MKWI50

®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
FEATURES
►Smallest Encapsulated 50W Converter
►Ultra-compact 2" X 1" Package
►Ultra-wide 4:1 Input Voltage Range
►Fully Regulated Output Voltage
►Excellent Efficiency up to 92%
►I/O Isolation 1500 VDC
►Operating Ambient Temp. Range -40℃ to +80℃
►No Min. Load Requirement
►Overload/Voltage/Temp. and Short Circuit Protection
►Remote On/Off Control, Output Voltage Trim
►Shielded Metal Case with Insulated Baseplate
►UL/cUL/IEC/EN 60950-1 Safety Approval
PRODUCT OVERVIEW
The MINMAX MKWI50 series is the latest generation of high performance dc-dc converter modules setting a new standard concerning power density. The
product offers fully 50W in an encapsulated, shielded metal package with dimensions of just 2.0”x1.0”x0.4”.All models provide ultra-wide 4:1 input voltage
range and precisely regulated output voltages.
A very high efficiency up to 92% which allows an operating temperature range of -40°C to +80°C is achieved by advanced circuit topology . Further features
include remote On/Off, trimmable output voltage, under-voltage shutdown as well as overload and over-temperature protection.
Typical applications for these converters are battery operated equipment, instrumentation, distributed power architectures in communication and industrial
electronics and many other space critical applications.
Model Selection Guide
Model
Number
MKWI50-24S033
MKWI50-24S05
MKWI50-24S12
MKWI50-24S15
MKWI50-24S24
MKWI50-48S033
MKWI50-48S05
MKWI50-48S12
MKWI50-48S15
MKWI50-48S24
Input
Voltage
(Range)
Output
Voltage
VDC
VDC
3.3
5
12
15
24
3.3
5
12
15
24
24
( 9 ~ 36 )
48
( 18 ~ 75 )
Output Current
Input Current
Max.
@Max. Load
@No Load
mA
10000
10000
4170
3330
2080
10000
10000
4170
3330
2080
mA(typ.)
1528
2290
2267
2263
2286
764
1145
1134
1134
1143
mA(typ.)
80
60
80
80
80
40
30
60
60
50
Reflected
Ripple
Current
Over
Voltage
Protection
Max. capacitive
Load
mA(typ.)
VDC
3.9
6.2
15
18
30
3.9
6.2
15
18
30
μF
26000
17000
3000
2000
750
26000
17000
3000
2000
750
40
30
Efficiency
(typ.)
@Max. Load
%
90
91
92
92
91
90
91
92
92
91
Input Specifications
Parameter
Conditions / Model
24V Input Models
48V Input Models
24V Input Models
48V Input Models
24V Input Models
48V Input Models
Input Surge Voltage (100ms. max)
Start-Up Threshold Voltage
Under Voltage Lockout
Input Polarity Protection
Power Up
Start Up Time
Remote On/Off
Input Filter
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2016/06/17
REV:6
Nominal Vin and Constant Resistive Load
All Models
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Page 1 of 10
Min.
-0.7
-0.7
--------None
-----
Typ.
--------7.5
16
Max.
50
100
9
18
-----
--30
--30
Internal LC Type
Unit
VDC
ms
ms
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
Remote On/Off Control
Parameter
Converter On
Converter Off
Control Input Current (on)
Control Input Current (off)
Control Common
Standby Input Current
Conditions
Vctrl = 5.0V
Vctrl = 0V
Nominal Vin
Min.
3.5V ~ 12V or Open Circuit
0V ~ 1.2V or Short Circuit
----Referenced to Negative Input
---
Typ.
Max.
Unit
0.5
-0.5
-----
mA
mA
2.5
---
mA
Max.
±1.0
±0.5
±0.5
Unit
%Vnom.
