all converter caty11429174383

®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
FEATURES
►Smallest Encapsulated 40W Converter
►Ultra-compact 2" X 1" Package
►Wide 2:1 Input Voltage Range
►Fully Regulated Output Voltage
►Excellent Efficiency up to 92%
►I/O Isolation 1500 VDC
►Operating 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 MKW40 series is a new generation of high performance dc-dc converter modules setting a new standard concerning power density. The
product offers fully 40W in an encapsulated, shielded metal package with dimensions of just 2.0"x1.0"x0.4". All models provide wide 2:1 input voltage range
and precisely regulated output voltages.
Advanced circuit topology provides a very high efficiency up to 92% which allows an operating temperature range of -40°C to +80°C. 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
MKW40-12S033
MKW40-12S05
MKW40-12S12
MKW40-12S15
MKW40-12S24
MKW40-12D12
MKW40-12D15
MKW40-24S033
MKW40-24S05
MKW40-24S12
MKW40-24S15
MKW40-24S24
MKW40-24D12
MKW40-24D15
MKW40-48S033
MKW40-48S05
MKW40-48S12
MKW40-48S15
MKW40-48S24
MKW40-48D12
MKW40-48D15
Input
Voltage
(Range)
Output
Voltage
VDC
VDC
3.3
5
12
15
24
±12
±15
3.3
5
12
15
24
±12
±15
3.3
5
12
15
24
±12
±15
12
(9 ~ 18)
24
(18 ~ 36)
48
(36 ~ 75)
Output Current
Input Current
Max.
Min.
@Max. Load
@No Load
mA
8000
8000
3330
2670
1670
±1670
±1330
8000
8000
3330
2670
1670
±1670
±1330
8000
8000
3330
2670
1670
±1670
±1330
mA
0
0
0
0
0
±145
±110
0
0
0
0
0
±145
±110
0
0
0
0
0
±145
±110
mA(typ.)
2470
3750
3750
3700
3670
3790
3790
1220
1830
1830
1830
1835
1870
1870
610
920
910
910
918
940
940
mA(typ.)
120
160
160
150
160
70
60
75
80
85
75
85
50
45
40
50
50
50
50
65
65
Reflected
Ripple
Current
Over
Voltage
Protection
Max. capacitive
Load
mA (typ.)
VDC
3.9
6.2
15
18
30
±15
±18
3.9
6.2
15
18
30
±15
±18
3.9
6.2
15
18
30
±15
±18
μF
21000
13600
2400
1500
600
1200#
750#
21000
13600
2400
1500
600
1200#
750#
21000
13600
2400
1500
600
1200#
750#
50
30
20
@Max. Load
# For each output
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Efficiency
(typ.)
%
89
89
89
90
91
88
88
90
91
91
91
91
89
89
90
91
92
92
91
89
89
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
Input Specifications
Parameter
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
Input Surge Voltage (1 sec. max.)
Start-Up Threshold Voltage
Under Voltage Shutdown
Input Polarity Protection
Power Up
Start Up Time
Remote On/Off
Input Filter
Short Circuit Current
Min.
-0.7
-0.7
-0.7
-------------
Typ.
------------8.3
16.5
33
Max.
25
50
100
9
18
36
-------
Unit
VDC
None
--30
--30
All Models
Internal LC Type
--- (Hiccup Mode 1.5 Hz typ, 24V Output Model:0.3 Hz typ.)
Nominal Vin and Constant Resistive Load
-----
ms
ms
Output Specifications
Parameter
Output Voltage Setting Accuracy
Output Voltage Balance
Line Regulation
Load Regulation
Load Cross Regulation (Dual Output)
Minimum Load
Ripple & Noise
Transient Recovery Time
Transient Response Deviation
Temperature Coefficient
Over Current Protection
Short Circuit Protection
Over Voltage Protection
Conditions
Min.
---------
Typ.
---------
Max.
±1.0
Dual Output, Balanced Loads
±2.0
Vin=Min. to Max. @Full Load
±0.5
Single Output
±0.5
Min. Load to Full Load
Dual Output
----±1.0
Asymmetrical Load 25%/100% Full Load
----±5.0
No Minimum Load Requirement for Single Output Models, for dual Output Models see Table
3.3V & 5V Output Models
--100
--0-20 MHz Bandwidth
12V, 15V & 24V Models
--150
--Dual Output Models
--150
----250
--25% Load Step Change
--±3
±5
----±0.02
Current Limitation at 150% typ. of Iout max., Hiccup
Hiccup Automatic Recovery
For Shutdown Voltage see Model Selection Guide
Unit
%Vnom.
