Total Power MJWI25-24D15 Highest power density Datasheet

FEATURES
►Highest Power Density
►1" x 1" x 0.4" Shielded Metal Package
►Wide 2:1 Input Range
►Excellent Efficiency up to 90%
►Operating Temp. Range -40°C to +80°C
►Optional Heatsink
►I/O-isolation Voltage 1500VDC
►Remote On/Off Control
►Over Load Protection
►CSA/UL/IEC/EN 60950-1 (Approval pending)
►3 Year Product Warranty
PRODUCT OVERVIEW
The MJW25 series is the latest range of a new generation of high performance dc-dc converter modules with very high power density.
The product offers fully 25W in a shielded metal package with dimensions of just 1.0”x1.0”x0.4”. All models provide wide 2:1 input range and tightly
regulated output voltage.By state-of-the-art circuit topology a very high efficiency up to 90% could be achieved allowing an operating temperature
range of -40°C to +80°C (with derating).
These converters are qualified for demanding applications in battery operated equipment,instrumentation,data communication,industrial and many other
space critical applications.
Model Selection Guide
Model
Input
Output
Number
Voltage
Voltage
(Range)
VDC
MJW25-12S033
MJW25-12S05
Output Current
Input Current
Reflected
Over
Max. capacitive
Efficiency
Ripple
Voltage
Load
(typ.)
Current
Protection
mA (typ.)
VDC
μF
%
Max.
@Max. Load
@No Load
VDC
mA
mA(typ.)
mA(typ.)
3.3
6000
1900
75
3.9
10300
87
@Max. Load
5
5000
2340
85
6.2
6800
89
MJW25-12S12
12
12
2090
2350
80
15
1200
89
MJW25-12S15
(9 ~ 18)
15
1670
2350
80
18
750
89
MJW25-12D12
±12
±1040
2340
75
±15
680#
89
MJW25-12D15
±15
±840
2360
75
±18
380#
89
MJW25-24S033
3.3
6000
940
55
3.9
10300
88
MJW25-24S05
5
5000
1160
60
6.2
6800
90
12
2090
1160
55
15
1200
90
MJW25-24S12
24
MJW25-24S15
(18 ~ 36)
80
50
15
1670
1160
55
18
750
90
MJW25-24D12
±12
±1040
1170
50
±15
680#
89
MJWI25-24D15
±15
±840
1180
50
±18
380#
89
MJW25-48S033
3.3
6000
470
35
3.9
10300
88
MJW25-48S05
5
5000
580
40
6.2
6800
90
MJW25-48S12
48
12
2090
580
35
15
1200
90
MJW25-48S15
(36 ~ 75)
15
1670
580
35
18
750
90
MJW25-48D12
±12
±1040
585
40
±15
680#
89
MJW25-48D15
±15
±840
590
40
±18
380#
89
30
# For each output
In
Total Power International,
Inc
Toll Free: 877-646-0900
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Tota
Total Power International, Inc.
MJW25 SERIES
DC/DC CONVERTER 25W, Highest Power Density
Input Specifications
Parameter
Input Surge Voltage (100ms max.)
Model
12V Input Models
Min.
24V Input Models
-0.7
Typ.
---
-0.7
Max.
Unit
25
--50
---0.7
100
VDC
12V Input Models
----9
24V Input Models
----18
48V Input Models
----36
None
----30
ms
Nominal Vin and Constant Resistive Load
----30
ms
All Models
LC Filter (for EN55022,Class A or Class B compliance see page 9)
Hiccup Mode, 0.7Hz typ.
48V Input Models
Start-Up Threshold Voltage
Input Polarity Protection
Power Up
Remote On/Off
Start Up Time
Internal Filter Type
Short Circuit Current
Output Specifications
Parameter
Output Voltage Setting Accuracy
Output Voltage Balance
Line Regulation
Load Regulation
Cross Regulation (Dual)
Min.Load
Ripple & Noise (20MHz)
Ripple & Noise (20MHz)
Transient Recovery Time
Temperature Coefficient
Over Load Protection
Short Circuit Protection
Over Voltage Protection
Conditions
At 50% Load and Nominal Vin
Dual Output, Balanced Loads
Vin=Min. to Max.
Single Output
No Load to Full Load
Dual Output
Asymmetrical load 25% / 100% FL
Min.
---
Typ.
---
Max.
±1.0
Unit
%Vnom.
