MSIW1000 Series
3W, Wide Input Range SMD, Single & Dual Output DC/DC Converters
Key Features
y
y
y
y
y
y
y
y
y
y
Efficiency up to 83%
1500VDC Isolation
MTBF > 1,000,000 Hours
2:1 Wide Input Range
UL1950 Safety Approval
Short Circuit Protection
Temperature Performance -40] to +71]
Industry Standard Pinout
UL 94V-0 Package Material
Internal SMD Construction
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.
SMD
Low Profile
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
1500
VDC
systems and industrial robot systems.
The modules have a maximum power rating of 3W and a typical full-load
$
2:1
efficiency of 83%, continuous short circuit, 50mV output ripple, built-in filtering
I/O Isolation
for both input and output minimize the need for external filtering.
Low Cost
Wide Range
The MSIW1000 units are available in tape and reel package.
Block Diagram
Single Output
+Vin
Dual Output
+Vo
LC
Filter
+Vin
+Vo
LC
Filter
Com.
-Vo
-Vin
1
PFM
Isolation
Ref.Amp
-Vo
-Vin
MINMAX
PFM
Isolation
Ref.Amp
REV:0 2005/04
MSIW1000 Series
Model Selection Guide
Model
Number
Input
Voltage
Output
Voltage
VDC
VDC
Max.
mA
Min.
mA
@Max. Load
mA (Typ.)
MSIW1021
3.3
700
70
257
75
MSIW1022
5
600
60
316
79
MSIW1023
12
250
25
305
15
200
20
305
{5
{300
{30
321
78
MSIW1026
{12
{125
{12.5
309
81
MSIW1027
{15
{100
{10
309
81
MSIW1031
3.3
700
70
127
76
MSIW1032
5
600
60
156
80
MSIW1033
12
250
25
151
83
12
( 9 ~ 18 )
MSIW1024
MSIW1025
MSIW1034
24
( 18 ~ 36 )
Output Current
Input Current
Reflected
Ripple
Current
@No Load
mA (Typ.)
mA (Typ.)
Efficiency
@Max. Load
% (Typ.)
82
20
15
200
20
151
{300
{30
158
79
MSIW1036
{12
{125
{12.5
152
82
MSIW1037
{15
{100
{10
152
82
MSIW1041
3.3
700
70
63
76
MSIW1042
5
600
60
78
80
12
250
25
75
15
200
20
75
{5
{300
{30
79
79
MSIW1046
{12
{125
{12.5
76
82
MSIW1047
{15
{100
{10
76
82
MSIW1043
MSIW1044
MSIW1045
48
( 36 ~ 75 )
83
83
3
10
83
Notes :
Absolute Maximum Ratings
Parameter
Input Surge Voltage
( 1000 mS )
15
82
{5
MSIW1035
5
25
12VDC Input Models
Min.
Max.
Unit
-0.7
25
VDC
24VDC Input Models
-0.7
50
VDC
48VDC Input Models
-0.7
100
VDC
Lead Temperature (1.5mm from case for 10 Sec.)
---
260
]
Internal Power Dissipation
---
2,500
mW
Exceeding the absolute maximum ratings of the unit could cause damage.
These are not continuous operating ratings.
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
Environmental Specifications
Conditions
Min.
Max.
Unit
Operating Temperature
Parameter
Ambient
-40
+71
]
Operating Temperature
Case
-40
+90
]
Storage Temperature
-40
+125
]
Humidity
---
95
%
Cooling
REV:0 2005/04
6. Other input and output voltage may be available,
please contact factory.
7. Specifications subject to change without notice.
Free-Air Convection
MINMAX
2
MSIW1000 Series
Input Specifications
Parameter
Start Voltage
Under Voltage Shutdown
Model
Min.
12V Input Models
4.5
6
8
24V Input Models
8
12
18
Max.
Unit
48V Input Models
16
24
36
12V Input Models
---
---
8
24V Input Models
---
---
16
48V Input Models
---
---
32
---
---
0.5
A
---
---
1500
mW
Reverse Polarity Input Current
Short Circuit Input Power
Typ.
All Models
Input Filter
VDC
Pi Filter
Output Specifications
Parameter
Conditions
Output Voltage Accuracy
Min.
Typ.
Max.
Unit
%
---
{0.5
{1.0
Dual Output, Balanced Loads
---
{0.5
{2.0
%
Line Regulation
Vin=Min. to Max.
---
{0.1
{0.3
%
Load Regulation
Io=10% to 100%
---
{0.3
{1.0
%
---
50
75
mV P-P
Output Voltage Balance
Ripple & Noise (20MHz)
---
---
100
mV P-P
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Over Line, Load & Temp.
