Figure 1. Simplifi ed Schematic
COMMON
+V
OUT
+V
IN
–V
IN
PWM
CONTROLLER ISOLATION REFERENCE &
ERROR AMP
UVLO & OVLO
COMPARATORS
ON/OFF
CONTROL
TRIM
CASE
Typical topology is shown
Typical unit
FEATURES
Higher operating temperatures
Fully potted
Designed to meet UL1950 and
EN60950-1 (basic insulation)
mark available (75V-input models)
Fully isolated, 1500Vdc guaranteed
25/30/35/40W output power
Standard pinout! Smaller size!
New 2" x 3" package fi ts 3" x 3" footprint
5V, 12V or 15V outputs
Four input voltage ranges:
10-36V, 18-36V
18-75V, 36-75V
High effi ciency (to 85%)
Input under and overvoltage lockout
VOUT trim and on/off control
Modifi cations and customs for OEMs
DATEL’s UMP Models are fully potted, 25-40 Watt DC/
DC converters designed to meet UL1950 and EN60950-
1 safety standards. The combination of the UMP's
higher effi ciencies and thermally conductive potting
compound enables these devices to achieve higher
operating temperatures without derating. The 2" x 3"
UMP "footprint" conforms with the standard pinout
and pin geometries of most 3" x 3" devices (a 33%
space savings) while delivering as much as 60% more
power (40W vs. 25W).
Applicable to a wide range of telecom, computer
and other OEM applications, UMP Model DC/DC’s
operate from four input voltage ranges (10-36V for
"Q12" models, 18-36V for "D24" models, 18-75V for
"Q48" models, and 36-75V for "D48" models). Avail-
able output voltages are 5, 12 and 15 Volts.
For reliability and affordability, DATEL exploits
contemporary, high-speed, automatic assembly to
construct the UMP’s traditional, fi eld-proven, SMT-
on-pcb designs. Devices employ corrosion-resistant
metal cases with plastic headers. Heat generating
transformer cores and power semiconductors are
mounted directly to the cases, which have threaded
inserts for add-on heat sinks or pcb mounting. De-
vices are specifi ed for –40 to +100°C operation and
derating information is provided for operation with/
without heat sinks and forced air fl ow.
All devices feature input pi fi lters, input undervolt-
age and overvoltage shutdown, output overvoltage
protection, output current limiting, and thermal
shutdown. UL, CSA, EN and IEC compliance testing is
available (75V-input devices will be CE marked) as are
full EMI/EMC characterizations.
PRODUCT OVERVIEW
SIMPLIFIED BLOCK DIAGRAM
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 1 of 9
www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
OBSOLETE PRODUCT
Last time buy: 04 January 2013
7
6
8
9
4
1
2
3
510
METAL
CASE
BOTTOM VIEW
INSULATED
BASE
(4) THREADED INSERTS
#4-40 THD THRU
1.200
(30.48)
2.500
(63.50)
2.04
(51.82)
0.20 MIN
(5.08)
1.600
(40.64)
4 EQ. SP. @
0.400 (10.16)
0.55
(13.97)
0.040 ±0.002 DIA.
(1.016 ±0.051)
2.600
(66.04) 0.22
(5.59)
0.22
(5.59)
0.27
(6.86)
0.42
(10.67)
3.04
(77.22)
DIMENSIONS ARE IN INCHES (MM)