%
%
%
%
%
mV P-P
mV P-P
mV P-P
μsec
%
%/℃
General Specifications
Parameter
I/O Isolation Voltage
I/O Isolation Resistance
I/O Isolation Capacitance
Conditions
Min.
Typ.
Max.
60 Seconds
1500
----500 VDC
1000
----100KHz, 1V
----1500
24Vo Models
--285
--Other Models
--320
[email protected], Ground Benign
328,000
UL/cUL 60950-1 recognition (CSA certificate), IEC/EN 60950-1(CB-report)
Switching Frequency
MTBF(calculated)
Safety Approvals
Unit
VDC
MΩ
pF
KHz
KHz
Hours
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
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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
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
Output Voltage Trim
Parameter
Conditions
% of nominal output voltage (24Vo Models)
% of nominal output voltage (Other Models)
Trim Up / Down Range(9)
Min.
+20 / -10
±10
Typ.
-----
Max.
-----
Unit
%
Environmental Specifications
Parameter
Model
Operating Temperature Range
Natural Convection (10)
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.)
Min.
MKW40-XXS033
MKW40-XXS05
MKW40-XXS12
MKW40-XXS15
MKW40-XXS24
MKW40-XXDXX
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
Max.
without Heatsink
with Heatsink
66
73
-40
46
Shutdown Temperature
-50
--Free-Air convection
Six-Sided Shielded, Metal Case
---
℃
57
40
12.0
10.0
9.0
5.4
8.0
4.5
6.0
3.0
---
Unit
52
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃
----------------+105
110℃ typ.
+125
95
℃
% rel. H
℃
260
EMC Specifications
Parameter
Standards & Level
Conduction
EN55024
ESD
Radiated immunity
Fast transient (8)
Surge (8)
Conducted immunity
EMI
EMS
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Tel:886-6-2923150
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Performance
EN55022, FCC part 15
Class A (See Page 9)
EN61000-4-2 air ± 8kV , Contact ± 6kV
EN61000-4-3 10V/m
EN61000-4-4 ±2kV
EN61000-4-5 ±1kV
EN61000-4-6 10Vrms
B
A
A
B
A
®
MKW40 SERIES
DC/DC CONVERTER 40W, 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
100LFM
60
200LFM
400LFM
40
20
20
0
0
~
-40
0
20
40
60
100 110
80
~
-40
0
20
Ambient Temperature C
MKW40-XXS033 Derating Curve without Heatsink
100 110
80
100
Natural
Convection
20LFM
100LFM
60
Natural
Convection
20LFM
80
Output Power (%)
80
Output Power (%)
60
MKW40-XXS033 Derating Curve with Heatsink
100
200LFM
400LFM
40
100LFM
60
200LFM
400LFM
40
20
20
0
0
~
-40
0
20
40
60
80
~
-40
100 110
0
20
40
60
80
100 110
Ambient Temperature ]
Ambient Temperature C
MKW40-XXS05, MKW40-XXS12, MKW40-XXS15,MKW40-XXS24
Derating Curve without Heatsink
MKW40-XXS05, MKW40-XXS12, MKW40-XXS15, MKW40-XXS24
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
100LFM
60
200LFM
400LFM
40
20
20
0
0
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKW40-XXDXX Derating Curve without Heatsink
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Tel:886-6-2923150
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~
-40
0
20
40
60
80
100 110
Ambient Temperature ]
MKW40-XXDXX Derating Curve with Heatsink
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
100
100
90
90
80
80
70
70
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
60
50
40
30
9V
20
10
20
30
40
50
60
70
80
90
40
30
9V
12V
10
18V
0
50
20
12V
10
60
18V
0
100
10
20
30
% of Full Load
90
80
80
70
70
Efficiency(%)
Efficiency(%)
100
90
60
50
40
30
9V
20
10
50
60
80
90
100
70
80
90
60
50
40
30
9V
12V
10
18V
0
40
70
20
12V
30
60
MKW40-12S05 Efficiency vs Load Current
100
20
50
% of Full Load
MKW40-12S033 Efficiency vs Load Current
10
40
18V
0
100
10
20
30
% of Full Load
40
50
