Dual Output
+Vo
PWM Isolation Ref.Amp
LC
Filter
+Vin
-Vin
Com.
-Vo
Single Output
PWM Isolation Ref.Amp
LC
Filter
+Vin
-Vin
-Vo
+Vo
Block Diagram
Remote on/off
EN55022
EMI
I/O Isolation
1500
VDC
More Power
High
Power
Density
Wide Range
2:1
Minmax's MKW2500 series, comprising 21 different models, has
been conceived as an application specific range of DC/DC converters,
specially addressing 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.
Packing up to 15W of power into a 2x1x0.4 inch package, with
efficiency as high as 86%, the MKW2500 has wide input ranges of
9-18VDC, 18-36VDC and 36-75VDC which is available in output
voltages of 3.3V, 5V, 5.1V, 12V, 15V, {12V and {15VDC.
Other feathers include continuous short circuit protection, remote
on/off, six-sided shielded case and EN55022 Class A conducted noise
compliance minimize design-in time, cost and eliminate the need for
external filtering.
yInternal SMD Construction
yUL 94V-0 Package Material
yRemote On/Off Control
ySix-Sided Shielding
yComplies with EN55022 Class A
yCSA1950 Safety Approval
y2:1 Wide Input Range
yMTBF > 700,000 Hours
y1500VDC Isolation
yEfficiency up to 86%
Key Features
15W, Wide Input Range, Single & Dual Output DC/DC Converters
MKW2500 Series
REV:0 2005/04
MINMAX
1
8139330030005.1MKW2549
86363{50{500{15MKW2547
86363{62.5{625{12MKW2546
86363100100015MKW2544
86363125125012MKW2543
8238130030005MKW2542
78
3010
26430030003.3
48
( 36 ~ 75 )
MKW2541
8178730030005.1MKW2539
86726{50{500{15MKW2537
86726{62.5{625{12MKW2536
86726100100015MKW2534
86726125125012MKW2533
8276230030005MKW2532
78
4020
52830030003.3
24
( 18 ~ 36 )
MKW2531
81157430030005.1MKW2529
861452{50{500{15MKW2527
861452{62.5{625{12MKW2526
861452100100015MKW2524
861452125125012MKW2523
82152430030005MKW2522
78
5030
105730030003.3
12
( 9 ~ 18 )
MKW2521
% (Typ.)mA (Typ.)
mA (Typ.)mA (Typ.)
mAmAVDCVDC
@Max. Load@No Load@Max. LoadMin.Max.
Efficiency
Reflected
Ripple
Current
Input CurrentOutput CurrentOutput
Voltage
Input
Voltage
Model
Number
Model Selection Guide
EN55022 Class AConducted EMI
Six-Sided Shielded, Metal CaseRFI
Free-Air ConvectionCooling
%95---Humidity
]+125-50Storage Temperature
]+100-40CaseOperating Temperature
]+60-40AmbientOperating Temperature
UnitMax.Min.ConditionsParameter
Environmental Specifications
Exceeding the absolute maximum ratings of the unit could cause damage.
These are not continuous operating ratings.
mW5,000---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. Ripple & Noise measurement bandwidth is 0-20
MHz.
4. These power converters require a minimum output
loading to maintain specified regulation.
5. Operation under no-load conditions will not damage
these modules; however, they may not meet all
specifications listed.
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. To order the converter with Remote On/Off function,
please add a suffix -RC (e.g. MKW2521-RC).
9. To order the converter with EN55022 Class A
function, please add a suffix A (e.g. MKW2521A).