UMP-5/5-Q12 5 5 75 100 ±0.5% ±1% 24 10-36 50/1366 77% 79% C11, P14
UMP-5/6-Q48 5 6 80 110 ±0.5% ±1% 48 18-75 25/799 79% 80% C11, P14
UMP-5/7-D24 5 7 75 100 ±0.5% ±1% 24 18-36 25/1796 82% 83% C11, P14
UMP-5/8-D48 5 8 75 100 ±0.5% ±1% 48 36-75 25/1026 82% 84% C11, P14
UMP-12/2.1-Q12 12 2.1 100 150 ±0.5% ±1% 24 10-36 50/1326 80% 82% C11, P14
UMP-12/2.5-Q48 12 2.5 100 150 ±0.5% ±1% 48 18-75 30/770 82% 83% C11, P14
UMP-12/3-D24 12 3 100 150 ±0.5% ±1% 24 18-36 25/1825 82% 84% C11, P14
UMP-12/3.3-D48 12 3.3 100 150 ±0.5% ±1% 48 36-75 25/1004 83% 85% C11, P14
UMP-15/1.7-Q12 15 1.7 100 150 ±0.5% ±1% 24 10-36 50/1341 80% 82% C11, P14
UMP-15/2-Q48 15 2 100 150 ±0.5% ±1% 48 18-75 30/770 82% 83% C11, P14
UMP-15/2.5-D24 15 2.5 100 150 ±0.5% ±1% 24 18-36 25/1879 83% 84% C11, P14
UMP-15/2.65-D48 15 2.65 100 150 ±0.5% ±1% 48 36-75 25/1008 83% 85% C11, P14
UMP Model DC/DC Converters are classifi ed, by output power, into 25,
30, 35 and 40 Watt devices. For the single-output devices listed above, the
maximum available output power is the product of the nominal output voltage
and the maximum allowable output current indicated within the part number
(see Part Number Structure). A UMP-5/6-Q48, for example, can source
6 Amps from its 5V output (over its entire 18-75V input voltage range) deliv-
ering an output power of 30 Watts. A UMP-5/8-D48 can deliver
40 Watts.
Case C11
Output Confi guration:
U = Unipolar
Nominal Output Voltage:
5, 12 or 15 Volts
5U MP 8
-/D48
-
INPUT VOLTAGE RANGE:
Q12 = 10-36 Volts (24V nominal)
D24 = 18-36 Volts (24V nominal)
Q48 = 18-75 Volts (48V nominal)
D48 = 36-75 Volts (48V nominal)
Maximum Output Current
in Amps
Fully Potted Metal Package
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth.
➂ 10 to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
➄ RoHS-6 compliance does not claim EU RoHS exemption 7b–lead in solder.
Performance Specifi cations and Ordering Guide
R/N (mVp-p) ➁
Load ➂
VOUT
(Volts)
Package
(Case,
Pinout)
Effi ciency
Regulation (Max.)
Line
VIN Nom.
(Volts)
Range
(Volts)
Model
IIN ➃
(mA)
➀
Max.
Typ. Typ.
Min.
IOUT
(Amps)
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
Output Input
OUTPUT POWER CONSIDERATIONS
I/O Connections
Pin Function P14
1 No Pin
2 –Input
3 +Input
4 Case **
5 On/Off Control*
6 No Pin
7 No Pin
8 Common
9 +VOUT
10 Trim
* See note 3 on next page.
** The case must be grounded
for most applications.
3.00
(76.20)
2.600
(66.04)
0.20
(5.08)
0.10
(2.54)
0.120 DIA. (3.048)
(4 PLACES)
0.40
(10.16)
0.50
(12.70)
1.200
(30.48)
2.00
(50.80)
TOP VIEW
MATERIAL: BLACK ANODIZED ALUMINUM
4 MOUNTING SCREWS AND 0.009 (0.229) THERMAL PAD INCLUDED
RoHS-6 hazardous substance
compliant (Note 5)
C
* Contact Murata Power Solutions
(Datel) for availability.
-
Optional Heat Sink Kit
(Part Number HS-23 <non-RoHS> or HS-23-C <RoHS>)
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 2 of 9
www.murata-ps.com/support
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Range:
Q12 Models 10-36 Volts (24V nominal)
D24 Models 18-36 Volts (24V nominal)
Q48 Models 18-75 Volts (48V nominal)
D48 Models 36-75 Volts (48V nominal)
Undervoltage Lockout:
Q12 Models 9 Volts
D24 Models 17 Volts
Q48 Models 17 Volts
D48 Models 34 Volts
Input Current See Ordering Guide
Input Filter Type ➁ Pi
Overvoltage Shutdown:
D24 and Q12 Models 40 Volts
D48 and Q48 Models 80 Volts
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
On/Off Control (Pin 5) ➂ TTL high (or open) = on, low = off
Output
VOUT Accuracy (50% load) ±1%, maximum
Temperature Coeffi cient ±0.02% per °C
Ripple/Noise (20MHz BW) See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage 1500Vdc, minimum
Isolation Capacitance 130pF
Current Limiting Continuous, auto-recovery
Overvoltage Protection Zener/transorb clamp, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 200µsec max. to ±1.5% of fi nal value
Switching Frequency 165kHz (±10%)
Environmental
Operating Temperature (ambient):
Without Derating –40 to +50°C (model dependent)
With Derating to +100°C (See Derating Curves)
Maximum Case Temperature +100°C
Storage Temperature –40 to +105°C
Relative Humidity To 85°C /85% RH, non-condensing
Physical
Safety UL/cUL/EN/IEC 60950-1
Dimensions 2.04" x 3.04" x 0.55" (51.8 x 77.2 x 14mm)
Shielding 5-sided
Case Connection Pin 4
Case Material Aluminum, black anodized fi nish
with plastic header
Flammability Rating UL94V-0
Pin Material Gold-plated copper alloy with nickel
underplate
Weight 6 ounces (170 grams)
➀ These converters require a minimum 10% output loading to maintain specifi ed regulation.