%
%
100
150
--±5
±0.02
+20 / -10
±10
---
mV P-P
mV P-P
μsec
%
%/℃
%
%
%
Output Specifications
Parameter
Output Voltage Setting Accuracy
Line Regulation
Load Regulation
Minimum Load
Conditions / Model
Min.
Typ.
----Vin=Min. to Max. @Full Load
----Min. Load to Full Load
----No minimum Load Requirement
3.3V & 5V Models(3)
----0-20 MHz Bandwidth
12V, 15V & 24V Models(3)
------250
25% Load Step Change(2)
--±3
----% of nominal output voltage (24Vo Models)
----% of nominal output voltage (Other Models)
----Hiccup
--150
Hiccup Mode 0.3 Hz typ., Automatic Recovery
Ripple & Noise
Transient Recovery Time
Transient Response Deviation
Temperature Coefficient
Trim Up / Down Range (See Page 8 )
Over Load Protection
Short Circuit Protection
General Specifications
Parameter
Conditions
60 Seconds
1 Seconds
500 VDC
100KHz, 1V
Typ.
Max.
--------------2200
285
--MIL-HDBK-217F@25℃, Ground Benign
230,900
UL/cUL 60950-1 recognition (CSA certificate), IEC/EN 60950-1 (CB-report)
I/O Isolation Voltage
I/O Isolation Resistance
I/O Isolation Capacitance
Switching Frequency
MTBF(calculated)
Safety Approvals
Min.
1500
1800
1000
-----
Unit
VDC
VDC
MΩ
pF
KHz
Hours
Environmental Specifications
Parameter
Conditions / Model
Operating Ambient Temperature Range
Natural Convection (8)
Nominal Vin, Load 100% Inom.
(for Power Derating see relative Derating Curves)
Thermal Impedance
Case Temperature
Thermal Protection
Storage Temperature Range
Humidity (non condensing)
Cooling
RFI
Lead Temperature (1.5mm from case for 10Sec.)
E-mail:[email protected]
2016/06/17
REV:6
MKWI50-24S033, MKWI50-48S033
MKWI50-24S12, MKWI50-24S15
MKWI50-48S12, MKWI50-48S15
MKWI50-24S05, MKWI50-24S24
MKWI50-48S05, MKWI50-48S24
Natural Convection without Heatsink
Natural Convection with Heatsink
100LFM Convection without Heatsink
100LFM Convection with Heatsink
200LFM Convection without Heatsink
200LFM Convection with Heatsink
400LFM Convection without Heatsink
400LFM Convection with Heatsink
-40
Max.
without Heatsink with Heatsink
61
69
53
62
46
57
12.1
9.8
9.2
5.4
7.8
4.5
5.2
3.0
---
Shutdown Temperature
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Page 2 of 10
Min.
-50
--Natural convection
Six-Sided Shielded, Metal Case
---
----------------+105
110℃ typ.
