MKW3000 Series
20W, Wide Input Range, Single & Dual Output DC/DC Converters
Key Features
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Efficiency up to 89%
1500VDC Isolation
MTBF > 800,000 Hours
2:1 Wide Input Range
CSA1950 Safety Approval
Complies with EN55022 Class A
Six-Sided Shielding
Remote On/Off Control
Soft Start
Over Voltage Protection
Minmax's MKW3000 series, comprising 18 different models, has
been conceived as an application specific range of DC/DC converters,
specially addressing data communication equipments, mobile battery
High
Power
Density
OVP
driven equipments, distributed power systems, telecommunication
equipments, mixed analog/digital subsystems, process/machine control
Protection
equipments, computer peripheral systems and industrial robot systems.
Remote on/off
More Power
EMI
2:1
EN55022
Wide Range
Packing up to 20W of power into a 2x1x0.4 inch package, with
efficiency as high as 89%, the MKW3000 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, {12V and {15VDC.
Other feathers include continuous short circuit protection, overvoltage
protection, remote on/off, six-sided shielded case, and EN55022 Class A
conducted noise compliance minimize design-in time, cost and eliminate
I/O Isolation
the need for external filtering.
Block Diagram
Single Output
+Vin
Dual Output
+Vo
LC
Filter
+Vin
+Vo
LC
Filter
Com.
-Vo
-Vo
OVP
-Vin
On/Off
1
OVP
-Vin
PWM
Isolation
Ref.Amp
On/Off
MINMAX
PWM
Isolation
Ref.Amp
REV:0 2005/04
MKW3000 Series
Model Selection Guide
Model
Number
MKW3021
MKW3022
MKW3023
MKW3024
MKW3026
MKW3027
MKW3031
MKW3032
MKW3033
MKW3034
MKW3036
MKW3037
MKW3041
MKW3042
MKW3043
MKW3044
MKW3046
MKW3047
Input
Voltage
Output
Voltage
VDC
VDC
3.3
5
12
15
{12
{15
3.3
5
12
15
{12
{15
3.3
5
12
15
{12
{15
12
( 9 ~ 18 )
24
( 18 ~ 36 )
48
( 36 ~ 75 )
Output Current
Max.
mA
4000
4000
1670
1340
{835
{670
4000
4000
1670
1340
{835
{670
4000
4000
1670
1340
{835
{670
Min.
mA
240
240
100
80
{50
{40
240
240
100
80
{50
{40
240
240
100
80
{50
{40
Input Current
@Max. Load @No Load
mA (Typ.)
mA (Typ.)
1358
1984
1898
30
1903
1898
1903
671
980
938
17
941
938
941
335
490
469
10
471
469
471
Over
Voltage
Protection
mA (Typ.)
VDC
3.9
6.8
15
18
{15
{18
3.9
6.8
15
18
{15
{18
3.9
6.8
15
18
{15
{18
50
30
20
Efficiency
@Max. Load
% (Typ.)
81
84
88
88
88
88
82
85
89
89
89
89
82
85
89
89
89
89
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
Reflected
Ripple
Current
Min.
-0.7
-0.7
-0.7
-----
Max.
25
50
100
260
4,500
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.
5. Operation under no-load conditions will not
damage these modules; however, they may not
meet all specifications listed.
Environmental Specifications
Parameter
Operating Temperature
Operating Temperature
Storage Temperature
Humidity
Cooling
RFI
Conducted EMI
REV:0 2005/04
Conditions
Ambient
Case
Min.
Max.
-40
+50
-40
+105
-50
+125
--95
Free-Air Convection
Six-Sided Shielded, Metal Case
EN55022 Class A
Unit
]
]
]
%
MINMAX
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 without Remote On/Off
function, please add a suffix -N
(e.g.MKW3021-N).
2
MKW3000 Series
Input Specifications
Parameter
Start Voltage
Under Voltage Shutdown
Model
Min.
Typ.
Max.