-----------
-----
±2.0
±0.2
±0.2
±1.0
±5.0
%
%
%
%
%
------±0.02
mV P-P
mV P-P
μsec
%/℃
Min.
Typ.
Max.
1500
----1000
--------2000
--285
--MIL-HDBK-217F@25℃, Ground Benign
372,000
----UL/cUL 60950-1 recognition(CSA certificate), IEC/EN 60950-1(CB-scheme)
Unit
VDC
MΩ
pF
KHz
Hours
-------
No minimum Load Requirement
--100
--150
--250
----Current Limitation at 150% typ. of Iout max., Hiccup
Hiccup Automatic Recovery
For Shutdown Voltage see Model Selection Guide
3.3V & 5V Models
12V , 15V & Dual Models
25% Load Step Change
General Specifications
Parameter
I/O Isolation Voltage (rated)
I/O Isolation Resistance
I/O Isolation Capacitance
Switching Frequency
MTBF(calculated)
Safety Approvals(pending)
Conditions
60 Seconds
500 VDC
100KHz, 1V
Input Fuse
12V Input Models
5000mA Slow-Blow Type
24V Input Models
2500mA Slow-Blow Type
48V Input Models
1250mA Slow-Blow Type
Remote On/Off Control
Parameter
Converter On
Converter Off
Control Input Current (on)
Control Input Current (off)
Control Common
Standby Input Current
In
Total Power International,
Inc
Conditions
Vctrl = 5.0V
Vctrl = 0V
Supply Off & Nominal Vin
Min.
3.5V ~ 12V or Open Circuit
0V ~ 1.2V or Short Circuit
----Referenced to Negative Input
---
Toll Free: 877-646-0900
Typ.
Max.
Unit
-----
0.5
-0.5
mA
mA
3
---
mA
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MJW25 SERIES
Total Power International, Inc.
Tota
DC/DC CONVERTER 25W, Highest Power Density
Output Voltage Trim
Parameter
Trim Up / Down Range
Conditions
% of Nominal Output Voltage
Min.
±10
Typ.
---
Max.
---
Unit
%
Environmental Specifications
Parameter
Operating Ambient Temperature Range
(Natural Convection, see Derating)
Thermal Impedance
Case Temperature
Storage Temperature Range
Humidity (non condensing)
Cooling
RFI
Lead Temperature (1.5mm from case for 10Sec.)
Model
Min.
MJW25-24S033, MJW25-48S033
MJW25-24S05, MJW25-24S12
MJW25-24S15, MJW25-48S05
MJW25-48S12, MJW25-48S15
MJW25-12S033
MJW25-12S05, MJW25-12S12,MJW25-12S15
MJW25-12D12, MJW25-12D15
MJW25-24D12, MJW25-24D15
MJW25-48D12, MJW25-48D15
-40
Max.
without Heatsink
57
with Heatsink
65
56
64
53
61
50
59
Unit
℃
Natural Convection without Heatsink
17.6
---
℃/W
Natural Convection with Heatsink
14.8
---
℃/W
100LFM Convection without Heatsink
13.6
---
℃/W
100LFM Convection with Heatsink
8.5
---
℃/W
200LFM Convection without Heatsink
11.8
---
℃/W
200LFM Convection with Heatsink
---
℃/W
400LFM Convection without Heatsink
6.5
8.8
---
℃/W
400LFM Convection with Heatsink
4.3
--+105
+125
95
℃/W
℃
℃
% rel. H
---50
--Free-Air convection
Six-Sided Shielded, Metal Case
---
260
℃
EMC Specifications
Parameter
EMI
ESD
Radiated immunity
Fast transient (See Note 7)
Surge (See Note 7)
Conducted immunity
In
Total Power International,
Inc
Standards & Level
EN55022
EN61000-4-2 air ± 8KV , Contact ± 6KV
EN61000-4-3 10V/m
EN61000-4-4 ±2KV
EN61000-4-5 ±1KV
EN61000-4-6 10V/m
Toll Free: 877-646-0900
Performance
Class A /Class B (See Page 9)
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
Perf. Criteria A
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MJW25 SERIES
Tota
Total Power International, Inc.