+125
95
260
Unit
℃
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃
℃
% rel. H
℃
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
EMC Specifications
Parameter
Standards & Level
Conduction
EN55024
ESD
Radiated immunity
Fast transient (7)
Surge (7)
Conducted immunity
EMI
EMS
Performance
EN55022, FCC part 15
Class A
EN61000-4-2 air ± 8kV , Contact ± 6kV
EN61000-4-3 10V/m
EN61000-4-4 ±2kV
EN61000-4-5 ±1kV
EN61000-4-6 10Vrms
A
A
A
A
A
External Filter meets Conducted EMI EN55022 class A; FCC part 15 level A
Model
MKWI50-24SXX
MKWI50-48SXX
C1
10μF/50V 1210 X7S MLCC
3.3μF/100V 1210 X7S MLCC
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2016/06/17
REV:6
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Page 3 of 10
C2
1000pF/2KV 1206 MLCC
1000pF/2KV 1206 MLCC
L1
1.5μH
6.8μH
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
Power Derating Curve
100
100
Natural
Convection
20LFM
100LFM
60
Natural
Convection
20LFM
80
Output Power (%)
Output Power (%)
80
200LFM
400LFM
40
20
100LFM
60
200LFM
400LFM
40
20
0
0
~
-40
0
20
40
60
80
100 110
~
-40
0
20
Ambient Temperature C
MKWI50-24S033,MKWI50-48S033 Derating Curve without Heatsink
80
100 110
100
Natural
Convection
20LFM
100LFM
60
200LFM
400LFM
40
Natural
Convection
20LFM
80
Output Power (%)
80
Output Power (%)
60
MKWI50-24S033,MKWI50-48S033 Derating Curve with Heatsink
100
20
100LFM
60
200LFM
400LFM
40
20
0
0
~
-40
0
20
40
60
80
100 110
~
-40
0
20
Ambient Temperature C
40
60
80
100 110
Ambient Temperature C
MKWI50-24S12,MKWI50-24S15, MKWI50-48S12, MKWI50-48S15
Derating Curve without Heatsink
MKWI50-24S12,MKWI50-24S15, MKWI50-48S12, MKWI50-48S15
Derating Curve with Heatsink
100
100
Natural
Convection
20LFM
100LFM
60
Natural
Convection
20LFM
80
Output Power (%)
80
Output Power (%)
40
Ambient Temperature C
200LFM
400LFM
40
20
100LFM
60
200LFM
400LFM
40
20
0
0
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKWI50-24S05, MKWI50-24S24, MKWI50-48S05, MKWI50-48S24
Derating Curve without Heatsink
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REV:6
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Page 4 of 10
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKWI50-24S05, MKWI50-24S24, MKWI50-48S05, MKWI50-48S24
Derating Curve with Heatsink
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
100
100
90
90
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
80
70
60
80
70
60
9V
50
9V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
24V
36V
40
100
10
20
30
% of Full Load
50
60
70
80
90
100
% of Full Load
MKWI50-24S033 Efficiency vs Load Current
MKWI50-24S05 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
40
80
70
60
80
70
60
9V
50
9V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
24V
36V
40
100
10
20
30
% of Full Load
50
60
70
80
90
100
% of Full Load
MKWI50-24S12 Efficiency vs Load Current
MKWI50-24S15 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
40
80
70
60
80
70
60
9V
50
18V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
48V
75V
40
100
10
20
30
% of Full Load
50
60
70
80
90
100
% of Full Load
MKWI50-24S24 Efficiency vs Load Current
MKWI50-48S033 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
40
80
70
60
80
70
60
18V
50
18V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
48V
75V
40
100
10
20
30
% of Full Load
50
60
70
80
90
100
% of Full Load
MKWI50-48S05 Efficiency vs Load Current
MKWI50-48S12 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
40
80
70
60
80
70
60
18V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKWI50-48S15 Efficiency vs Load Current
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2016/06/17
REV:6
Tel:886-6-2923150
Page 5 of 10
18V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKWI50-48S24 Efficiency vs Load Current
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
Notes
1
2
3
4
5
6
7
8
9
Specifications typical at Ta=+25℃, resistive load, nominal input voltage, 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 with a 1μF MLCC and a 10μF Tantalum Capatitor.
We recommend to protect the converter by a slow blow fuse in the input supply line.
Other input and output voltage may be available, please contact factory.
To meet EN61000-4-4 & EN61000-4-5 an external capacitor across the input pins is required .Suggested capacitor : 220μF/100V.
Do not exceed maximum power specification when adjusting output voltage.
That “natural convection” is about 20LFM but is not equal to still air (0 LFM).
Specifications are subject to change without notice.