10. Specifications subject to change without notice.
Absolute Maximum Ratings
MKW2500 Series
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MINMAX
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Pi FilterInput Filter
mW3500------Short Circuit Input Power
A1------
All Models
Reverse Polarity Input Current
34292548V Input Models
17151324V Input Models
8.58712V Input Models
Under Voltage Shutdown
36333048V Input Models
18171524V Input Models
VDC
98.5812V Input Models
Start Voltage
UnitMax.Typ.Min.ModelParameter
Input Specifications
ContinuousOutput Short Circuit
%/]{0.02{0.01---Temperature Coefficient
%{4{2---Transient Response Deviation
uS500300---
25% Load Step Change
Transient Recovery Time
%------120Over Power Protection
mV rms15------Ripple & Noise (20MHz)
mV P-P100------Over Line, Load & TempRipple & Noise (20MHz)
mV P-P8055---Ripple & Noise (20MHz)
%{1.0{0.5---Io=10% to 100%Load Regulation
%{0.5{0.1---Vin=Min. to Max.Line Regulation
%{2.0{0.5---Dual Output, Balanced LoadsOutput Voltage Balance
%{2.0{1.0---Output Voltage Accuracy
UnitMax.Typ.Min.ConditionsParameter
Output Specifications
K Hours------700MIL-HDBK-217F @ 25], Ground BenignMTBF
KHz400330290Switching Frequency
pF15001200---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
Referenced to Negative InputControl Common
mA-1------Vin-RC=0VControl Input Current ( off )
uA50------Vin-RC=5.0VControl Input Current ( on )
mA10------Standby Input Current
VDC0.8----0.7Supply Off
2.5 to 5.5VDC or Open CircuitSupply On
UnitMax.Typ.Min.ConditionsParameter
Remote On/Off Control
MKW2500 Series
REV:0 2005/04
MINMAX
3
# For each output
uF220220470470470470470Maximum Capacitive Load
Unit
{15V #{12V #
15V12V5.1V5V3.3VModels by Vout
Capacitive Load
750mA Slow - Blow Type1250mA Slow - Blow Type2500mA 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
MKW2500 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 )
30
40
50
60
70
80
90
100
Load Current (%)
Efficiency (%)
100
6040
2010 80
30
40
50
60
70
80
90
Load Current (%)
Efficiency (%)
100
6040
2010 80
Efficiency vs Input Voltage ( Dual Output )Efficiency vs Input Voltage ( Single Output )
50
60
70
80
90
100
Input Voltage (V)
Efficiency (%)
NomLow High
50
60
70
80
90
100
Input Voltage (V)
Efficiency (%)
NomLow High
MKW2500 Series
REV:0 2005/04
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
Remote On/Off
Positive logic remote on/off turns the module on during a
logic high voltage on the remote on/off pin, and off during a
logic low.
To turn the power module on and off, the user must supply
a switch to control the voltage between the on/off terminal and
the -Vin terminal.
The switch can be an open collector or equivalent.
A logic low is -0.7V to 0.8V.
A logic high is 2.5V to 5.5V.
The maximum sink current at on/off terminal during a logic
low is -1 mA.
The maximum allowable leakage current of the switch at
on/off terminal (2.5 to 5.5V) is 50uA.
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 22uF for the 12V input devices and a
6.8uF for the 24V and 48V devices.
MKW2500 Series
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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
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 4.7uF
capacitors at the output.
Maximum Capacitive Load
The MKW2500 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 220uF
maximum capacitive load for dual outputs and 470uF
capacitive load for single outputs.
The maximum capacitance can be found in the data sheet.
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 100°C.
The derating curves are determined from measurements
obtained in an experimental apparatus.
MKW2500 Series
REV:0 2005/04
MINMAX
7
+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
DUT
Position of air velocity
probe and thermocouple 50mm / 2in Air Flow
15mm / 0.6in
The MKW2500 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.
UL94V-0
:Flammability
Remote On/Off (Optional)6
32g
:Weight
-Vout-Vout5
CommonNo Pin4
Metal With Non-Conductive Baseplate:Case Material +Vout+Vout3
-Vin-Vin2
2.0*1.0*0.4 inches+Vin+Vin1
50.8*25.4*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
Dual Output
Single Output
25.4 [1.00] 10.2 [0.40]6.0 [0.24]
50.8 [2.00]
15.2 [0.60]
10.2 [0.40]
Bottom Side
12
345
6
10.20 [0.402] 10.20 [0.402] 2.5 [0.1]
5.08 [0.200]
20.30 [0.800]
1.00[ 0.039]
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Mechanical Dimensions
MKW2500 Series
8
MINMAX
REV:0 2005/04