DC/DC CONVERTER 25W, Highest Power Density
Power Derating Curve
100
Natural
Convection
20LFM
Output Power (%)
Output Power (%)
80
100LFM
60
200LFM
400LFM
40
20
0
~
-40
0
20
40
60
80
100 110
80
100 110
Ambient Temperature C
MJW25-24S033, MJW25-48S033
Derating Curve without Heatsink
MJW25-24S033, MJW25-48S033
Derating Curve with Heatsink
100
Natural
Convection
20LFM
Output Power (%)
Output Power (%)
80
100LFM
60
200LFM
400LFM
40
20
0
~
-40
0
20
40
60
Ambient Temperature C
MJW25-24S05,MJW25-24S12,MJW25-24S15,MJW25-48S05
MJW25-48S12,MJW25-48S15 Derating Curve without Heatsink
MJW25-24S05,MJW25-24S12,MJW25-24S15,MJW25-48S05
MJW25-48S12,MJW25-48S15 Derating Curve with Heatsink
100
Natural
Convection
20LFM
Output Power (%)
Output Power (%)
80
100LFM
60
200LFM
400LFM
40
20
0
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MJW25-12S033 Derating Curve with Heatsink
MJW25-12S033 Derating Curve without Heatsink
100
Natural
Convection
20LFM
Output Power (%)
Output Power (%)
80
100LFM
60
200LFM
400LFM
40
20
0
~
-40
0
20
40
60
80
100 110
Ambient Temperature C
MJW25-12S05, MJW25-12S12, MJW25-12S15, MJW25-12D12
MJW25-12S05, MJW25-12S12, MJW25-12S15, MJW25-12D12
MJW25-12D15, MJW25-24D12, MJW25-24D15,MJW25-48D12,MJW25-48D15
MJW25-12D15, MJW25-24D12, MJW25-24D15,MJW25-48D12,MJW25-48D15
Derating Curve with Heatsink
Derating Curve without Heatsink
In
Total Power International,
Inc
Toll Free: 877-646-0900
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MJW25 SERIES
Tota
Total Power International, Inc.
DC/DC CONVERTER 25W, Highest Power Density
100
100
90
90
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
80
70
60
80
70
60
9V
50
9V
50
12V
18V
40
10
20
30
40
50
60
70
80
90
12V
18V
40
100
10
20
30
40
% of Full Load
60
70
80
90
100
% of Full Load
MJW25-12S033 Efficiency vs Load Current
MJW25-12S05 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
50
80
70
60
80
70
60
9V
50
9V
50
12V
18V
40
10
20
30
40
50
60
70
80
90
12V
18V
40
100
10
20
30
40
% of Full Load
60
70
80
90
100
% of Full Load
MJW25-12S12 Efficiency vs Load Current
MJW25-12S15 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
50
80
70
60
80
70
60
9V
50
9V
50
12V
18V
40
10
20
30
40
50
60
70
80
90
12V
18V
40
100
10
20
30
40
% of Full Load
60
70
80
90
100
% of Full Load
MJW25-12D12 Efficiency vs Load Current
MJW25-12D15 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
50
80
70
60
80
70
60
18V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
100
18V
50
24V
36V
40
10
% of Full Load
30
40
50
60
70
80
90
% of Full Load
MJW25-24S033 Efficiency vs Load Current
In
Total Power International,
Inc
20
Toll Free: 877-646-0900
MJW25-24S05 Efficiency vs Load Current
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100
MJW25 SERIES
Total Power International, Inc.
Tota
DC/DC CONVERTER 25W, Highest Power Density
100
100
90
90
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
80
70
60
80
70
60
18V
50
18V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
24V
36V
40
100
10
20
30
40
% of Full Load
60
70
80
90
100
% of Full Load
MJW25-24S12 Efficiency vs Load Current
MJW25-24S15 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
50
80
70
60
80
70
60
18V
50
18V
50
24V
36V
40
10
20
30
40
50
60
70
80
90
24V
36V
40
100
10
20
30
40
% of Full Load
60
70
80
90
100
% of Full Load
MJW25-24D12 Efficiency vs Load Current
MJW25-24D15 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
50
80
70
60
80
70
60
36V
50
36V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
48V
75V
40
100
10
20
30
40
% of Full Load
60
70
80
90
100
% of Full Load
MJW25-48S033 Efficiency vs Load Current
MJW25-48S05 Efficiency vs Load Current
100
100
90
90
Efficiency(%)
Efficiency(%)
50
80
70
60
80
70
60
36V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
100
36V
50
48V
75V
40
10
% of Full Load
30
40
50
60
70
80
90
% of Full Load
MJW25-48S12 Efficiency vs Load Current
In
Total Power International,
Inc
20
Toll Free: 877-646-0900
MJW25-48S15 Efficiency vs Load Current
www.total-power.com
100
MJW25 SERIES
Total Power International, Inc.
