MKW2500 / MKW2500A Series
15 Watts 2 :1 Wide Input Range DC/DC Converters
Single and Dual Outputs
Key Features
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High Efficiency up to 86%
2:1 Input Range
I / O Isolation 1500VDC
Short Circuit Protected
Industry Standard Pinout
Six-Side Shielded Case
EMI Complies With EN55002 Class A
(Only For MKW2500A Series)
Remote on/off Control (Optional)
MTBF > 700,000 Hours
Minmax's MKW2500 series, comprising 18 different models, has
been conceived as an applications 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 2 x 1 x 0.4 inch package, with
efficiency as high as 86%, the MKW2500 has wide input ranges of
9-18VDC, 18-36VDC and 36-75VDC, and is available in output
voltages of 3.3V, 5.1V, 12V, 15V, {12V and {15V.
1500
VDC
Other feathers include continuous short circuit protection, remote
on/off,six-side shieled case and EN55022 level A conducted noise
compliance minimize design-in time,cost and eliminate the need for
external components.
I/O Isolation
2:1
High
Power
Density
Wide Range
More Power
EMI
EN55022
Remote on/off
Block Diagram
Single Output
+Vin
Dual Output
+Vo
LC
Filter
+Vin
+Vo
LC
Filter
Com.
-Vo
-Vin
1
PWM
Isolation
Ref.Amp
-Vo
-Vin
MINMAX
PWM
Isolation
Ref.Amp
2004/REV:4
MKW2500 / MKW2500A Series
Model Selection Guide
Model Number
MKW2521
MKW2522
MKW2523
MKW2524
MKW2526
MKW2527
MKW2531
MKW2532
MKW2533
MKW2534
MKW2536
MKW2537
MKW2541
MKW2542
MKW2543
MKW2544
MKW2546
MKW2547
Input
Voltage
Output
Voltage
VDC
VDC
3.3
5.1
12
15
{12
{15
3.3
5.1
12
15
{12
{15
3.3
5.1
12
15
{12
{15
12
( 9 ~ 18 )
24
( 18 ~ 36 )
48
( 36 ~ 75 )
Output Current
Max.
mA
3000
2950
1250
1000
{625
{500
3000
2950
1250
1000
{625
{500
3000
2950
1250
1000
{625
{500
Min.
mA
300
295
125
100
{62.5
{50
300
295
125
100
{62.5
{50
300
295
125
100
{62.5
{50
Efficiency
@Max. Load @No Load
mA (Typ.)
mA (Typ.)
1056
1529
1452
30
1452
1452
1452
528
764
726
20
726
726
726
264
382
363
10
363
363
363
@Max. Load
% (Typ.)
78
82
86
86
86
86
78
82
86
86
86
86
78
82
86
86
86
86
Note :
Absolute Maximum Ratings
Parameter
12VDC Input Models
Input Surge Voltage
24VDC Input Models
( 1000 mS )
48VDC Input Models
Lead Temperature (1.5mm from case for 10 Sec.)
Internal Power Dissipation
Input Current
Min.
-0.7
-0.7
-0.7
-----
Max.
25
50
100
260
5,000
Unit
VDC
VDC
VDC
]
mW
Exceeding these values can damage the module.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. 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 devices; however they may not
meet all listed specifications.
6. All DC/DC converters should be externally fused
at the front end for protection.
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
RFI
2004/REV:4
Conditions
Ambient
Case
7. Other input and output voltage may be available,
please contact factory.
Min.
Max.
-40
+60
-40
+100
-50
+125
--95
Free-Air Convection
Six-Side Shielded Metal Case
Unit
]
]
]
%
MINMAX
8.To order the converter with Remote on/off function
,please add suffix - RC ( EX : MK2521-RC )
9. An optional internal filter is available. When the
filter is added, the MKW2500 will meet
EN55022-A. Add the suffix “ A” to the model
number, e.g. MKW2521A.
10. Specifications subject to change without notice.
2
MKW2500 / MKW2500A Series
Input Specifications
Parameter
Start Voltage
Under Voltage Shortdown
Model
12V Input Models
24V Input Models
48V Input Models
12V Input Models
Min.
8
15
30
7
Typ.
8.5
17
33
8
Max.
9
18
36
8.5
24V Input Models
48V Input Models
13
25
---
15
29
---
17
34
1
A
---
---
3500
mW
Reverse Polarity Input Current
Short Circuit Input Power
Input Filter
All Models
Unit
VDC
Pi Filter
Output Specifications
Parameter
Output Voltage Accuracy
Output Voltage Balance
Conditions
Dual Output Balance Load
Min.
-----
Typ.
{1.0
{0.5
Max.
{2.0
{2.0
Unit
%
%
Line Regulation
Load Regulation
Ripple & Noise (20MHz)
Vin=Min. to Max.
Io=10% to 100%
-------
{0.1
{0.5
55
{0.5
{1.0
80
%
%
mV P-P
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Over Power Protection
Over Line,Load & Temp
----120
-------
100
15
---
mV P-P
mV rms.