---
---
10
mV rms
Over Power Protection
120
---
---
%
Transient Recovery Time
---
200
500
uS
25% Load Step Change
Transient Response Deviation
Temperature Coefficient
Output Short Circuit
---
{2
{6
%
---
{0.01
{0.02
%/]
Continuous
General Specifications
Parameter
Conditions
Min.
Typ.
Max.
Unit
Isolation Voltage Rated
60 Seconds
1500
---
---
VDC
Isolation Voltage Test
Flash Tested for 1 Second
1650
---
---
VDC
Isolation Resistance
500VDC
1000
---
---
M[
Isolation Capacitance
100KHz,1V
---
65
100
pF
---
300
---
KHz
1000
---
---
K Hours
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
Capacitive Load
Models by Vout
3.3V
5V
12V
15V
{5V #
{12V #
{15V #
Unit
Maximum Capacitive Load
4700
4700
4700
4700
180
180
180
uF
# For each output
3
MINMAX
REV:0 2005/04
MSIW1000 Series
Input Fuse Selection Guide
12V Input Models
750mA Slow - Blow Type
24V Input Models
48V Input Models
350mA Slow - Blow Type
200mA Slow - Blow Type
Input Voltage Transient Rating
150
140
130
120
48VDC Input Models
110
Vin ( VDC )
100
90
80
70
24VDC Input Models
60
50
40
12VDC Input Models
30
20
10
0
10uS
REV:0 2005/04
100uS
1mS
MINMAX
10mS
100mS
4
100
100
90
90
Efficiency (%)
Efficiency (%)
MSIW1000 Series
80
70
60
80
70
60
50
Low
Nom
50
High
Low
Nom
Input Voltage (V)
Efficiency vs Input Voltage ( Dual Output )
90
90
80
80
70
70
Efficiency (%)
Efficiency (%)
Efficiency vs Input Voltage ( Single Output )
60
50
60
50
40
40
30
30
20
10
20
40
High
Input Voltage (V)
60
80
100
20
Load Current (%)
10
20
40
60
80
100
Load Current (%)
Efficiency vs Output Load ( Single Output )
Efficiency vs Output Load ( Dual Output )
100
100LFM
400LFM
Natural
convection
200LFM
Output Power (%)
80
60
40
20
0
〜
-40
50
60
70
80
Ambient Temperature
90
100
110
]
Derating Curve
5
MINMAX
REV:0 2005/04
MSIW1000 Series
Test Configurations
Overcurrent Protection
Input Reflected-Ripple Current Test Setup
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 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.
To Oscilloscope
+
+
Battery
+Vin
Lin
Cin
-Vin
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.
+Out
DC / DC
Converter
Current
Probe
Load
-Out
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.
+Vin
+Out
Single Output
DC / DC
Converter
-Vin
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.
+
DC Power
Source
Copper Strip
Cout
Input Source Impedance
Scope
+Vin
+
DC / DC
Converter
Load
Cin
-
Resistive
Load
+Out
-Vin
-Out
-Out
Output Ripple Reduction
+Vin
+Out
Dual Output
DC / DC
Converter
Com.
-Vin
-Out
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.
Copper Strip
Cout
Scope
Cout
Scope
Resistive
Load
+
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.
MINMAX
Cout
-
-Vin
-Out
+
+Vin
+Out
Dual Output
DC / DC Com.
Converter
DC Power
Source
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.
+Out
Single Output
DC / DC
Converter
DC Power
Source
Design & Feature Considerations
REV:0 2005/04
+Vin
-
-Vin
-Out
Load
Cout
Load
6
MSIW1000 Series
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.
Position of air velocity
probe and thermocouple
15mm / 0.6in
7
50mm / 2in
Air Flow
DUT
MINMAX
REV:0 2005/04
MSIW1000 Series
Mechanical Dimensions
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
17.82 [0.702]
2
3
10 11 12
27.94mm
18.8 [0.74]
1
16.1 [0.63]
TOP
14.8 [0.58]
15 14 13
24 23 22
2.8mm
20.0mm
2.54 [0.100]
0.5 [0.020]
10.2 [0.40]
32.3 [1.27]
Side
Tolerance
Pin
0.5 [0.02]
2.2 [0.09]
2.54mm
17.78mm
1.0mm
0.15
Millimeters
Inches
X.X{0.25
X.XX{0.01
X.XX{0.13
{0.05
X.XXX{0.005
{0.002
Pin Connections
Physical Characteristics
Pin
Single 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
32.3*14.8*10.2 mm
Case Size
:
Case Material
:
Non-Conductive Black Plastic
Weight
:
5.75g
Flammability
:
UL94V-0
1.27*0.58*0.40 inches
NC: No Connection
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.
REV:0 2005/04
MINMAX
8