MIW1300 Series
3 Watts 3 :1 Wide Input Range DC/DC Converters
Single and Dual Outputs
Key Features
High Efficiency up to 81%
3:1 Input Range
Industry Standard Pinout
SMT Technology
I/O Isolation 1000VDC
Short Circuit Protection
EMI Complies With EN55022 Class A
MTBF > 1,000,000 Hours
MIW1300-Series power modules are low-profile
dc-dc converters that operate over an input voltage range of
10-30VDC and provide precisely regulated output voltages of 5V and
12V in both single and dual output configurations.
The -25] to +75] 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 80%, continuous short circuit, 60mA output
ripple, built-in filtering for both input and output minimizes the need
for external filtering.
$
Low Cost
1000
VDC
I/O Isolation
EMI
EN55022
3:1
Wide Range
Block Diagram
Single Output
Dual Output
+Vin
LC
Filter
+Vo
+Vin
LC
Filter
+Vo
Com.
-Vo
PFM
Isolation
Ref.Amp
PFM
Isolation
Ref.Amp
-Vo
-Vin
-Vin
MIW1300 Series
Model Selection Guide
Model
Number
Input
Voltage
Output
Voltage
Output Current
Input Current
Reflected
Ripple
Current
mA (Typ.)
Efficiency
VDC
MIW1322
MIW1323
MIW1324
MIW1326
MIW1327
VDC
5
12
15
{12
{15
Max.
mA
600
250
200
{125
{100
Min.
mA
60
25
20
{12.5
{10
@Max. Load
mA (Typ.)
188
188
188
188
188
@No Load
mA (Typ.)
@Max. Load
% (Typ.)
80
80
80
80
80
20
( 10 ~ 30 )
5
20
Absolute Maximum Ratings
Parameter
Input Surge Voltage
Lead Temperature (1.5mm from case for 10 Sec.)
Internal Power Dissipation
Min.
-0.7
---
---
Max.
50
260
2,500
Unit
VDC
]
mW
Note :
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. Ripple & Noise measurement bandwidth is 0-20
MHz.
4. These power converters require a minimum
output loading to maintain specified regulation.
Min.
-25
-40
-40
---
Free-Air Convection
EN55022 Class A
Max.
+75
+90
+125
95
Unit
]
]
]
%
5. Operation under no-load conditions will not
damage these devices; however they may not
meet all listed specifications.
6. All DC/DC converters should be externally fused at
the front end for protection.
7. Other input and output voltage may be available,
please contact factory.
8. Specifications subject to change without notice.
Exceeding these values can damage the module. These are not continuous
operating ratings.
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
Conducted EMI
Conditions
Ambient
Case
Input Specifications
Parameter
Start Voltage
Under Voltage Shortdown
Reverse Polarity Input Current
Short Circuit Input Power
Input Filter
All Models
Model
Min.
4.5
---
---
---
Typ.
7
6.5
---
1000
Pi Filter
Max.
9
8.5
1
1500
Unit
VDC
A
mW
MIW1300 Series
Output Specifications
Parameter
Output Voltage Accuracy
Output Voltage Balance
Line Regulation
Load Regulation
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Over Power Protection
Transient Recovery Time
Transient Response Deviation
Temperature Coefficient
Output Short Circuit
25% Load Step Change
Over Line,Load & Temp
Dual Output Balance Load
Vin=Min. to Max.
Io=10% to 100%
Conditions
Min.
---
---
---
---
---
---
---
120
---
---
---
Continuous
Typ.
{0.5
{0.5
{0.2
{0.2
45
---
---
---
300
{3
{0.01
Max.
{2.0
{2.0
{0.5
{0.5
60
80
28
---
500
{5
{0.05
Unit
%
%
%
%
mV P-P
mV P-P
mV rms.
%
uS
%
%/]
General Specifications
Parameter
Isolation Voltage
Isolation Test Voltage
Isolation Resistance
Isolation Capacitance
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
Conditions
60 Seconds
Flash Tested for 1 Second
500VDC
100KHz,1V
Min.
1000
1100
1000
---
---
1000
Typ.
---
---
---
---
300
---
Max.
---
---
---
500
---
---
Unit
VDC
VDC
M[
pF
KHz
K Hours
Capacitive Load
Models by Vout
Maximum Capacitive Load
Note: # For each output .
5V
4000
12V
4000
15V
4000
{12V
#
470
{15V
#
470
Unit
uF
Input Fuse Selection Guide
All Models
600mA Slow - Blow Type
Input Voltage Transient Rating
50
45
Vin ( VDC )
40
35
30
25
20
15
10
10uS
100uS
1mS
10mS
100mS
MIW1300 Series
100
90
Efficiency (%)
80
70
60
50
Efficiency (%)
Low
Nom
Input Voltage (V)
High
100
90
80
70
60
50
Low
Nom
Input Voltage (V)
High
Efficiency vs Input Voltage ( Single Output )
Efficiency vs Input Voltage ( Dual Output )
100
90
Efficiency (%)
Efficiency (%)
10
20
40
60
80
80
70
60
50
40
30
100
100
90
80
70
60
50
40
30
10
20
40
60
80
100
Load Current (%)
Load Current (%)
Efficiency vs Output Load ( Single Output )
Efficiency vs Output Load ( Dual Output )
100
80
Output Power (%)
100LFM
Natural
convection
400LFM
200LFM
60
40
20
0
-40
〜
50
60
70
80
]
90
100
110
Ambient Temperature
Derating Curve
MIW1300 Series
Test Configurations
Input Reflected-Ripple Current Test Setup
To Oscilloscope
+
Battery
+
Lin
Current
Probe
+Vin
+Out
Load
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.
DC / DC
Converter
-Vin
-Out
Cin
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 devices.
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.
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Copper Strip
Cout
Scope
Resistive
Load
+
DC Power
Source
-
+
Cin
+Vin
DC / DC
Converter
-Vin
+Out
Load
-Out
Output Ripple Reduction
+Vin
Dual Output
DC / DC
Converter
-Vin
+Out
Com.
Cout
-Out
+
+Vin
Single Output
DC / DC
Converter
-Vin
-Out
+Out
Copper Strip
Cout
Scope
Resistive
Load
Scope
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.
Design & Feature Considerations
Maximum Capacitive Load
The MIW1300 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 470uF
maximum capacitive load for dual outputs and 4000
u
F
capacitive load for single outputs.
The maximum capacitance can be found in the data.
DC Power
Source
-
Cout
Load
+
DC Power
Source
-
+Vin
+Out
Dual Output
DC / DC Com.
Converter
Cout
Load
-Vin
-Out
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