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TOTAL POWER INT'LMKW5000 Series
25 - 30 Watts 2:1 Wide Input Range DC/DC Converters
Single Outputs
Key Features
Y Y Y Y Y Y Y Y Y Y Y Y Very High Efficiency up to 88% Lead-Free Design 2:1 Input Range I / O Isolation 1500VDC Output Trim Function Remote on/off Control (Optional) Soft Start Short Circuit Protection Over Voltage Protection Six-Sided Shielding Case EMI Complies With EN55022 Class A (Only For MKW5000A Series) MTBF > 600,000 Hours
MKW5000-Series power modules are low-profile dc-dc converters that operate over input voltage ranges of 18-36VDC and 36-75VDC and provide precisely regulated output voltages of 2.5V, 3.3V, 5V, 5.1V, 12V, 15V,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 30W of power into a 2 x 1.0 x 0.4 inch package, with efficiencies as high as 88%, the MKW5000 includes continuous short circuit protection, overvoltage protection, overtemperature protection, output trim function, remote on/off, six-side shielded case and EN55022 level A conducted noise compliance minimize design-in time, cost and eliminate the need for external components.
OVP
Protection Remote on/off
High Power Density
More Power
2:1
Wide Range
1500 VDC
I/O Isolation
EMI
EN55022
Block Diagram
Single Output
+Vin UVLO
COMPARATORS
LC Filter
LC Filter
+Vo
-Vo OVP
-Vin On/Off PWM Isolation Ref.Amp Trim
MKW5000 Series
Model Selection Guide
Model Number Input Voltage Output Voltage Output Current Input Current Reflected Over Efficiency Ripple Voltage Current Protection VDC 3 3.9 100 6.8 15 18 6.8 3 3.9 6.8 15 18 6.8 @Max. % Load . ) (Typ 84 86 88 88 88 88 84 86 88 88 88 88
VDC MKW5030 MKW5031 MKW5032 MKW5033 MKW5034 MKW5039 MKW5040 MKW5041 MKW5042 MKW5043 MKW5044 MKW5049 24 ( 18 ~ 36 )
VDC 2.5 3.3 5 12 15 5.1 2.5 3.3 5 12 15 5.1
Max. mA 6000 6000 5000 2500 2000 5000 6000 6000 5000 2500 2000 5000
Min. mA 0 0 0 166 133 0 0 0 0 166 133 0
@ M a x . @No Load Load mA ( T y p . ) mA ( T y p . ) mA ( T y p . ) 744 959 1185 1420 1420 1207 372 480 604 710 710 604 50 50 70 20 20 70 40 40 50 10 10 50
48 ( 36 ~ 75 )
50
Absolute Maximum Ratings
Parameter 24VDC Input Models 48VDC Input Models Lead Temperature (1.5mm from case for 10 Sec.) Power Dissipation Internal Input Surge Voltage ( 1000 mS ) Min. -0.7 -0.7 ----Max. 50 100 260 5500 Unit 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.
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. -40 Max. +50 Unit ] ] ] %
5. Operation at no-load will not damage these units. However, they may not meet all 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. 9.To order the converter with Remote on/off function ,please add suffix - RC ( EX : MK5000(A)-RC).
