TOTAL POWER INT'LMKW5000 Series
25 - 30 Watts 2:1 Wide Input Range DC/DC Converters
Single Outputs
Key Features
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Very High Efficiency up to 88%
Lead-Free Design
2:1 Input Range
I / O Isolation 1500VDC
Output Trim Function
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
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)
Ÿ
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.
OVP
Protection
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.
Remote on/off
1500
VDC
2:1
Wide Range
Block Diagram
Single Output
+Vin
LC
Filter
LC
Filter
+Vo
UVLO
COMPARATORS
-Vo
OVP
-Vin
On/Off
High
Power
Density
PWM
Isolation
Ref.Amp
Trim
I/O Isolation
More Power
EMI
EN55022
MKW5000 Series
Model Selection Guide
Model
Number
Input
Voltage
Output
Voltage
VDC
VDC
Max.
mA
Min.
mA
2.5
3.3
6000
6000
0
0
744
959
5
12
15
5000
2500
2000
0
166
133
1185
1420
1420
5.1
2.5
3.3
5
12
5000
6000
6000
5000
2500
0
0
0
0
166
1207
372
480
604
710
MKW5044
15
2000
133
710
40
40
50
10
10
MKW5049
5.1
5000
0
604
50
MKW5030
MKW5031
MKW5032
MKW5033
MKW5034
MKW5039
MKW5040
MKW5041
MKW5042
MKW5043
24
( 18 ~ 36 )
48
( 36 ~ 75 )
Output Current
Input Current
Reflected
Over
Efficiency
Ripple
Voltage
Current Protection
@ M a x . @No Load
mALoad
( T y p . ) mA ( T y p . ) mA ( T y p . )
Absolute Maximum Ratings
50
50
70
20
20
70
100
50
VDC
@Max.
% Load
(Typ.)
3
3.9
84
86
6.8
15
18
88
88
88
6.8
3
3.9
6.8
15
88
84
86
88
88
18
88
6.8
88
Note :
Parameter
24VDC Input Models
48VDC Input Models
Lead Temperature (1.5mm from case for 10
Sec.)
Internal Power Dissipation
Input Surge Voltage
( 1000 mS )
Min.
-0.7
-0.7
---
Max.
50
100
260
Unit
VDC
VDC
]
---
5500
mW
Exceeding the absolute maximum ratings of the unit could cause damage.
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 at no-load will not damage these
units. However, they may not meet all
specifications.
Environmental Specifications
Parameter
Operating Temperature
Conditions
Ambient
Operating Temperature
Storage Temperature
Humidity
Cooling
Case
RFI
Conducted EMI
Min.
-40
Max.
+50
-40
+105
-50
+125
--95
Free-Air Convection
Six-Sided Shielded Metal Case
EN55022 Class A
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. Specifications subject to change without notice.
9.To order the converter with Remote on/off
function ,please add suffix - RC ( EX :
MK5000(A)-RC).
MKW5000 Series
Input Specifications
Parameter
Start Voltage
Under Voltage Shutdown
Over Voltage Shutdown
Model
Min.
Typ.
Max.
24V Input Models
17
17.5
18
48V Input Models
34
35
36
24V Input Models
16
16.5
17
48V Input Models
32
33
34
24V Input Models
40
42
44
48V Input Models
80
82
84
---
---
2
A
---
---
4500
mW
Reverse Polarity Input Current
Short Circuit Input Power
All Models
Input Filter
Unit
VDC
Pi Filter
Output Specifications
Parameter
Conditions
Output Voltage Accuracy
Min.
Typ.
Max.
Unit
---
{0.5
{1.0
%
Line Regulation
Vin=Min. to Max.
---
{0.1
{0.3
%
Load Regulation (2.5/3.3/5Vout)
No Load to 100%
---
{0.5
{1.0
%
Load Regulation
Io=10% to 100%
---
{0.5
{1.0
%
---
75
100
mV P-P
(12/15Vout)
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
---
---
120
mV P-P
Ripple & Noise (20MHz)
---
---
10
mV rms.
Over Power Protection
110
---
160
%
Transient Recovery Time
---
200
500
uS
Transient Response Deviation
Over Line,Load & Temp
25% Load Step Change
Temperature Coefficient
Output Short Circuit
---
{2
{5
%
---
{0.01
{0.02
%/]
Continuous
General Specifications
Conditions
Min.