60
70
80
90
100
% of Full Load
MKW40-12S12 Efficiency vs Load Current
MKW40-12S15 Efficiency vs Load Current
100
100
90
90
80
70
60
50
40
30
9V
20
10
0
10
20
30
40
50
60
70
80
90
Efficiency(%)
Efficiency(%)
80
70
60
50
40
30
12V
20
18V
10
9V
12V
18V
0
100
10
% of Full Load
20
30
40
50
60
70
80
90
100
% of Full Load
MKW40-12D12 Efficiency vs Load Current
100
100
90
90
80
80
70
70
Efficiency(%)
Efficiency(%)
MKW40-12S24 Efficiency vs Load Current
60
50
40
30
9V
20
12V
10
18V
0
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKW40-12D15 Efficiency vs Load Current
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2015/01/23 REV:19
Tel:886-6-2923150
Page 5 of 10
60
50
40
30
18V
20
24V
10
36V
0
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKW40-24S033 Efficiency vs Load Current
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
100
100
90
90
80
80
70
70
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
60
50
40
30
60
50
40
30
18V
20
10
10
20
30
40
50
60
70
80
90
24V
10
36V
0
18V
20
24V
36V
0
100
10
20
30
% of Full Load
90
80
80
70
70
Efficiency(%)
Efficiency(%)
100
90
60
50
40
30
18V
20
10
50
60
70
80
90
40
30
18V
24V
36V
0
100
10
20
30
90
80
80
70
70
Efficiency(%)
Efficiency(%)
100
60
50
40
30
18V
20
10
0
70
80
90
30
18V
24V
36V
0
100
10
20
30
80
70
70
Efficiency(%)
Efficiency(%)
90
80
60
50
40
30
36V
20
48V
10
75V
0
60
70
80
90
100
% of Full Load
MKW40-48S033 Efficiency vs Load Current
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2015/01/23 REV:19
50
60
70
80
90
100
MKW40-24D15 Efficiency vs Load Current
100
50
40
% of Full Load
90
40
100
40
100
30
90
50
MKW40-24D12 Efficiency vs Load Current
20
80
60
% of Full Load
10
70
10
36V
60
60
20
24V
50
50
MKW40-24S24 Efficiency vs Load Current
90
40
40
% of Full Load
100
30
100
50
MKW40-24S15 Efficiency vs Load Current
20
90
60
% of Full Load
10
80
10
36V
0
40
70
20
24V
30
60
MKW40-24S12 Efficiency vs Load Current
100
20
50
% of Full Load
MKW40-24S05 Efficiency vs Load Current
10
40
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Page 6 of 10
60
50
40
30
36V
20
48V
10
75V
0
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKW40-48S05 Efficiency vs Load Current
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
100
100
90
90
80
80
70
70
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
60
50
40
30
36V
20
10
20
30
40
50
60
70
80
90
40
30
36V
48V
10
75V
0
50
20
48V
10
60
75V
0
10
100
20
30
40
50
60
70
80
90
100
% of Full Load
% of Full Load
MKW40-48S12 Efficiency vs Load Current
MKW40-48S15 Efficiency vs Load Current
100
100
90
90
80
Efficiency(%)
Efficiency(%)
80
70
60
50
40
30
20
10
0
70
60
50
40
30
36V
20
48V
10
75V
0
36V
48V
75V
10
10
20
30
40
50
60
70
80
90
100
20
30
40
50
60
70
80
90
100
% of Full Load
% of Full Load
MKW40-48S24 Efficiency vs Load Current
MKW40-48D12 Efficiency vs Load Current
100
90
Efficiency(%)
80
70
60
50
40
30
36V
20
48V
10
75V
0
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKW40-48D15 Efficiency vs Load Current
Notes
1
2
3
4
5
6
7
8
9
10
11
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 with a 1μF M/C and a 10μF T/C.
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 order the converter with heatsink, please add a suffix –HS (e.g.MKW40-12S05-HS) to order code.
To order the converter without Remote On/Off function, please add a suffix -N (e.g.MKW40-12S05-N) to order code.
To meet EN61000-4-4 & EN61000-4-5 by adding a capacitor across the input pins.Suggested capacitor: CHEMI-CON KXG 330μF/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.
