all converter caty11429174401

®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
FEATURES
►Smallest Encapsulated 40W Converter
►Ultra-compact 2" X 1" Package
►Ultra-wide 4:1 Input Voltage Range
►Fully Regulated Output Voltage
►Excellent Efficiency up to 91%
►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 MKWI40 series is the latest 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 ultra-wide 4:1 input voltage
range and precisely regulated output voltages.
Advanced circuit topology provides a very high efficiency up to 91% which allows an operating temperature range of -40°C to +80°C. Further features
include remote On/Off, trimmable output voltage, under-voltage lockout 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
MKWI40-24S033
MKWI40-24S05
MKWI40-24S12
MKWI40-24S15
MKWI40-24S24
MKWI40-24D12
MKWI40-24D15
MKWI40-48S033
MKWI40-48S05
MKWI40-48S12
MKWI40-48S15
MKWI40-48S24
MKWI40-48D12
MKWI40-48D15
Input
Voltage
(Range)
Output
Voltage
VDC
VDC
3.3
5
12
15
24
±12
±15
3.3
5
12
15
24
±12
±15
24
(9 ~ 36)
48
(18 ~ 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
mA
0
0
0
0
0
±145
±110
0
0
0
0
0
±145
±110
mA(typ.)
1240
1850
1870
1870
1835
1890
1890
620
930
930
930
918
950
950
mA(typ.)
90
90
95
105
115
65
65
55
55
60
65
75
45
45
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
μF
21000
13600
2400
1500
600
1200#
750#
21000
13600
2400
1500
600
1200#
750#
30
20
Efficiency
(typ.)
@Max. Load
%
89
90
89
89
91
88
88
89
90
90
90
91
88
88
# For each output
Input Specifications
Parameter
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
Short Circuit Current
E-mail:[email protected]
2015/01/23 REV:9
Min.
-0.7
-0.7
--------None
-----
Typ.
--------8.3
16.5
Max.
50
100
9
18
-----
--30
--30
All Models
Internal LC Filter
--- (Hiccup Mode 1.5 Hz typ, 24V Output Model:0.3 Hz typ.)
Nominal Vin and Constant Resistive Load
Tel:886-6-2923150
Page 1 of 11
Unit
VDC
ms
ms
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
Output Specifications
Parameter
Conditions
Output Voltage Setting Accuracy
Min.
Typ.
Max.
Unit
---
---
±1.0
%Vnom.
Output Voltage Balance
Dual Output, Balanced Loads
---
---
±2.0
%
Line Regulation
Vin=Min. to Max. @Full Load
---
---
±0.5
%
Single Output
---
---
±0.5
%
Dual Output
---
---
±1.0
%
---
---
±5.0
%
Load Regulation
Min. Load to Full Load
Load Cross Regulation (Dual Output)
Asymmetrical Load 25%/100% Full Load
Minimum Load
No Minimum Load Requirement for Single Output Models, for dual Output Models see Table
Ripple & Noise
0-20 MHz Bandwidth
Transient Recovery Time
3.3V & 5V Models
---
---
100
mV P-P
12V, 15V & 24V Models
---
---
150
mV P-P
Dual Output Models
---
---
150
mV P-P
---
250
---
μsec
---
±3
±5
%
---
---
±0.02
%/℃
25% Load Step Change
Transient Response Deviation
Temperature Coefficient
Over Current Protection
Current Limitation at 150% typ. of Iout max., Hiccup
Short Circuit Protection
Hiccup Automatic Recovery
Over Voltage Protection
For Shutdown Voltage see Model Selection Guide
General Specifications
Parameter
Conditions
Min.
Typ.
Max.
Unit
60 Seconds
1500
---
---
VDC
I/O Isolation Resistance
500 VDC
1000
---
---
MΩ
I/O Isolation Capacitance
100KHz, 1V
---
---
1500
pF
24Vo Models
---
285
---
KHz
Other Models
---
320
---
I/O Isolation Voltage
Switching Frequency
MTBF(calculated)
[email protected], Ground Benign
Safety Approvals
328,000
KHz
Hours
UL/cUL 60950-1 recognition (CSA certificate), IEC/EN 60950-1(CB-report)
Remote On/Off Control
Parameter
Conditions
Converter On
Min.
Typ.
Max.
Unit
3.5V ~ 12V or Open Circuit
Converter Off
0V ~ 1.2V or Short Circuit
Control Input Current (on)
Vctrl = 5.0V
---
0.5
---
mA
Control Input Current (off)
Vctrl = 0V
---
-0.5
---
mA
---
2.5
---
mA
Unit
Control Common
Referenced to Negative Input
Standby Input Current
Nominal Vin
Output Voltage Trim
Parameter
Conditions
Trim Up / Down Range (9)
% of Nominal Output Voltage
E-mail:[email protected]
2015/01/23 REV:9
Tel:886-6-2923150
Page 2 of 11
Min.
