The MINMAX MKW30 series is a range of isolated 20W DC/DC converter modules featuring fully regulated output voltages and wide 2:1 input voltage
ranges. The product comes in a 2”x 1”x 0.4” metal package with industry standard pinout. An excellent efficiency allows an operating temperature range
of –40°C to +80°C. They feature an input filter to meet EN 55022,class A and optional remote On/Off input.
Typical applications for these converters are battery operated equipment and instrumentation, distributed power systems, data communication and general
industrial electronics.
Model Selection Guide
Model
Number
Input
Voltage
(Range)
VDC
MKW3021
MKW3022
MKW3023
MKW3024
MKW3026
MKW3027
MKW3031
MKW3032
MKW3033
MKW3034
MKW3036
MKW3037
MKW3041
MKW3042
MKW3043
MKW3044
MKW3046
MKW3047
Output
Voltage
VDC
3.3
5
12
15
±12
±15
3.3
5
12
15
±12
±15
3.3
5
12
15
±12
±15
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
mA(typ.)
1358
1984
1898
1903
1898
1903
671
980
938
941
938
941
335
490
469
471
469
471
@No Load
mA(typ.)
Reflected
Ripple
Current
mA(typ.)
Max. capacitive
Load
µF
6800
30
50
680
270#
6800
17
30
680
270#
6800
10
20
680
270#
# For each output
Efficiency
(typ.)
@Max. Load
%
81
84
88
88
88
88
82
85
89
89
89
89
82
85
89
89
89
89
12
(9 ~ 18)
24
(18 ~ 36)
48
(36 ~ 75)
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/08/28 REV:5
Page 1 of 5
®
MKW3000 SERIES
DC/DC CONVERTER 20W
Input Specifications
Parameter
Input Surge Voltage (1 sec. max.)
Model
12V Input Models
24V Input Models
48V Input Models
12V Input Models
24V Input Models
48V Input Models
12V Input Models
24V Input Models
48V Input Models
Min.
Typ.
Max.
Unit
-0.7
25
---
-0.7
50
---
-0.7
100
---
8.6
8.8
9
VDC
17
17.5
18
34
35
36
8.1
8.3
8.5
16
16.5
17
32
33
34
---
---
2
A
---
---
3500
mW
---
---
4500
mW
Compliance to EN 55022,class A and FCC part 15,class A
Operating Ambient Temperature Range (See Power Derating Curve)
Case Temperature
Storage Temperature Range
Humidity (non condensing)
Cooling
Lead Temperature (1.5mm from case for 10Sec.)
Conditions
Natural Convection
Min.
-40
---
-50
---
Free-Air convection
---
260
℃
Max.
+80
+100
+125
95
Unit
℃
℃
℃
% rel. H
Power Derating Curve
Derating Curve without Heatsink
Derating Curve with Heatsink
Notes
1
2
3
4
5
6
7
8
9
10
Specifications typical at Ta=+25℃, resistive load, nominal input voltage and rated output current unless otherwise noted.
Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%
Ripple & Noise measurement bandwidth is 0-20MHz.
These power converters require a minimum output loading to maintain specified regulation, operation under no-load conditions will not damage these modules;
however they may not meet all specifications listed.
All DC/DC converters should be externally fused at the front end for protection.
Other input and output voltage may be available, please contact factory.
To order the converter without Remote On/Off function, please add
suffix N
(e.g.MKW3021-N) to order code.
To order the converter with heatsink, please add
suffix H
(e.g. MKW3021H) to order code.
That “natural convection” is about 20LFM but is not equal to still air (0 LFM).
Specifications subject to change without notice.
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/08/28 REV:5
Page 3 of 5
®
MKW3000 SERIES
DC/DC CONVERTER 20W
Package Specifications
Mechanical Dimensions
2.54
[0.10]
10.16
[0.40]
10.16
[0.40]
Pin Connections
Pin
Single Output
1
+Vin
2
3
4
5
20.32 [0.80]
1.00
[
0.04
]
Dual Output
+Vin
-Vin
+Vout
Common
-Vout
-Vin
+Vout
No Pin
-Vout
Remote On/Off
NC: No Connection
3
4
5
6
50.8 [2.00]
Bottom View
3.6 [0.14]
1
2
6
1.1 [0.04]
15.2 [0.60]
►
All dimensions in mm
7.62
5.08
[0.30] [0.20]
7.62
[0.30]
6.0
[0.24]
10.2
[0.40]
(inches)
►
Tolerance: X.X±0.25
(X.XX±0.01)
25.4 [1.00]
X.XX±0.13 ( X.XXX±0.005)
►
Pin
diameter
—
1.0 ±0.05 (0.04±0.002)
Physical Characteristics
Case Size
Case Material
Base Material
Pin Material
Weight
:
:
:
:
:
50.8x25.4x10.2mm (2.0x1.0x0.40 inches)
Metal With Non-Conductive Baseplate
FR4 PCB (flammability to UL 94V-0 rated)
Copper Alloy with Gold Plate Over Nickel Subplate
32g
Physical Characteristics
Heatsink Material
Finish
Weight
31.1[1.22]
Heatsink (Option –H)
:
:
:
Aluminum
Black Anodized Coating
9g
17.2[0.68]Max
31.0[1.22]Max
►
The advantages of adding a
Heat-sink
Thermal pad
Clamp
Converter
heatsink are:
1. To help heat dissipation and increase the stability
and reliability of DC/DC converters at high
operating temperature atmosphere.
2. To upgrade the operating temperature of DC/DC
converters, please refer to Derating Curve.
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2012/08/28 REV:5
Page 4 of 5
®
Test Setup
MKW3000 SERIES
DC/DC CONVERTER 20W
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor Lin (4.7µH) 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
+Vin
Current
Probe
+Out
Load
DC / DC
Converter
-Vin
-Out
Cin
Peak-to-Peak Output Noise Measurement Test
Use a Cout 1.0µF 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
Copper Strip
Resistive
Scope
Load
+Vin
Dual Output
DC / DC
Converter
-Vin
+Out
Com.
-Out
Copper Strip
Cout
Copper Strip
Cout
Copper Strip
Scope
Scope
Resistive
Load
Technical Notes
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 µA. The maximum allowable leakage
current of the switch at on/off terminal (2.5 to 100V) is 5µA.
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.
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.
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 22µF for the 12V input devices and a 6.8µF for the 24V and 48V devices.
+
DC Power
Source
-
+
Cin
-Vin
-Out
+Vin
DC / DC
Converter
+Out
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 4.7µF capacitors at the output.
+
DC Power
Source
-
-Vin
+Vin
Single Output
DC / DC
Converter
-Out
+Out
+
DC Power
Source
-
-Vin
+Vin
+Out
Dual Output
DC / DC
Com.
Converter
-Out
Cout
Cout
Load
Load
Cout
Load
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 270µF maximum capacitive load for dual outputs, 680µF capacitive load for
12V & 15V outputs and 6800µF 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 100℃.
The derating curves are determined from measurements obtained in a test setup.
Position of air velocity
probe and thermocouple
15mm / 0.6in
50mm / 2in
Air Flow
DUT
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