E-mail:[email protected]
2015/01/23 REV:19
Tel:886-6-2923150
Page 7 of 10
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
Package Specifications
Mechanical Dimensions
Pin Connections
5.08 5.08
10.16
[0.40]
1.00 [ 0.04]
1
3.6 [0.14]
Bottom View
1.85
[0.07]
50.8 [2.00]
2
45.72 [1.80]
3
[0.20] [0.20]
Pin
Single Output
Dual Output
1
+Vin
+Vin
2
-Vin
-Vin
3
Remote On/Off
Remote On/Off
4
+Vout
+Vout
5
-Vout
Common
6
Trim
-Vout
T: 11.0mm(0.43 inch) for 24V Output Models
T: 10.2mm(0.40 inch) for Other Output Models
5
6
4
►All dimensions in mm
10.16
[0.40]
10.16
[0.40]
5.5
[0.22]
2.54
[0.10]
T
►Tolerance: X.X±0.25
(X.XX±0.01)
X.XX±0.13 ( X.XXX±0.005)
►Pin
25.4 [1.00]
(inches)
diameter  1.0 ±0.05 (0.04±0.002)
Physical Characteristics
Case Size (24V Output)
:
50.8x25.4x11.0mm (2.0x1.0x0.43 inches)
Case Size (Other Output)
:
50.8x25.4x10.2mm (2.0x1.0x0.40 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
Weight
:
30g
Heatsink (Option –HS)
31.1 [1.22]
Physical Characteristics
Heatsink Material
:
Aluminum
Finish
:
Black Anodized Coating
Weight
:
9g
T: 18.0mm(0.71 inch) for 24V Output Models
T: 17.2mm(0.68 inch) for Other Output Models
T
►The advantages of adding a
31.0 [1.22]Max
Heat-sink
Thermal pad
heatsink are:
1. To improve heat dissipation and increase the
stability and reliability of the DC/DC converters at
high operating temperatures.
Clamp
Converter
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2015/01/23 REV:19
Tel:886-6-2923150
Page 8 of 10
2. To increase operating temperature of the DC/DC
converter, please refer to Derating Curve.
®
MKW40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
EMI Filter meets Conducted EMI EN55022 class A; FCC part 15 level A
Part No.
C1
C2
C3
C4
MKW40-12SXX
MKW40-24SXX
MKW40-48SXX
MKW40-12DXX
MKW40-24DXX
MKW40-48DXX
10μF/25V 1812 MLCC
4.7μF/50V 1812 MLCC
2.2μF/100V 1812 MLCC
10μF/25V 1812 MLCC
4.7μF/50V 1812 MLCC
2.2μF/100V 1812 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
None
None
None
None
None
None
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
External Output Trimming
Output can be externally trimmed by using the method shown below
MKW40-XXS033 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
72.61
2
Vox0.98
32.55
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
Trim up
1
Vout=
Vox1.01
Ru=
60.84
MKW40-XXS05 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
138.88
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
Trim up
1
Vout=
Vox1.01
Ru=
106.87
MKW40-XXS12 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
413.55
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
Trim up
1
Vout=
Vox1.01
Ru=
351.00
MKW40-XXS15 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
530.73
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
Trim up
1
Vout=
Vox1.01
Ru=
422.77
MKW40-XXS24 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
333.39
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
Trim up
Vout=
Ru=
2
Vox1.02
243.70
E-mail:[email protected]
2015/01/23 REV:19
Tel:886-6-2923150
Page 9 of 10
®
MKW40 SERIES
DC/DC CONVERTER 40W, 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
DC / DC
Converter
Current
Probe
Cin
+Out
-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
+Vin
+Out
Copper Strip
Dual Output
DC / DC
Converter
Com.
Copper Strip
-Vin
-Out
Resistive
Load
Copper Strip
Scope
Cout
Cout
Resistive
Load
Scope
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.
Overcurrent 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 33μF for the 12V input devices and 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
-
+Out
Single Output
DC / DC
Converter
DC Power
Source
-Vin
+
Cout
+Vin
DC Power
Source
Load
-Out
-
+Out
Dual Output
DC / DC Com.
Converter
-Vin
-Out
Cout
Load
Load
Cout
Maximum Capacitive Load
The MKW40 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.
2015/01/23 REV:19
Page 10 of 10