Typ.
Max.
24Vo Models
+20 / -10
---
---
Other Models
±10
---
---
%
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
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.
MKWI40-XXS033
MKWI40-24S05, MKWI40-48S05
MKWI40-48S12, MKWI40-48S15
MKWI40-24S12, MKWI40-24S15
MKWI40-24S24, MKWI40-48S24
MKWI40-24D12, MKWI40-24D15
MKWI40-48D12, MKWI40-48D15
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
51
61
45
57
57
66
40
52
12.0
10.0
9.0
5.4
8.0
4.5
6.0
3.0
---
Shutdown Temperature
-50
--Free-Air convection
Six-Sided Shielded, Metal Case
---
Unit
℃
℃/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
E-mail:[email protected]
2015/01/23 REV:9
Tel:886-6-2923150
Page 3 of 11
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
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
Power Derating Curve
100
100
Natural
Convection
20LFM
100LFM
60
200LFM
400LFM
40
Natural
Convection
20LFM
80
Output Power (%)
Output Power (%)
80
100LFM
60
200LFM
400LFM
40
20
20
0
0
~
-40
0
20
40
60
80
~
-40
100 110
0
20
Ambient Temperature C
MKWI40-24S033,MKWI40-48S033 Derating Curve without Heatsink
100 110
100LFM
60
200LFM
400LFM
40
Natural
Convection
20LFM
80
Output Power (%)
Output Power (%)
80
100
Natural
Convection
20LFM
80
20
100LFM
60
200LFM
400LFM
40
20
0
0
~
-40
0
20
40
60
80
100 110
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
Ambient Temperature C
MKWI40-24S05,MKWI40-48S05, MKWI40-48S12, MKWI40-48S15
Derating Curve without Heatsink
MKWI40-24S05,MKWI40-48S05, MKWI40-48S12, MKWI40-48S15
Derating Curve with Heatsink
100
100
Output Power (%)
Natural
Convection
20LFM
80
Output Power (%)
60
MKWI40-24S033,MKWI40-48S033 Derating Curve with Heatsink
100
100LFM
60
200LFM
400LFM
40
20
80
Natural
Convection
20LFM
60
100LFM
40
400LFM
200LFM
20
0
0
~
-40
0
20
40
60
80
100 110
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
Ambient Temperature C
MKWI40-24S12,MKWI40-24S15 Derating Curve without Heatsink
MKWI40-24S12,MKWI40-24S15 Derating Curve with Heatsink
100
100
Natural
Convection
20LFM
100LFM
60
200LFM
400LFM
40
Natural
Convection
20LFM
80
Output Power (%)
80
Output Power (%)
40
Ambient Temperature C
20
100LFM
60
200LFM
400LFM
40
20
0
0
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKWI40-24D12,MKWI40-24D15, MKWI40-48D12, MKWI40-48D15
Derating Curve without Heatsink
E-mail:[email protected]
2015/01/23 REV:9
Tel:886-6-2923150
Page 4 of 11
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKWI40-24D12,MKWI40-24D15, MKWI40-48D12, MKWI40-48D15
Derating Curve with Heatsink
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
Power Derating Curve
100
100
Natural
Convection
20LFM
100LFM
60
200LFM
400LFM
40
Natural
Convection
20LFM
80
Output Power (%)
Output Power (%)
80
20
100LFM
60
200LFM
400LFM
40
20
0
0
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKWI40-24S24,MKWI40-48S24 Derating Curve without Heatsink
E-mail:[email protected]
2015/01/23 REV:9
Tel:886-6-2923150
Page 5 of 11
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MKWI40-24S24,MKWI40-48S24 Derating Curve with Heatsink
®
MKWI40 SERIES
DC/DC CONVERTER 40W, 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
MKWI40-24S033 Efficiency vs Load Current
MKWI40-24S05 Efficiency vs Load Current
100
90
90
Efficiency(%)
100
Efficiency(%)
40
80
70
60
80
70
60
9V
9V
50
50
24V
36V
40
10
20
30
40
50
60
70
80
90
24V
36V
40
10
100
20
30
50
60
70
80
90
100
% of Full Load
% of Full Load
MKWI40-24S12 Efficiency vs Load Current
MKWI40-24S15 Efficiency vs Load Current
100
90
90
Efficiency(%)
100
Efficiency(%)
40
80
70
60
80
70
60
9V
9V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
Efficiency(%)
90
80
70
60
9V
50
24V
36V
40
40
50
60
70
80
90
100
% of Full Load
MKWI40-24D15 Efficiency vs Load Current
E-mail:[email protected]
2015/01/23 REV:9
20
30
40
50
60
70
80
90
MKWI40-24D12 Efficiency vs Load Current
100
30
36V
40
% of Full Load
MKWI40-24S24 Efficiency vs Load Current
20
24V
10
100
% of Full Load
10
50
Tel:886-6-2923150
Page 6 of 11
100
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
100
100
90
90
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
80
70
60
80
70
60
18V
18V
50
50
48V
75V
40
10
20
30
40
50
60
70
80