%
300
{2
{0.01
500
{4
{0.02
uS
%
%/]
Transient Recovery Time
Transient Response Deviation
Temperature Coefficient
Output Short Circuit
------Continuous
25% Load Step Change
General Specifications
Parameter
Isolation Voltage
Isolation Test Voltage
Isolation Resistance
Isolation Capacitance
Switching Frequency
MTBF
Conditions
60 Seconds
Flash Tested for 1 Second
500VDC
Min.
1500
1650
1000
Typ.
-------
Max.
-------
Unit
VDC
VDC
M[
100KHz,1V
--290
700
1200
330
---
1500
400
---
pF
KHz
K Hours
Min.
Typ.
2.5 to 5.5VDC or Open Circuit
-0.7
-------
Max.
Unit
0.8
10
VDC
mA
--------Referenced to Negative Input
50
-1
uA
mA
MIL-HDBK-217F @ 25], Ground Benign
Remote On/Off Control
Parameter
Supply On
Supply Off
Standby Input Current
Control Input Current ( on )
Control Input Current ( off )
Control Common
3
Conditions
MINMAX
2004/REV:4
MKW2500 / MKW2500A Series
Capacitive Load
Models by Vout
Maximum Capacitive Load
3.3V
470
5.1V
470
12V
470
15V
470
{12V #
220
{15V #
220
Unit
uF
Note: # For each output .
Input Fuse Selection Guide
12V Input Models
3000mA Slow - Blow Type
24V Input Models
1500mA Slow - Blow Type
48V Input Models
750mA 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
2004/REV:4
100uS
1mS
MINMAX
10mS
100mS
4
100
100
90
90
Efficiency (%)
Efficiency (%)
MKW2500 / MKW2500A Series
80
70
60
80
70
60
50
50
Low
Nom
High
Low
Nom
Input Voltage (V)
Input Voltage (V)
Efficiency vs Input Voltage ( Single Output )
Efficiency vs Input Voltage ( Dual Output )
90
100
80
90
80
Efficiency (%)
70
Efficiency (%)
High
60
50
70
60
50
40
30
40
10
40
20
60
80
30
100
Load Current (%)
20
40
60
80
100
Load Current (%)
Efficiency vs Output Load ( Single Output )
100
Efficiency vs Output Load ( Dual Output )
400LFM
100LFM
80
Output Power (%)
10
200LFM
Natural
convection
60
40
20
0
～
-40
50
60
70
90
80
Ambient Temperature
100
110
]
Derating Curve
5
MINMAX
2004/REV:4
MKW2500 / MKW2500A 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.
To Oscilloscope
+
+
Battery
+Vin
Lin
DC / DC
Converter
Current
Probe
Cin
+Out
-Vin
Load
Input Source Impedance
-Out
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.
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.
+
+Vin
+Out
Single Output
DC / DC
Converter
Copper Strip
Cout
-Vin
-Out
+Vin
+Out
Dual Output
DC / DC
Converter
Com.
-Vin
-Out
Scope
DC Power
Source
Resistive
Load
-
+Vin
+
+Out
DC / DC
Converter
Load
Cin
-Vin
-Out
Copper Strip
Cout
Scope
Cout
Scope
Resistive
Load
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.
Negative logic remote on/off turns the module off during a
logic low and on during a logic high.
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.
2004/REV:4
MINMAX
6
MKW2500 / MKW2500A Series
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.
+
+Vin
+Out
Single Output
DC / DC
Converter
DC Power
Source
Cout
-
-Vin
-Out
+
+Vin
+Out
Dual Output
DC / DC
Com.
Converter
DC Power
Source
-
-Vin
Load
Cout
Load
-Out
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.
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.
Position of air velocity
probe and thermocouple
15mm / 0.6in
7
50mm / 2in
Air Flow
DUT
MINMAX
2004/REV:4
MKW2500 Series
Mechanical Data
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
5
Side
6
Dual Output
15.2 [0.60]
2
1.00[
Bottom
1
0.039]
4
20.30 [0.800]
3
Single Output
2.5 [0.1]
50.8 [2.00]
10.20 [0.402] 10.20 [0.402]
10.2 [0.40]
5.08 [0.200]
25.4 [1.00]
Tolerance
Pin
6.0 [0.24]
Millimeters
.X{0.25
.XX{0.25
{0.05
10.2 [0.40]
Inches
.XX{0.01
.XXX{0.01
{0.002
Pin Connections
Pin
1
2
3
4
5
6
Physical Characteristics
Single Output
+Vin
-Vin
+Vout
Dual Output
+Vin
-Vin
+Vout
No Pin
Common
-Vout
-Vout
Remote on/off (Optional)
50.8*25.4*10.2 mm
2.0*1.0*0.4 inches
Case Size
:
Case Material
Weight
: Nickl-Coated Copper
With Non-Conductive Baseplate
: 32g
Flammability
: UL94V-0
Units are encapsulated in a low thermal resistance molding compound which has excellent chemical resistance and electrical
properties in high humidity environment and over a wide operating temperature range.
The encapsulant and outer shell of the unit have UL94V-0 ratings. The leads are golden plated for better soldering.
2004/REV:4
MINMAX
8