The MINMAX MKZI20 series is a new range of high performance 20W isolated dc-dc converter within encapsulated 2"x1" package which specifically design
for railway applications. There are 12 models available for railway input voltage of either 24(9~36)VDC or 48(18~75)VDC or 72/110(40~160)VDC and tight
output voltage regulation. Further features include over current, over voltage, short circuit protection, remote ON/OFF, output trim and EMI filter meets
EN55022 & FCC Part15 Class A as well. MKZI20 series conform to vibration and thermal shock test meets EN61373, cooling, dry and damp heat test
meets IEC/EN 60068-2 and railway EMC standard EN50121-3-2 and complies also with railway standard EN50155 (IEC60571). MKZI20 series offer an
highly reliable solution for critical applications in railway systems, battery-powered equipment, measure instrumentation and many critical applications.
Model Selection Guide
Model
Number
Input
Voltage
(Range)
VDC
MKZI20-24S05
MKZI20-24S12
MKZI20-24S15
MKZI20-24S24
MKZI20-48S05
MKZI20-48S12
MKZI20-48S15
MKZI20-48S24
MKZI20-110S05
MKZI20-110S12
MKZI20-110S15
MKZI20-110S24
24
( 9 ~ 36 )
Output
Voltage
VDC
5
12
15
24
5
12
15
24
5
12
15
24
Output Current
Max.
mA
4000
1670
1330
833
4000
1670
1330
833
4000
1670
1330
833
Input Current
@Max. Load
mA(typ.)
980
960
955
957
490
474
472
473
219
212
211
213
@No Load
mA(typ.)
25
Over
Voltage
Protection
VDC
6.2
15
18
27
6.2
15
18
27
6.2
15
18
27
Max. capacitive
Load
μF
6800
1200
750
300
6800
1200
750
300
6800
1200
750
300
Efficiency
(typ.)
@Max. Load
%
85
87
87
87
85
88
88
88
83
86
86
85
48
( 18 ~ 75 )
15
110
( 40 ~ 160 )
10
Input Specifications
Parameter
Input Surge Voltage (100ms. max)
Model
24V Input Models
48V Input Models
110V Input Models
24V Input Models
48V Input Models
110V Input Models
24V Input Models
48V Input Models
110V Input Models
All Models
Min.
-0.7
-0.7
-0.7
---
---
---
---
---
---
---
Typ.
Max.
50
---
100
---
170
---
---
9
---
18
---
40
7.5
---
16
---
37
---
50
--
Internal Pi Type
Unit
Start-Up Threshold Voltage
VDC
Under Voltage Shutdown
Start Up Time
Input Filter
mS
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2015/03/23
P6
Page 1 of 8
®
Output Specifications
Parameter
Output Voltage Setting Accuracy
Line Regulation
Load Regulation
Minimum Load
5Vo
Ripple & Noise
0-20 MHz
Bandwidth
12Vo,15Vo
24Vo
25% Load Step Change
(2)
Vin=Min. to Max. @ Full Load
Min. Load to Full Load
Measured with a
10μF/25V MLCC
Measured with a
4.7μF/50V MLCC
Conditions
Min.
---
---
---
No minimum Load Requirement
---
---
---
---
---
---
Current Limitation at 150% typ. of Iout max., Hiccup
Hiccup Mode 0.7Hz typ.
50
100
150
---
±3
---
Typ.
---
---
---
MKZI20 SERIES
DC/DC CONVERTER 20W,
Reinforced Insulation, Railway Standard
Max.
±1.0
±0.2
±0.5
---
---
---
300
±5
±0.02
Unit
%
%
%
mV
P-P
mV
P-P
mV
P-P
μsec
%
%/℃
Transient Recovery Time
Transient Response Deviation
Temperature Coefficient
Over Current Protection
Short Circuit Protection
General Specifications
Parameter
I/O Isolation Voltage (60 sec.)
Isolation Voltage Input/Output to case
I/O Isolation Resistance
I/O Isolation Capacitance
Switching Frequency
MTBF(calculated)
Safety Standards
MIL-HDBK-217F@25℃ Full Load, Ground Benign
500 VDC
100KHz, 1V
Conditions
Min.
2250
1500
1000
---
---
cUL/UL 60950-1, IEC/EN 60950-1, IEC/EN 50155
Typ.
---
---
---
1500
320
TBD
Max.
---
---
---
---
---
Unit
VDC
VDC
MΩ
pF
KHz
Hours
Remote On/Off Control
Parameter
Converter On
Converter Off
Control Input Current (on)
Control Input Current (off)
Control Common
Standby Input Current
Nominal Vin
Vctrl = 5.0V
Vctrl = 0V
Conditions
Min.
3.5V ~ 12V or Open Circuit
0V ~ 1.2V or Short Circuit
---
---
Referenced to Negative Input
---
2.5
---
mA
0.5
-0.5
---
---
mA
mA
Typ.
Max.
Unit
Output Voltage Trim
Parameter
Trim Up / Down Range (See Page 8)
Conditions
% of Nominal Output Voltage
Min.
±10
Typ.
---
Max.
