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MKW2500 / MKW2500A Series
15 Watts 2 :1 Wide Input Range DC/DC Converters
Single and Dual Outputs
Key Features
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. 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.
2:1
Wide Range
High Power Density
More Power
1500 VDC
I/O Isolation
EMI
EN55022
Remote on/off
Block Diagram
Single Output Dual Output
+Vin
LC Filter
+Vo
+Vin
LC Filter
+Vo Com.
-Vo PWM Isolation Ref.Amp PWM Isolation Ref.Amp
-Vo
-Vin
-Vin
1
MINMAX
2004/REV:4
MKW2500 / MKW2500A Series
Model Selection Guide
Model Number Input Voltage Output Voltage Output Current Input Current Efficiency
VDC MKW2521 MKW2522 MKW2523 MKW2524 MKW2526 MKW2527 MKW2531 MKW2532 MKW2533 MKW2534 MKW2536 MKW2537 MKW2541 MKW2542 MKW2543 MKW2544 MKW2546 MKW2547
12 ( 9 ~ 18 )
24 ( 18 ~ 36 )
48 ( 36 ~ 75 )
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
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
@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
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 Min. -0.7 -0.7 -0.7 ----Max. 25 50 100 260 5,000 Unit VDC VDC 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. 5. Operation under no-load conditions will not damage these devices; however they may not meet all listed specifications.
Exceeding these values can damage the module.These are not continuous operating ratings.
Environmental Specifications
Parameter Operating Temperature Operating Temperature Storage Temperature Humidity Cooling RFI Conditions Ambient Case Min. Max. -40 +60 -40 +100 -50 +125 --95 Free-Air Convection Six-Side Shielded Metal Case Unit ] ] ] %
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 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.
2004/REV:4
MINMAX
2
MKW2500 / MKW2500A Series
Input Specifications
Parameter Start Voltage Model 12V Input Models 24V Input Models 48V Input Models 12V Input Models 24V Input Models 48V Input Models Reverse Polarity Input Current Short Circuit Input Power Input Filter All Models Min. 8 15 30 7 13 25 ----Typ. 8.5 17 33 8 15 29 ----Pi Filter Max. 9 18 36 8.5 17 34 1 3500 Unit
Under Voltage Shortdown
VDC
A mW
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 Conditions Dual Output Balance Load Vin=Min. to Max. Io=10% to 100% Over Line,Load & Temp Min. --------------120 ------Continuous Typ. {1.0 {0.5 {0.1 {0.5 55 ------300 {2 {0.01 Max. {2.0 {2.0 {0.5 {1.0 80 100 15 --500 {4 {0.02 Unit % % % % mV P-P mV P-P mV rms. % uS % %/]
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 100KHz,1V MIL-HDBK-217F @ 25], Ground Benign Min. 1500 1650 1000 --290 700 Typ. ------1200 330 --Max. ------1500 400 --Unit VDC VDC M[ pF KHz K Hours
Remote On/Off Control
Parameter Supply On Supply Off Standby Input Current Control Input Current ( on ) Control Input Current ( off ) Control Common Conditions Min. Typ. 2.5 to 5.5VDC or Open Circuit -0.7 --------------Referenced to Negative Input Max. 0.8 10 50 -1 Unit VDC mA uA mA
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MINMAX
2004/REV:4
MKW2500 / MKW2500A Series
Capacitive Load
Models by Vout Maximum Capacitive Load Note: # For each output . 3.3V 470 5.1V 470 12V 470 15V 470 {12V # 220 {15V # 220 Unit uF
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
150 140 130 120 110 100 Vin ( VDC ) 90 80 70 60 50 40 30 20 10 0 10uS 100uS 1mS 10mS 100mS 12VDC Input Models 24VDC Input Models 48VDC Input Models
2004/REV:4
MINMAX
4
MKW2500 / MKW2500A Series
100
100 90 Efficiency (%)
Low Nom Input Voltage (V) High
90 Efficiency (%)
80
80
70
70 60 50 Low Nom Input Voltage (V) High
60
50
Efficiency vs Input Voltage ( Single Output )
Efficiency vs Input Voltage ( Dual Output )
90 80 70 60 50 40 30
100 90 80 Efficiency (%) 70 60 50 40
Efficiency (%)
10
20
40
60 Load Current (%)
80
100
30
10
20
40
60 Load Current (%)
80
100
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
5
MINMAX
2004/REV:4
MKW2500 / MKW2500A 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 22uF for the 12V input devices and a 6.8uF for the 24V and 48V 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
+Vin Dual Output DC / DC Converter -Vin
+Out Com.
Copper Strip Cout Cout Scope Resistive Load Scope
-Out
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.
+ DC Power Source -Vin +Vin Single Output DC / DC Converter -Out +Out
Cout
Load
+ DC Power Source -
+Vin
+Out Dual Output DC / DC Com. Converter Cout Load
-Vin
-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
50mm / 2in
Air Flow
DUT
7
MINMAX
2004/REV:4
MKW2500 Series
Mechanical Data
10.20 [0.402] 10.20 [0.402] 2.5 [0.1]
Connecting Pin Patterns
Single Output
Top View ( 2.54 mm / 0.1 inch grids )
20.30 [0.800]
0.039]
3
4
5
1
2
6
1.00[
Bottom
Side
50.8 [2.00]
Dual Output
15.2 [0.60]
5.08 [0.200]
10.2 [0.40] 6.0 [0.24] 10.2 [0.40]
25.4 [1.00]
Tolerance
Pin
Millimeters .X{0.25 .XX{0.25 {0.05
Inches .XX{0.01 .XXX{0.01 {0.002
Pin Connections
Pin 1 2 3 4 5 6 Single Output +Vin -Vin +Vout Dual Output +Vin -Vin +Vout
Physical Characteristics
50.8*25.4*10.2 mm 2.0*1.0*0.4 inches
Case Size
:
Case Material Weight Flammability
No Pin Common -Vout -Vout Remote on/off (Optional)
: Nickl-Coated Copper With Non-Conductive Baseplate : 32g : 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

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