MKW1000 Series
10W, Wide Input Range, Single & Dual Output DC/DC Converters
Key Features
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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,
Low Cost
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
1500
VDC
of 3.3V, 5V, 12V, 15V, 24V, {5V, {12V and {15VDC.
Other feathers include continuous short circuit protection, six-sided
EMI
2:1
EN55022
Wide Range
shielded case and EN55022 Class A conducted noise compliance
minimize design-in time, cost and eliminate the need for external
I/O Isolation
filtering.
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
REV:0 2005/04
MKW1000 Series
Model Selection Guide
Model
Number
MKW1021
MKW1022
MKW1023
MKW1024
MKW1025
MKW1026
MKW1027
MKW1028
MKW1031
MKW1032
MKW1033
MKW1034
MKW1035
MKW1036
MKW1037
MKW1038
MKW1041
MKW1042
MKW1043
MKW1044
MKW1045
MKW1046
MKW1047
MKW1048
Input
Voltage
Output
Voltage
VDC
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
12
( 9 ~ 18 )
24
( 18 ~ 36 )
48
( 36 ~ 75 )
Output Current
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
Input Current
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
@No Load
mA (Typ.)
mA (Typ.)
30
50
20
25
10
12
Efficiency
@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
Notes :
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
@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
Reflected
Ripple
Current
Min.
-0.7
-0.7
-0.7
-----
Max.
25
50
100
260
5,000
Unit
VDC
VDC
VDC
]
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.
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
RFI
Conducted EMI
REV:0 2005/04
Conditions
Ambient
Case
Min.
Max.
-40
+71
-40
+90
-40
+125
--95
Free-Air Convection
Six-Sided Shielded, Metal Case
EN55022 Class A
Unit
]
]
]
%
MINMAX
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.
2
MKW1000 Series
Input Specifications
Parameter
Start Voltage
Model
Under Voltage Shutdown
Min.
Typ.
12V Input Models
8
8.5
9
24V Input Models
15
17
18
48V Input Models
30
33
36
12V Input Models
7
8
8.5
24V Input Models
13
15
17
34
48V Input Models
Reverse Polarity Input Current
Short Circuit Input Power
Max.
All Models
Unit
VDC
25
29
---
---
2
A
---
3500
4500
mW
Input Filter
Pi Filter
Output Specifications
Parameter
Conditions
Min.
Typ.
Max.
Unit
---
{0.5
{1.0
%
Dual Output, Balanced Loads
---
{0.5
{2.0
%
Line Regulation
Vin=Min. to Max.
---
{0.1
{0.3
%
Load Regulation
Io=10% to 100%
---
{0.1
{0.5
%
---
50
75
mV P-P
---
---
100
mV P-P
---
---
15
mV rms
Over Power Protection
120
---
---
%
Transient Recovery Time
---
150
300
uS
Output Voltage Accuracy
Output Voltage Balance
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Over Line, Load & Temp.
Ripple & Noise (20MHz)
25% Load Step Change
Transient Response Deviation
Temperature Coefficient
Output Short Circuit
---
{2
{4
%
---
{0.01
{0.02
%/]
Continuous
General Specifications
Parameter
Conditions
Min.
Typ.
Max.
Unit
Isolation Voltage Rated
60 Seconds
1500
---
---
VDC
Isolation Voltage Test
Flash Tested for 1 Second
1650
---
---
VDC
Isolation Resistance
500VDC
1000
---
---
M[
Isolation Capacitance
100KHz,1V
---
150
470
pF
Switching Frequency
MTBF
MIL-HDBK-217F @ 25], Ground Benign
260
300
340
KHz
700
---
---
K Hours
Capacitive Load
Models by Vout
Maximum Capacitive Load
3.3V
5V
12V
15V
24V
{5V #
{12V #
{15V #
Unit
2200
2200
2200
2200
2200
470
470
470
uF
# For each output
3
MINMAX
REV:0 2005/04
MKW1000 Series
Input Fuse Selection Guide
12V Input Models
3000mA Slow - Blow Type
24V Input Models
48V Input Models
1500mA Slow - Blow Type
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
REV:0 2005/04
100uS
1mS
MINMAX
10mS
100mS
4
100
100
90
90
Efficiency (%)
Efficiency (%)
MKW1000 Series
80
70
60
80
70
60
50
Low
Nom
50
High
Low
Nom
Input Voltage (V)
Efficiency vs Input Voltage ( Dual Output )
90
90
80
80
70
70
Efficiency (%)
Efficiency (%)
Efficiency vs Input Voltage ( Single Output )
60
50
60
50
40
40
30
30
20
10
20
40
High
Input Voltage (V)
60
80
100
20
Load Current (%)
10
20
40
60
80
100
Load Current (%)
Efficiency vs Output Load ( Single Output )
Efficiency vs Output Load ( Dual Output )
100
100LFM
400LFM
Natural
convection
200LFM
Output Power (%)
80
60
40
20
0
〜
-40
50
60
70
80
Ambient Temperature
90
100
110
]
Derating Curve
5
MINMAX
REV:0 2005/04
MKW1000 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.
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
+
+Vin
Lin
Cin
-Vin
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.
+Out
DC / DC
Converter
Current
Probe
Load
-Out
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
+Out
Input Source Impedance
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
Copper Strip
+Vin
+
DC / DC
Converter
Cout
-Vin
-Out
+Vin
+Out
Dual Output
DC / DC
Converter
Com.
-Vin
-Out
Load
Cin
-
Single Output
DC / DC
Converter
+Out
-Vin
-Out
Resistive
Scope
Load
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 3.9uF
capacitors at the output.
Copper Strip
Cout
Scope
Cout
Scope
Resistive
Load
+
+Vin
DC Power
Source
Design & Feature Considerations
+Out
Single Output
DC / DC
Converter
-
-Vin
+
+Vin
Cout
Load
-Out
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.
REV:0 2005/04
DC Power
Source
MINMAX
-
+Out
Dual Output
DC / DC Com.
Converter
-Vin
-Out
Cout
Load
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 90°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
REV:0 2005/04
MKW1000 Series
Mechanical Dimensions
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
Single Output
10.20 [0.402] 10.20 [0.402]
2
Dual Output
15.2 [0.60]
1
Side
1.00[
Bottom
50.8 [2.00]
5
0.039]
4
20.30 [0.800]
3
2.5 [0.10]
10.2 [0.40]
5.08 [0.200]
25.4 [1.00]
Tolerance
Pin
6.0 [0.24]
10.2 [0.40]
Millimeters
Inches
X.X{0.25
X.XX{0.01
X.XX{0.13
{0.05
X.XXX{0.005
{0.002
Pin Connections
Physical Characteristics
Pin
Single Output
Dual Output
1
+Vin
+Vin
2
-Vin
-Vin
3
+Vout
+Vout
4
No Pin
Common
5
-Vout
-Vout
50.8*25.4*10.2 mm
Case Size
:
Case Material
: Metal With Non-Conductive Baseplate
Weight
: 32g
Flammability
: UL94V-0
2.0*1.0*0.4 inches
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