Package Specifications
Mechanical Dimensions
Pin Connections
[0.20] [0.20]
1.00 [ 0.04]
1
2
3.6 [0.14]
Bottom View
1.85
[0.07]
5
6
50.8 [2.00]
3
5.08 5.08
45.72 [1.80]
10.16
[0.40]
Pin
Function
1
+Vin
2
-Vin
3
Remote On/Off
4
+Vout
5
-Vout
6
Trim
4
►All dimensions in mm
10.16
[0.40]
10.16
[0.40]
2.54
[0.10]
5.5
[0.22]
25.4 [1.00]
Physical Characteristics
Case Size
:
50.8x25.4x11.0mm (2.0x1.0x0.43 inches)
Case Material
:
Aluminium Alloy, Black Anodized Coating
Base Material
:
FR4 PCB (flammability to UL 94V-0 rated)
Pin Material
:
Copper Alloy with Gold Plate Over Nickel Subplate
Potting Material
:
Epoxy (UL94-V0)
Weight
:
34g
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REV:6
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Page 6 of 10
11.0
[0.43]
►Tolerance
(inches)
: X.X±0.25 (X.XX±0.01)
X.XX±0.13 ( X.XXX±0.005)
►Pin
diameter  1.0 ±0.05 (0.04±0.002)
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
Heatsink (Option –HS)
31.1 [1.22]
Physical Characteristics
Heatsink Material
:
Aluminum
Finish
:
Black Anodized Coating
Weight
:
9g
18.0 [0.71]Max
31.0 [1.22]Max
Heat-sink
Thermal pad
Clamp
Converter
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REV:6
Tel:886-6-2923150
Page 7 of 10
►The advantages of adding a heatsink are:
1. To improve heat dissipation and increase the stability and
reliability of the DC/DC converters at high operating
temperatures.
2. To increase operating temperature of the DC/DC converter,
please refer to Derating Curve.
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
External Output Trimming
Output can be externally trimmed by using the method shown below
MKWI50 Module
Bottom View
MKWI50 Module
Bottom View
MKWI50-XXS033 Trim Table
Trim down
1
2
Vout=
Vox0.99
Vox0.98
Rd=
72.61
32.55
Trim up
Vout=
Ru=
1
Vox1.01
60.84
MKWI50-XXS05 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
138.88
Trim up
Vout=
Ru=
1
Vox1.01
106.87
MKWI50-XXS12 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
413.55
Trim up
Vout=
Ru=
1
Vox1.01
351.00
MKWI50-XXS15 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
530.73
Trim up
Vout=
Ru=
1
Vox1.01
422.77
MKWI50-XXS24 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
333.39
Trim up
Vout=
Ru=
2
Vox1.02
243.70
3
Vox0.97
19.20
4
Vox0.96
12.52
5
Vox0.95
8.51
6
Vox0.94
5.84
7
Vox0.93
3.94
8
Vox0.92
2.51
9
Vox0.91
1.39
10
Vox0.90
0.50
%
Volts
KOhms
2
Vox1.02
27.40
3
Vox1.03
16.25
4
Vox1.04
10.68
5
Vox1.05
7.34
6
Vox1.06
5.11
7
Vox1.07
3.51
8
Vox1.08
2.32
9
Vox1.09
1.39
10
Vox1.10
0.65
%
Volts
KOhms
2
Vox0.98
62.41
3
Vox0.97
36.92
4
Vox0.96
24.18
5
Vox0.95
16.53
6
Vox0.94
11.44
7
Vox0.93
7.79
8
Vox0.92
5.06
9
Vox0.91
2.94
10
Vox0.90
1.24
%
Volts
KOhms
2
Vox1.02
47.76
3
Vox1.03
28.06
4
Vox1.04
18.21
5
Vox1.05
12.30
6
Vox1.06
8.36
7
Vox1.07
5.55
8
Vox1.08
3.44
9
Vox1.09
1.79
10
Vox1.10
0.48
%
Volts
KOhms
2
Vox0.98
184.55
3
Vox0.97
108.22
4
Vox0.96
70.05
5
Vox0.95
47.15
6
Vox0.94
31.88
7
Vox0.93
20.98
8