90
48V
75V
40
10
100
20
30
50
60
70
80
90
100
% of Full Load
% of Full Load
MKWI40-48S033 Efficiency vs Load Current
MKWI40-48S05 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
40
80
70
60
80
70
60
18V
50
18V
50
48V
48V
75V
40
75V
40
10
20
30
40
50
60
70
80
90
100
10
20
30
% of Full Load
40
50
60
70
80
90
100
% of Full Load
MKWI40-48S12 Efficiency vs Load Current
MKWI40-48S15 Efficiency vs Load Current
100
100
90
Efficiency(%)
Efficiency(%)
90
80
70
80
70
60
18V
60
18V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
50
48V
75V
40
10
20
30
40
50
60
70
80
90
100
% of Full Load
100
% of Full Load
MKWI40-48S24 Efficiency vs Load Current
MKWI40-48D12 Efficiency vs Load Current
100
Efficiency(%)
90
80
70
60
18V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
100
% of Full Load
MKWI40-48D15 Efficiency vs Load Current
E-mail:[email protected]
2015/01/23 REV:9
Tel:886-6-2923150
Page 7 of 11
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
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.MKWI40-12S05-HS) to order code.
To order the converter without Remote On/Off function, please add a suffix -N (e.g.MKWI40-12S05-N) to order code.
To meet EN61000-4-4 & EN61000-4-5 an external capacitor across the input pins is required. Suggested capacitor: CHEMI-CON KXG 330μF/200V.
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
5.08 5.08
10.16
[0.40]
[0.20] [0.20]
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
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
10.16
[0.40]
4
10.16
[0.40]
2.54
[0.10]
5.5
[0.22]
T
25.4 [1.00]
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
E-mail:[email protected]
2015/01/23 REV:9
Tel:886-6-2923150
Page 8 of 11
►All dimensions in mm
►Tolerance: X.X±0.25
(inches)
(X.XX±0.01)
X.XX±0.13 ( X.XXX±0.005)
► Pin
diameter  1.0 ±0.05 (0.04±0.002)
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
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
heatsink are:
1. To improve heat dissipation and increase the
stability and reliability of the DC/DC converters at
high operating temperatures.
31.0 [1.22]Max
Heat-sink
Thermal pad
2. To increase operating temperature of the DC/DC
converter, please refer to Derating Curve.
Clamp
Converter
EMI Filter meets Conducted EMI EN55022 class A; FCC part 15 level A
Part No.
C1
C2
C3
C4
MKWI40-24SXX
4.7μF/50V 1812 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
None
E-mail:[email protected]
2015/01/23 REV:9
MKWI40-48SXX
2.2μF/100V 1812 MLCC
1000pF/2KV 1808 MLCC
1000pF/2KV 1808 MLCC
None
Tel:886-6-2923150
Page 9 of 11
MKWI40-24DXX
4.7μF/50V 1812 MLCC
1000pF/2KV 1808 MLCC
None
1000pF/2KV 1808 MLCC
MKWI40-48DXX
2.2μF/100V 1812 MLCC
1000pF/2KV 1808 MLCC
None
1000pF/2KV 1808 MLCC
®
MKWI40 SERIES
DC/DC CONVERTER 40W, Highest Power Density
External Output Trimming
Output can be externally trimmed by using the method shown below
MKWI40-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
MKWI40-XXS05 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
138.88
Trim up
Vout=
Ru=
1
Vox1.01
106.87
MKWI40-XXS12 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
413.55
Trim up
Vout=
Ru=
1
Vox1.01
351.00
MKWI40-XXS15 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
530.73
Trim up
Vout=
Ru=
1
Vox1.01
422.77
MKWI40-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]
2015/01/23 REV:9
Tel:886-6-2923150
Page 10 of 11
®
MKWI40 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
Resistive
Load
+Out
Dual Output
DC / DC
Converter
Com.
-Vin
Copper Strip
Copper Strip
+Vin
Scope
Cout
Resistive
Load
Copper Strip
Cout
-Out
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 4.7V to 12V. The maximum sink current at the on/off terminal (Pin 3) during a logic low is -100μA. The maximum allowable
leakage current of a switch connected to the on/off terminal (Pin 3) at logic high (2.5V to 100V) is 5μA.
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 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
Load
-Out
+Vin
DC Power
Source
-
+Out
Dual Output
DC / DC Com.
Converter
-Vin
-Out
Cout
Load
Load
Cout
Maximum Capacitive Load
The MKWI40 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:9
Page 11 of 11