---
Unit
%
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2015/03/23
P6
Page 2 of 8
®
MKZI20 SERIES
DC/DC CONVERTER 20W,
Reinforced Insulation, Railway Standard
Environmental Specifications
Parameter
Operating Temperature Range
Natural Convection
(8)
Nominal Vin, Load 100% Inom.
(for Power Derating see relative Derating Curves)
Model
MKZI20-48S12, MKZI20-48S15, MKZI20-48S24
MKZI20-24S12, MKZI20-24S15, MKZI20-24S24
MKZI20-110S12, MKZI20-110S15
MKZI20-24S05, MKZI20-48S05, MKZI20-110S24
MKZI20-110S05
Natural Convection without Heatsink
Natural Convection with Heatsink
100LFM Convection without Heatsink
Thermal Impedance
100LFM Convection with Heatsink
200LFM Convection without Heatsink
200LFM Convection with Heatsink
400LFM Convection without Heatsink
400LFM Convection with Heatsink
Case Temperature
Storage Temperature Range
Cooling Test
Dry Heat
Damp Heat
Shock & Vibration Test
Operating Humidity (non condensing)
RFI
Lead Temperature (1.5mm from case for 10Sec.)
Compliance to IEC/EN60068-2-1
Compliance to IEC/EN60068-2-2
Compliance to IEC/EN60068-2-30
Compliance to IEC/EN 61373
---
Six-Sided Shielded, Metal Case
---
260
℃
95
% rel. H
12.1
9.8
9.2
5.4
7.8
4.5
5.2
3.0
---
-50
-40
Min.
Max.
without Heatsink
72
69
66
62
55
---
---
---
---
---
---
---
---
+105
+125
with Heatsink
78
76
73
70
65
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃/W
℃
℃
℃
Unit
EMC Specifications
Parameter
General
EMI
Conduction
EN55024
ESD
EMS
Radiated immunity
Fast transient
(7)
Surge
(7)
Conducted immunity
EN61000-4-2 air ± 8kV , Contact ± 6kV
EN61000-4-3 10V/m
EN61000-4-4 ±2kV
EN61000-4-5 ±2kV
EN61000-4-6 10Vrms
A
A
A
A
A
Standards & Level
Compliance with EN 50121-3-2 Railway Applications
EN55022, EN55011, FCC part 15
Class A
Performance
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2015/03/23
P6
Page 3 of 8
®
Power Derating Curve
100
MKZI20 SERIES
DC/DC CONVERTER 20W,
Reinforced Insulation, Railway Standard
100
Natural
Convection
20LFM
80
80
Natural
Convection
20LFM
100LFM
200LFM
400LFM
Output Power (%)
Output Power (%)
100LFM
60
200LFM
400LFM
40
60
40
20
20
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
MKZI20-48S12, 48S15, 48S24 Derating Curve without Heatsink
100
MKZI20-48S12, 48S15, 48S24 Derating Curve with Heatsink
100
80
Natural
Convection
20LFM
Output Power (%)
80
Natural
Convection
20LFM
100LFM
200LFM
400LFM
Output Power (%)
100LFM
60
200LFM
400LFM
40
60
40
20
20
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
MKZI20-24S12, 24S15, 24S24 Derating Curve without Heatsink
100
MKZI20-24S12, 24S15, 24S24 Derating Curve with Heatsink
100
80
Natural
Convection
20LFM
100LFM
80
Natural
Convection
20LFM
100LFM
200LFM
400LFM
Output Power (%)
Output Power (%)
60
200LFM
400LFM
60
40
40
20
20
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
MKZI20-110S12, 110S15 Derating Curve without Heatsink
100
MKZI20-110S12, 110S15 Derating Curve with Heatsink
100
80
Natural
Convection
20LFM
200LFM
400LFM
Output Power (%)
80
Natural
Convection
20LFM
100LFM
200LFM
400LFM
Output Power (%)
100LFM
60
60
40
40
20
20
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
MKZI20-24S05, 48S05, 110S24 Derating Curve without Heatsink
MKZI20-24S05, 48S05, 110S24 Derating Curve with Heatsink
E-mail:sales@minmax.com.tw
Tel:886-6-2923150
2015/03/23
P6
Page 4 of 8
®
MKZI20 SERIES
DC/DC CONVERTER 20W,
Reinforced Insulation, Railway Standard
Power Derating Curve
100
100
80
Natural
Convection
20LFM
Output Power (%)
80
Natural
Convection
20LFM
100LFM
200LFM
400LFM
Output Power (%)
100LFM
60
200LFM
400LFM
40
60
40
20
20
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
0
-40
~
0
20
40
60
80
100
110
Ambient Temperature C
MKZI20-110S05 Derating Curve without Heatsink
MKZI20-110S05 Derating Curve with Heatsink
Notes
1
2
3
4
5
6
7
8
9
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%.
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 "A" Pinning, please add a
suffix A
(e.g. MKZI20-24S05A) to order code.
To order the converter with heatsink, please add a
suffix –HS
(e.g. MKZI20-24S05-HS, MKZI20-24S05A-HS) to order code.
To meet EN61000-4-4 & EN61000-4-5 an external capacitor across the input pins is required.Suggested capacitor:TBD
That “natural convection” is about 20LFM but is not equal to still air (0 LFM).
Specifications are subject to change without notice.