-40 +105 -50 +125 --95 Free-Air Convection
Six-Sided Shielded Metal Case EN55022 Class A
MKW5000 Series
Input Specifications
Parameter Start Voltage Under Voltage Shutdown Over Voltage Shutdown Reverse Polarity Input Current Short Circuit Input Power Input Filter All Models Model 24V Input Models 48V Input Models 24V Input Models 48V Input Models 24V Input Models 48V Input Models Min. 17 34 16 32 40 80 ----Typ. 17.5 35 16.5 33 42 82 ----Pi Filter Max. 18 36 17 34 44 84 2 4500 A mW VDC Unit
Output Specifications
Parameter Output Voltage Accuracy Line Regulation Load Regulation (2.5/3.3/5Vout) Load Regulation (12/15Vout) 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 Vin=Min. to Max. No Load to 100% Io=10% to 100% Conditions Min. --------------110 ------Continuous Typ. {0.5 {0.1 {0.5 {0.5 75 ------200 {2 {0.01 Max. {1.0 {0.3 {1.0 {1.0 100 120 10 160 500 {5 {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 --280 600 Typ. ------1200 350 --Max. ------1500 400 --Unit VDC VDC M[ pF KHz K Hours
Remote On/Off Control
Parameter Supply On Supply Off Device Standby Input Current Control Input Current ( on ) Control Input Current ( off ) Control Common Vin-RC=5.0V Vin-RC=0V Conditions Min. -1 ------Typ. --2 ----Max. 1 5 5 -100 Unit VDC VDC mA uA uA 2.5 to 100VDC or Open Circuit
Referenced to Negative Input
MKW5000 Series
Capacitive Load
Models by Vout Maximum Capacitive Load 2.5V 6800 3.3V 6800 5V 6800 5.1V 6800 12V 680 15V 680 Unit uF
Input Fuse Selection Guide
24V Input Models 3000mA Slow - Blow Type 48V Input Models 1500mA Slow - Blow Type
Output Voltage Trim
Parameter Trim Up / Down Range Conditions % of nominal output voltage Min. {9.0 Typ. {10.0 Max. {11.0 Unit %
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 24VDC Input Models 48VDC Input Models
MKW5000 Series
Efficiency vs Input Voltage ( Single Output )
Efficiency vs Output Load ( Single Output )
D e r a t i n g Curve
MKW5000 Series
Test Configurations
Input Reflected-Ripple Current Test Setup
To Oscilloscope + Battery + Lin Current Probe +Vin +Out Load
Output Voltage Trim
Output voltage trim allows the user to increase or decrease the output voltage set point of a module. The output voltage can be adjusted by placing an external resistor (Radj) between the Trim and +Vout or -Vout terminals. By adjusting Radj, the output voltage can be change by {10% of the nominal output voltage.
+Vin -Vin Enable +Out Trim Down 10K Trim Up/Down
DC / DC Converter -Vin -Out
Cin
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.
-Out Trim Up Trim
Peak-to-Peak Output Noise Measurement Test
Use a Cout 1.0uF 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 +Out Copper Strip Cout Resistive Scope Load
A 10K, 1 or 10 Turn trimpot is usually specified for continuous trimming. Trim pin may be safely left floating if it is not used. Connecting the external resistor (Radj-up) between the Trim and -Vout pins increases the output voltage to set the point as defined in the following equation:
Radj-up =
(33*Vout)- (30*Vadj) Vadj - Vout
Single Output DC / DC Converter -Vin -Out
Connecting the external resistor (Radj-down) between the Trim and +Vout pins decreases the output voltage set point as defined in the following equation:
Radj-down =
+Vin +Out Copper Strip Cout Cout Scope Resistive Load Scope
(36.667*Vadj) - (33*Vout) V out-Vadj
Vout : Nominal Output Voltage Vadj : Adjusted Output voltage Unit : VDC/ K[ s
Dual Output DC / DC Com. Converter -Vin -Out
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.
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 1.0V. A logic high is 2.5V to 100V. The maximum sink current at the on/off terminal (Pin 3) during a logic low is 100 mA. The maximum allowable leakage current of a switch connected to the on/off terminal (Pin 3) at logic hight (2.5V to 100V) is 5uA.
Output Overvoltage Protection
The output overvoltage clamp consists of control circuitry, which is independent of the primary regulation loop, that monitors the voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the primary loop. This provides a redundant voltage control that reduces the risk of output overvoltage. The OVP level can be found in the output data.
MKW5000 Series
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 33uF for the 12V input devices and a 10uF for the 24V and 48V devices.
+ DC Power Source + Cin -Vin -Out +Vin DC / DC Converter +Out Load
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 105C. 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
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 +Out
Single Output DC / DC Converter -Out
Cout
Load
+ DC Power Source -
+Vin
+Out Cout
Dual Output DC / DC Com. Converter -Vin -Out
Load
Maximum Capacitive Load
The MKW5000 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/A maximum of output current for dual outputs. The maximum capacitance can be found in the data .
MKW5000 Series
Mechanical Dimensions Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Single Output
3
2
1
6
5
4
Tolerance
Millimeters .X{0.25 .XX{0.25 {0.05
Inches .XX{0.01 .XXX{0.01 {0.002
Pin
Pin Connections
Pin 1 2 3 4 5 6 Single Output +Vin -Vin Remote on/off +Vout -Vout Trim
Physical Characteristics
50.8*25.4*10.2 mm 2.0*1.0*0.4 inches
Case Size
:
Case Material
:
Aluminum Anodizing Treatment in black
32g
Weight
:
The MKW5000 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.

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