Tota
DC/DC CONVERTER 25W, Highest Power Density
100
100
90
90
Efficiency(%)
Efficiency(%)
Efficiency Curve @25℃
80
70
60
80
70
60
36V
50
48V
75V
40
10
20
30
40
50
60
70
80
90
100
36V
50
48V
75V
40
10
20
30
40
% of Full Load
50
60
70
80
90
100
% of Full Load
MJW25-48D12 Efficiency vs Load Current
MJW25-48D15 Efficiency vs Load Current
Notes
1
Specifications typical at Ta=+25℃, resistive load, nominal input voltage, rated output current unless otherwise noted.
2
Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%.
3
Ripple & Noise measurement bandwidth is 20 MHz, measured with a 1μF MLCC and a 10μF Tantalum Capatitor.
4
All DC/DC converters should be externally fused at the front end for protection.
5
Other input and output voltage may be available, please contact factory.
6
To order the converter with heatsink, please add a suffix -HS (e.g. MJW25-24S05-HS) to order code.
7
The MJW25 series can meet EN61000-4-4 & EN61000-4-5 by adding a capacitor across the input pins.Suggested capacitor:CHEMI-CON KY 220μF/100V.
8
That “natural convection” is about 20LFM but is not equal to still air (0 LFM).
9
Specifications are subject to change without notice.
Package Specifications
Mechanical Dimensions
Pin Connections
2.54
[0.10]
25.4 [1.00]
10.16
[0.40]
10.16
[0.40]
Bottom View
1
2
6
1.00
[0.04]
20.3 [0.80]
5
25.4 [1.00]
4
3
6.0
10.16 0.5
[0.24] [0.40 0.02]
Pin
Single Output
Dual Output
1
+Vin
+Vin
2
-Vin
-Vin
3
+Vout
+Vout
4
Trim
Common
5
-Vout
-Vout
6
Remote On/Off
Remote On/Off
►All
dimensions in mm (inches)
►Tolerance: X.X±0.25
5.08
[0.20]
7.62
[0.30]
2.54
[0.10]
(X.XX±0.01)
X.XX±0.13 ( X.XXX±0.005)
►Pin
diameter  1.0 ±0.05 (0.04±0.002)
Physical Characteristics
Case Size
:
25.4x25.4x10.16mm (1.0x1.0x0.4 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
:
16.5g
In
Total Power International,
Inc
Toll Free: 877-646-0900
www.total-power.com
MJW25 SERIES
Tota
Total Power International, Inc.
DC/DC CONVERTER 25W, Highest Power Density
Heatsink (Option –HS)
Mechanical Dimensions
Heatsink Material: Aluminum
Finish: Anodic treatment (black)
16.3 [0.64]
Weight: 2g
17.46
[0.69] Max.
►The
31.0 [1.22] Max.
advantages of adding a heatsink are:
1.To help heat dissipation and increase the stability
and reliability of DC/DC converters at high
operating temperature atmosphere.
Heat-Sink
Thermal Pad
Clamp
Converter
2.To upgrade the operating temperature of DC/DC
converters, please refer to Derating Curve.