12V Input Models
8.6
8.8
9
18
24V Input Models
17
17.5
48V Input Models
34
35
36
12V Input Models
8.1
8.3
8.5
24V Input Models
16
16.5
17
48V Input Models
32
33
34
---
---
2
A
---
---
3500
mW
Reverse Polarity Input Current
Short Circuit Input Power
Unit
All Models
Input Filter
VDC
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
%
---
55
80
mV P-P
---
---
100
mV P-P
---
---
10
mV rms
Over Power Protection
110
---
160
%
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)
Transient Response Deviation
25% Load Step Change
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
---
1200
1500
pF
Switching Frequency
MTBF
290
330
360
KHz
MIL-HDBK-217F @ 25], Ground Benign
800
---
---
K Hours
Conditions
Min.
Typ.
Max.
Unit
Remote On/Off Control
Parameter
Supply On
2.5 to 100VDC or Open Circuit
Supply Off
Standby Input Current
Control Input Current ( on )
Vin-RC = 5.0V
Control Input Current ( off )
Vin-RC = 0V
Control Common
3
0
---
1
VDC
---
2
5
mA
---
---
5
uA
---
---
-100
uA
Referenced to Negative Input
MINMAX
REV:0 2005/04
MKW3000 Series
Capacitive Load
Models by Vout
3.3V
5V
12V
15V
{12V #
{15V #
Unit
Maximum Capacitive Load
6800
6800
680
680
270
270
uF
# For each output
Input Fuse Selection Guide
12V Input Models
24V Input Models
48V Input Models
4000mA Slow - Blow Type
2000mA Slow - Blow Type
1000mA 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 (%)
MKW3000 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
400LFM
Output Power (%)
80
Natural
convection
60
100LFM
200LFM
40
20
0
〜
-40
50
60
70
80
Ambient Temperature
90
100
110
]
Derating Curve
5
MINMAX
REV:0 2005/04
MKW3000 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 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.
+Out
DC / DC
Converter
Current
Probe
Overvoltage Protection
Load
-Out
Peak-to-Peak Output Noise Measurement Test
Input Source Impedance
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.
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.
+Vin
+Out
Single Output
DC / DC
Converter
Copper Strip
Cout
-Vin
-Out
+Vin
+Out
Com.
-Vin
-Out
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.
Resistive
Load
Copper Strip
Cout
Dual Output
DC / DC
Converter
Scope
Cout
+
Scope
Resistive
Load
DC Power
Source
Scope
-
+Vin
+
+Out
DC / DC
Converter
Load
Cin
-Vin
-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 -0V to 1.0V.
A logic high is 2.5V to 100V.
The maximum sink current at on/off terminal during a logic
low is -100 uA.
The maximum allowable leakage current of the switch at
on/off terminal (2.5 to 100V) is 5uA.
REV:0 2005/04
MINMAX
6
MKW3000 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.
+
+Vin
+Out
Single Output
DC / DC
Converter
DC Power
Source
Cout
-
-Vin
-Out
+
+Vin
+Out
Dual Output
DC / DC Com.
Converter
DC Power
Source
-
-Vin
Load
Cout
Load
-Out
Maximum Capacitive Load
The MKW3000 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 270uF
maximum capacitive load for dual outputs, 680uF capacitive
load for 12V & 15V outputs and 6800uF capacitive load for
3.3V & 5V outputs.
The maximum capacitance can be found in the data sheet.
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 105°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
MKW3000 Series
Mechanical Dimensions
5
6
Dual Output
15.2 [0.60]
2
Side
1.00[
Bottom
1
0.039]
4
20.30 [0.800]
3
Single Output
2.5 [0.1]
50.8 [2.00]
10.20 [0.402] 10.20 [0.402]
Connecting Pin Patterns
Top View ( 2.54 mm / 0.1 inch grids )
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
6
Remote On/Off
Remote On/Off
50.8*25.4*10.2 mm
Case Size
:
Case Material
: Metal With Non-Conductive Baseplate
Weight
: 30g
Flammability
: UL94V-0
2.0*1.0*0.4 inches
The MKW3000 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