Typ.
Max.
Unit
Isolation Voltage Rated
Parameter
60 Seconds
1500
---
---
VDC
Isolation Voltage Test
Flash Tested for 1 Second
1650
---
---
VDC
Isolation Resistance
500VDC
1000
---
---
M[
Isolation Capacitance
100KHz,1V
---
1200
1500
pF
280
350
400
KHz
600
---
---
K Hours
Min.
Typ.
Max.
Unit
-1
---
1
VDC
---
2
5
mA
---
---
5
uA
---
---
-100
uA
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
Remote On/Off Control
Parameter
Supply On
Conditions
2.5 to 100VDC or Open Circuit
Supply Off
Device Standby Input Current
Control Input Current ( on )
Vin-RC=5.0V
Control Input Current ( off )
Vin-RC=0V
Control Common
VDC
Referenced to Negative Input
MKW5000 Series
Capacitive Load
Models by Vout
2.5V
3.3V
5V
5.1V
12V
15V
Unit
Maximum Capacitive Load
6800
6800
6800
6800
680
680
uF
Input Fuse Selection Guide
24V Input Models
48V Input Models
3000mA Slow - Blow Type
1500mA Slow - Blow Type
Output Voltage Trim
Parameter
Trim Up / Down Range
Conditions
Min.
Typ.
Max.
Unit
% of nominal output voltage
{9.0
{10.0
{11.0
%
Input Voltage Transient Rating
150
140
130
120
48VDC Input Models
110
Vin ( VDC )
100
90
80
70
24VDC Input Models
60
50
40
30
20
10
0
10uS
100uS
1mS
10mS
100mS
MKW5000 Series
Efficiency vs Input Voltage ( Single Output )
D e r a t i n g Curve
Efficiency vs Output Load ( Single Output )
MKW5000 Series
Test Configurations
Output Voltage Trim
Input Reflected-Ripple Current Test Setup
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.
To Oscilloscope
+
Battery
+
Lin
+Vin
+Out
DC / DC
Converter
Current
Probe
Load
Cin
-Vin
-Out
+Out
+Vin
Trim Down
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 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
Single Output
DC / DC
Converter
-Vin
Copper Strip
Cout
Resistive
Scope
Load
-Vin
-Out
Trim Up
Enable
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 =
Dual Output
DC / DC
Com.
Converter
-Vin
Copper Strip
Cout
(36.667*Vadj) - (33*Vout)
V out-Vadj
Vout : Nominal Output Voltage
Scope
Resistive
Load
Cout
(33*Vout)- (30*Vadj)
Vadj - Vout
Connecting the external resistor (Radj-down) between
the Trim and +Vout pins decreases the output voltage set
point as defined in the following equation:
-Out
+Out
Trim
Up/Down
Trim
Radj-down =
+Vin
10K
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.
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.
Vadj : Adjusted Output voltage
Unit : VDC/ K[
s
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.
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
Thermal Considerations
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.
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 105°C.
The derating curves are determined from measurements
obtained in an experimental apparatus .
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.
Position of air velocity
probe and thermocouple
15mm / 0.6in
+
DC Power
Source
+Vin
+
+Out
DC / DC
Converter
Load
Cin
-
-Vin
-Out
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
Single Output
DC / DC
Converter
DC Power
Source
-
-Vin
+
+Vin
Cout
Load
-Out
+Out
Dual Output
DC / DC Com.
Converter
DC Power
Source
-
+Out
-Vin
-Out
Cout
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 .
50mm / 2in
Air Flow
DUT
MKW5000 Series
Mechanical Dimensions
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Single Output
3
2
6
5
Tolerance
Pin
1
4
Millimeters
Inches
.X{0.25
.XX{0.01
.XX{0.25
{0.05
.XXX{0.01
Pin Connections
{0.002
Physical Characteristics
Pin
Single Output
1
+Vin
2
-Vin
3
Remote on/off
4
+Vout
5
-Vout
6
Trim
50.8*25.4*10.2 mm
Case Size
:
Case Material
:
Aluminum Anodizing Treatment in
black
Weight
:
32g
2.0*1.0*0.4 inches
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.