsParameter
General Specifications
ContinuousOutput Short Circuit
%/]{0.02{0.01---Temperature Coefficient
%{6{2---Transient Response Deviation
uS500200---
25% Load Step Change
Transient Recovery Time
%------120Over Power Protection
mV rms10------Ripple & Noise (20MHz)
mV P-P100------Over Line, Load & Temp.Ripple & Noise (20MHz)
mV P-P7550---Ripple & Noise (20MHz)
%{1.0{0.3---Io=10% to 100%Load Regulation
%{0.3{0.1---Vin=Min. to Max.Line Regulation
%{2.0{0.5---Dual Output, Balanced LoadsOutput Voltage Balance
%{1.0{0.5---Output Voltage Accuracy
UnitMax.Typ.Min.ConditionsParameter
Output Specifications
Pi FilterInput Filter
mW1500------Short Circuit Input Power
A0.5------
All Models
Reverse Polarity Input Current
32------48V Input Models
16------24V Input Models
8------12V Input Models
Under Voltage Shutdown
36241648V Input Models
1812824V Input Models
VDC
864.512V Input Models
Start Voltage
UnitMax.Typ.Min.ModelParameter
Input Specifications
# For each output
uF1801801804700470047004700Maximum Capacitive Load
Unit{15V #{12V #{5V #15V12V5V3.3VModels by Vout
Capacitive Load
MSIW1000 Series
REV:0 2005/04
MINMAX
3
200mA Slow - Blow Type350mA Slow - Blow Type750mA Slow - Blow Type
48V Input Models24V Input Models12V Input Models
Input Fuse Selection Guide
Vin ( VDC )
10uS
150
140
130
120
110
100
90
80
70
60
100uS 1mS 10mS 100mS
50
40
30
20
10
0
48VDC Input Models
24VDC Input Models
12VDC Input Models
Input Voltage Transient Rating
MSIW1000 Series
4
MINMAX
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Derating Curve
]
Ambient Temperature
Output Power (%)
0
20
40
60
80
100
-40 50 60 80 100 110
9070
400LFM
200LFM
100LFM
Natural
convection
Efficiency vs Output Load ( Dual Output )Efficiency vs Output Load ( Single 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
Efficiency vs Input Voltage ( Dual Output )Efficiency vs Input Voltage ( Single Output )
50
60
70
80
90
100
Efficiency (%)
Input Voltage (V)
NomLow High
50
60
70
80
90
100
Efficiency (%)
Input Voltage (V)
NomLow High
MSIW1000 Series
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MINMAX
5
Test Configurations
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor
Lin (4.7uH) and Cin (220uF, ESR < 1.0[ at 100 KHz) to
simulate source impedance.
Capacitor Cin, offsets possible battery impedance.
Current ripple is measured at the input terminals of the
module, measurement bandwidth is 0-500 KHz.
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.47uF ceramic capacitor.
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.
Design & Feature Considerations
Maximum Capacitive Load
The MSIW1000 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.
For optimum performance we recommend 180uF
maximum capacitive load for dual outputs and 4700uF
capacitive load for single outputs.
The maximum capacitance can be found in the data sheet.
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.
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.
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 power module helps
ensure stability of the unit, it is recommended to use a good
quality low Equivalent Series Resistance (ESR < 1.0[ at 100
KHz) capacitor of a 3.3uF for the 12V input devices and a
1.5uF for the 24V and 48V devices.
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.
MSIW1000 Series
6
MINMAX
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+Out
-Out
+Vin
-Vin
DC / DC
Converter Load
Battery
+ Lin+
Cin
To Oscilloscope
Current
Probe
+Out
-Out
+Vin
-Vin
Dual Output
DC / DC
Converter
Resistive
Load
Scope
Copper Strip
Cout
Com.
Scope
Cout
+Out
-Out
+Vin
-Vin
Single Output
DC / DC
Converter
Resistive
Load
Scope
Copper Strip
Cout
+
+Out
-Out
+Vin
-Vin
DC / DC
Converter Load
DC Power
Source
+
-
Cin
+Out
-Out
+Vin
-Vin Load
DC Power
Source
+
-
Cout
Com.
Dual Output
DC / DC
Converter
+Out
-Out
+Vin
-Vin
Load
DC Power
Source
+
-
Cout
Single Output
DC / DC
Converter
Thermal Considerations
Many conditions affect the thermal performance of the
power module, such as orientation, airflow over the module
and board spacing. To avoid exceeding the maximum
temperature rating of the components inside the power
module, the case temperature must be kept below 90°C.
The derating curves were determined from measurements
obtained in an experimental apparatus.
MSIW1000 Series
REV:0 2005/04
MINMAX
7
DUT
Position of air velocity
probe and thermocouple 50mm / 2in Air Flow
15mm / 0.6in
NC: No Connection
+Vin+Vin24
+Vin+Vin23
NCNC22
Common-Vout15
NCNC14
UL94V-0
:Flammability
+Vout+Vout13
-VoutNC12
5.75g
:Weight
NCNC11
CommonNC10
Non-Conductive Black Plastic:Case MaterialNCNC3
-Vin-Vin2
1.27*0.58*0.40 inches-Vin-Vin1
32.3*14.8*10.2 mm
:Case Size
Dual OutputSingle OutputPin
Physical Characteristics
Pin Connections
{0.002{0.05Pin
X.XXX{0.005X.XX{0.13
X.XX{0.01X.X{0.25
InchesMillimetersTolerance
2.54mm 1.0mm
2.8mm
17.78mm
20.0mm
27.94mm
14.8 [0.58]
16.1 [0.63]
18.8 [0.74]
10.2 [0.40]
32.3 [1.27]
0.5 [0.02]
2.2 [0.09]
123 121110
1415 13
24 23 22
0.15
TOP
Side
17.82 [0.702]
2.54 [0.100] 0.5 [0.020]
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Mechanical Dimensions
The MSIW1000 converter is encapsulated in a low thermal resistance molding compound that has excellent resistance/electrical
characteristics over a wide temperature range or in high humidity environments.
The encapsulant and unit case are both rated to UL 94V-0 flammability specifications.
Leads are tin plated for improved solderability.
MSIW1000 Series
8
MINMAX
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