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MKW1000 Series
10W, Wide Input Range, Single & Dual Output DC/DC Converters
Key Features
Efficiency up to 83% 1500VDC Isolation MTBF > 700,000 Hours 2:1 Wiide Input Range UL1950 Safety Approval Complies with EN55022 Class A Six-Sided Shielding Temperature Performance -40] to +71] Industry Standard Pinout Internal SMD Construction
Minmax's MKW1000 series of DC/DC converters, comprising 24 different models, is designed for a wide range of applications including 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 10W of power into a 2x1x0.4 inch package, with efficiencies as high as 83%, the MKW1000 has wide input ranges of 9-18VDC, 18-36VDC and 36-75VDC and is available in output voltages of 3.3V, 5V, 12V, 15V, 24V, {5V, {12V and {15VDC. Other feathers include continuous short circuit protection, six-sided shielded case and EN55022 Class A conducted noise compliance minimize design-in time, cost and eliminate the need for external filtering.
I/O Isolation
EN55022 Wide Range
$
Low Cost
1500 VDC
EMI
2:1
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
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MINMAX
REV:0 2005/04
MKW1000 Series
Model Selection Guide
Model Number Input Voltage Output Voltage Output Current Input Current Reflected Ripple Current mA (Typ.) Efficiency
VDC MKW1021 MKW1022 MKW1023 MKW1024 MKW1025 MKW1026 MKW1027 MKW1028 MKW1031 MKW1032 MKW1033 MKW1034 MKW1035 MKW1036 MKW1037 MKW1038 MKW1041 MKW1042 MKW1043 MKW1044 MKW1045 MKW1046 MKW1047 MKW1048
12 ( 9 ~ 18 )
24 ( 18 ~ 36 )
48 ( 36 ~ 75 )
VDC 3.3 5 12 15 24 {5 {12 {15 3.3 5 12 15 24 {5 {12 {15 3.3 5 12 15 24 {5 {12 {15
Max. mA 2400 2000 830 670 416 {1000 {416 {333 2400 2000 830 670 416 {1000 {416 {333 2400 2000 830 670 416 {1000 {416 {333
Min. mA 120 100 42 34 21 {50 {21 {17 120 100 42 34 21 {50 {21 {17 120 100 42 34 21 {50 {21 {17
@Max. Load mA (Typ.) 917 1082 1038 1047 1027 1068 1027 1041 434 534 506 511 501 521 507 507 217 260 253 252 251 257 251 251
@No Load mA (Typ.)
30
50
20
25
10
12
@Max. Load % (Typ.) 72 77 80 80 81 78 81 80 76 78 82 82 83 80 82 82 76 80 82 83 83 81 83 83
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
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.
Exceeding the absolute maximum ratings of the unit could cause damage. These are not continuous operating ratings.
Environmental Specifications
Parameter Operating Temperature Operating Temperature Storage Temperature Humidity Cooling RFI Conducted EMI Conditions Ambient Case Min. Max. -40 +71 -40 +90 -40 +125 --95 Free-Air Convection Six-Sided Shielded, Metal Case EN55022 Class A Unit ] ] ] %
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. Specifications subject to change without notice.
REV:0 2005/04
MINMAX
2
MKW1000 Series
Input Specifications
Parameter Start Voltage Model 12V Input Models 24V Input Models 48V Input Models Under Voltage Shutdown 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 --3500 Pi Filter Max. 9 18 36 8.5 17 34 2 4500 A mW VDC Unit
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, Balanced Loads Vin=Min. to Max. Io=10% to 100% Conditions Min. --------------120 ------Continuous Typ. {0.5 {0.5 {0.1 {0.1 50 ------150 {2 {0.01 Max. {1.0 {2.0 {0.3 {0.5 75 100 15 --300 {4 {0.02 Unit % % % % mV P-P mV P-P mV rms % uS % %/]
General Specifications
Parameter Isolation Voltage Rated Isolation Voltage Test 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. 1500 1650 1000 --260 700 Typ. ------150 300 --Max. ------470 340 --Unit VDC VDC M[ pF KHz K Hours
Capacitive Load
Models by Vout Maximum Capacitive Load # For each output 3.3V 2200 5V 2200 12V 2200 15V 2200 24V 2200 {5V # 470 {12V # 470 {15V # 470 Unit uF
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MINMAX
REV:0 2005/04
MKW1000 Series
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
REV:0 2005/04
MINMAX
4
MKW1000 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 )
90 80 Efficiency (%) Efficiency (%) 10 20 40 60 80 70 60 50 40 30 20 100
90 80 70 60 50 40 30 20 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
5
MINMAX
REV:0 2005/04
MKW1000 Series
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.
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.
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 15uF for the 12V input devices and a 4.7uF for the 24V and 48V devices.
+ DC Power Source + Cin -Vin -Out +Vin DC / DC Converter +Out Load
DC / DC Converter -Vin -Out
Cin
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 Resistive Scope Load
Output Ripple Reduction
Copper Strip Cout Scope Resistive Load Scope
+ DC Power Source +Vin Single Output DC / DC Converter -Vin -Out +Out
+Vin Dual Output DC / DC Converter -Vin
+Out Com.
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 3.9uF capacitors at the output.
Cout -Out
Design & Feature Considerations
Maximum Capacitive Load
The MKW1000 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 2200uF capacitive load for single outputs. The maximum capacitance can be found in the data sheet.
Cout
Load
-
+ DC Power Source -
+Vin
+Out Dual Output DC / DC Com. Converter Cout Load
-Vin
-Out
REV:0 2005/04
MINMAX
6
MKW1000 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 90C. 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
REV:0 2005/04
MKW1000 Series
Mechanical Dimensions
Top View ( 2.54 mm / 0.1 inch grids )
Connecting Pin Patterns
Single Output
10.20 [0.402] 10.20 [0.402]
2.5 [0.10]
20.30 [0.800]
0.039]
3
4
5
1.00[
Bottom
Side
50.8 [2.00]
1
2
Dual Output
5.08 [0.200]
10.2 [0.40] 25.4 [1.00] 6.0 [0.24] 10.2 [0.40]
Tolerance
Millimeters X.X{0.25 X.XX{0.13 {0.05
15.2 [0.60]
Inches X.XX{0.01 X.XXX{0.005 {0.002
Pin
Pin Connections
Pin 1 2 3 4 5 Single Output +Vin -Vin +Vout No Pin -Vout Dual Output +Vin -Vin +Vout Common -Vout
Physical Characteristics
50.8*25.4*10.2 mm 2.0*1.0*0.4 inches
Case Size
:
Case Material Weight Flammability
: Metal With Non-Conductive Baseplate : 32g : UL94V-0
The MKW1000 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

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