External Output Trimming
Output can be externally trimmed by using the method shown below
Rd
Ru
3
4
5
3
2
1
6
2
6
Trim Down
Trim Up
MJW25-XXS033 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
63.59
5
MJW25 Module
Bottom View
MJW25 Module
Bottom View
1
4
2
Vox0.98
30.28
3
Vox0.97
18.19
4
Vox0.96
11.95
5
Vox0.95
8.13
6
Vox0.94
5.56
7
Vox0.93
3.70
8
Vox0.92
2.31
9
Vox0.91
1.21
10
Vox0.90
0.34
%
Volts
KOhms
2
Vox1.02
29.28
3
Vox1.03
16.87
4
Vox1.04
10.90
5
Vox1.05
7.38
6
Vox1.06
5.06
7
Vox1.07
3.42
8
Vox1.08
2.20
9
Vox1.09
1.25
10
Vox1.10
0.49
%
Volts
KOhms
2
Vox0.98
20.61
3
Vox0.97
12.31
4
Vox0.96
8.15
5
Vox0.95
5.66
6
Vox0.94
4.00
7
Vox0.93
2.81
8
Vox0.92
1.92
9
Vox0.91
1.23
10
Vox0.90
0.68
%
Volts
KOhms
Trim up
1
Vout=
Vox1.01
Ru=
36.57
MJW25-XXS12 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
394.50
2
Vox1.02
16.58
3
Vox1.03
9.92
4
Vox1.04
6.59
5
Vox1.05
4.59
6
Vox1.06
3.25
7
Vox1.07
2.30
8
Vox1.08
1.59
9
Vox1.09
1.03
10
Vox1.10
0.59
%
Volts
KOhms
2
Vox0.98
179.74
3
Vox0.97
106.08
4
Vox0.96
68.86
5
Vox0.95
46.39
6
Vox0.94
31.36
7
Vox0.93
20.60
8
Vox0.92
12.51
9
Vox0.91
6.21
10
Vox0.90
1.17
%
Volts
KOhms
Trim up
1
Vout=
Vox1.01
Ru=
368.92
MJW25-XXS15 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
572.67
2
Vox1.02
161.92
3
Vox1.03
94.97
4
Vox1.04
61.86
5
Vox1.05
42.12
6
Vox1.06
29.00
7
Vox1.07
19.66
8
Vox1.08
12.66
9
Vox1.09
7.23
10
Vox1.10
2.89
%
Volts
KOhms
2
Vox0.98
248.63
3
Vox0.97
145.60
4
Vox0.96
94.97
5
Vox0.95
64.87
6
Vox0.94
44.92
7
Vox0.93
30.72
8
Vox0.92
20.10
9
Vox0.91
11.86
10
Vox0.90
5.28
%
Volts
KOhms
2
Vox1.02
182.12
3
Vox1.03
108.73
4
Vox1.04
71.43
5
Vox1.05
48.85
6
Vox1.06
33.71
7
Vox1.07
22.86
8
Vox1.08
14.69
9
Vox1.09
8.33
10
Vox1.10
3.23
%
Volts
KOhms
Trim up
1
Vout=
Vox1.01
Ru=
70.50
MJW25-XXS05 Trim Table
Trim down
1
Vout=
Vox0.99
Rd=
45.53
Trim up
Vout=
Ru=
1
Vox1.01
392.98
In
Total Power International,
Inc
Toll Free: 877-646-0900
www.total-power.com
MJW25 SERIES
Total Power International, Inc.
Tota
DC/DC CONVERTER 25W, Highest Power Density
EMI-Filter to meet EN 55022, class A, class B; FCC part 15 ,level A
Conducted and radiated emissions EN55022 Class A, Class B
Class
Class A
Class B
Model
C1
C2
C3
C4&C5
L1
MJW25-12XXX
None
3.3μF/25V 1210 MLCC
None
None
1μH
MJW25-24XXX
None
3.3μF/50V 1210 MLCC
None
None
2.2μH
MJW25-48XXX
None
3.3μF/100V 1210 MLCC
None
None
4.7μH
MJW25-12XXX
3.3μF/25V 1210 MLCC
3.3μF/25V 1210 MLCC
3.3μF/25V 1210 MLCC
1800 pF/2KV 1206 MLCC
1μH
MJW25-24XXX
3.3μF/50V 1210 MLCC
3.3μF/50V 1210 MLCC
3.3μF/50V 1210 MLCC
1800 pF/2KV 1206 MLCC
2.2μH
MJW25-48XXX
3.3μF/100V 1210 MLCC
3.3μF/100V 1210 MLCC
3.3μF/100V 1210 MLCC
1800 pF/2KV 1206 MLCC
4.7μH
In
Total Power International,
Inc
Toll Free: 877-646-0900
www.total-power.com
Total Power International, Inc.
Tota
MJW25 SERIES
DC/DC CONVERTER 25W, 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
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 6) during a logic low is -500uA. The maximum allowable leakage current
of a switch connected to the on/off terminal (Pin 6) at logic high (3.5V to 12V) is 10mA.
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
DC Power
Source
-
+Out
Single Output
DC / DC
Converter
-Vin
Cout
Load
-Out
Maximum Capacitive Load
The MJW25 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
50mm / 2in
15mm / 0.6in
In
Total Power International,
Inc
Air Flow
DUT
Toll Free: 877-646-0900
www.total-power.com