Vox0.92
12.80
9
Vox0.91
6.44
10
Vox0.90
1.35
%
Volts
KOhms
2
Vox1.02
157.50
3
Vox1.03
93.00
4
Vox1.04
60.75
5
Vox1.05
41.40
6
Vox1.06
28.50
7
Vox1.07
19.29
8
Vox1.08
12.37
9
Vox1.09
7.00
10
Vox1.10
2.70
%
Volts
KOhms
2
Vox0.98
238.61
3
Vox0.97
141.24
4
Vox0.96
92.56
5
Vox0.95
63.35
6
Vox0.94
43.87
7
Vox0.93
29.96
8
Vox0.92
19.53
9
Vox0.91
11.41
10
Vox0.90
4.92
%
Volts
KOhms
2
Vox1.02
189.89
3
Vox1.03
112.26
4
Vox1.04
73.44
5
Vox1.05
50.15
6
Vox1.06
34.63
7
Vox1.07
23.54
8
Vox1.08
15.22
9
Vox1.09
8.75
10
Vox1.10
3.58
%
Volts
KOhms
2
Vox0.98
148.80
3
Vox0.97
87.26
4
Vox0.96
56.50
5
Vox0.95
38.04
6
Vox0.94
25.73
7
Vox0.93
16.94
8
Vox0.92
10.35
9
Vox0.91
5.22
10
Vox0.90
1.12
%
Volts
KOhms
4
Vox1.04
108.50
6
Vox1.06
63.43
8
Vox1.08
40.90
10
Vox1.1
27.38
12
Vox1.12
18.37
14
Vox1.14
11.93
16
Vox1.16
7.10
18
Vox1.18
3.34
20
Vox1.2
0.34
%
Volts
KOhms
E-mail:[email protected]
2016/06/17
REV:6
Tel:886-6-2923150
Page 8 of 10
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
Order Code Table
Standard
With heatsink
MKWI50-24S033
MKWI50-24S033-HS
MKWI50-24S05
MKWI50-24S05-HS
MKWI50-24S12
MKWI50-24S12-HS
MKWI50-24S15
MKWI50-24S15-HS
MKWI50-24S24
MKWI50-24S24-HS
MKWI50-48S033
MKWI50-48S033-HS
MKWI50-48S05
MKWI50-48S05-HS
MKWI50-48S12
MKWI50-48S12-HS
MKWI50-48S15
MKWI50-48S15-HS
MKWI50-48S24
MKWI50-48S24-HS
E-mail:[email protected]
2016/06/17
REV:6
Tel:886-6-2923150
Page 9 of 10
®
MKWI50 SERIES
DC/DC CONVERTER 50W, Highest Power Density
Test Setup
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with a inductor Lin (4.7μH) and Cin (220μF, ESR < 1.0Ω 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
Current
Probe
Cin
+Out
DC / DC
Converter
-Vin
Load
-Out
Peak-to-Peak Output Noise Measurement Test
Use a 1μF ceramic capacitor and a 10μF tantalum 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
Single Output
DC / DC
Converter
-Vin
Cout
-Out
Scope
Resistive
Load
Copper Strip
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 1.2V. A logic high is 3.5V to 12V. The maximum sink current at the on/off terminal (Pin 3) during a logic low is -100μA.
Overload Protection
To provide hiccup mode protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure overload for an
unlimited duration.
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
Ω at 100 KHz) capacitor of a 10μF for the 24V and 48V devices.
+
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 4.7μF capacitors at the output.
+
+Vin
DC Power
Source
-
+Out
Single Output
DC / DC
Converter
-Vin
Cout
Load
-Out
Maximum Capacitive Load
The MKWI50 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. 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℃. 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
18, Sin Sin Road, An-Ping Industrial District, Tainan 702, Taiwan
Tel: 886-6-2923150 Fax: 886-6-2923149 E-mail: [email protected]
Minmax Technology Co., Ltd.
2016/06/17
REV:6
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