Operation under no-load conditions will not damage these devices; however they may not
meet all listed specifi cations.
➁ Deleted.
➂ Applying voltage to the Control pin with no input power applied can damage the converter.
➃ Listed spec is for input-to-output. Input-to-case and output-to-case isolation is 1000Vdc min.
Input Voltage:
Q12/D24 Models 44 Volts
Q48/D48 Models 88 Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection
5V Outputs 6.8 Volts, limited duration
12V Outputs 15 Volts, limited duration
15V Outputs 18 Volts, limited duration
Output Current Current limited. Max. current and
short-circuit duration are model
dependent.
Storage Temperature –40 to +105°C
Lead Temperature (soldering, 10 sec.) +300°C
These are stress ratings. Exposure of devices to greater than any of these
conditions may adversely affect long-term reliability. Proper operation under
conditions other than those listed in the Performance/Functional Specifi cations
Table is not implied.
Absolute Maximum Ratings
TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating." Us-
ers may ground either the Common (pin 8) for normal usage or the positive
side (+Output, pin 9) to effectively reverse the output polarity.
Filtering and Noise Reduction
All UMP 25-40 Watt DC/DC Converters achieve their rated ripple and noise
specifi cations without the use of external input/output capacitors. In critical
applications, input/output ripple and noise may be further reduced by install-
ing electrolytic capacitors across the input terminals and/or low-ESR tanta-
lum or electrolytic capacitors across the output terminals. The caps should
be located as close to the power converters as possible. Typical values are
listed in the tables below. In many applications, using values greater than
those listed will yield better results.
To Reduce Input Ripple
Q12/D24 Models 47µF, 50V
Q48/D48 Models 10µF, 100V
To Reduce Output Ripple
5V Outputs 47µF, 10V, Low ESR
12/15V Outputs 22µF, 20V, Low ESR
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL UMP
DC/DC Converters, you should use slow-blow type fuses with values no
greater than the following:
V
IN Range Fuse Value
Q12 4A
D24 4A
Q48 3A
D48 2A
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 3 of 9
www.murata-ps.com/support
Output Power (Watts)
Ambient Temperature (°C)
25
20
15
10
5
0
–40 0 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Output Power (Watts)
Ambient Temperature (°C)
25
20
15
10
5
0
–40 0 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Efficiency (%)
Out
p
ut Current
(
Am
p
s
)
0.56 1.11 1.67 2.22 2.78 3.33 3.89 4.44 5
80
75
70
65
60
55
50
45
82.5
Efficiency @ 10V
IN
Efficiency @ 12V
IN
Efficiency @ 24V
IN
Efficiency @ 36V
IN
Output Power (Watts)
Ambient Tem
p
erature
(
°C
)
30
25
20
15
10
5
0
–40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Output Power (Watts)
Ambient Temperature (°C)
–40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
30
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Efficiency (%)
Output Current (Amps)
0.67 1.33 2 2.67 3.33 4 4.67 5.33 6
86
82
78
74
70
66
62
Efficiency @ 18V
IN
Efficiency @ 24V
IN
Efficiency @ 48V
IN
Efficiency @ 72V
IN
Figure 2a. Temperature Derating Without Heat Sink
Figure 2b. Temperature Derating With Heat Sink
Figure 2c. Effi ciency vs. Output Current and Input Voltage
Figure 3a. Temperature Derating Without Heat Sink
Figure 3b. Temperature Derating With Heat Sink
Figure 3c. Effi ciency vs. Output Current and Input Voltage
Temperature Derating and Electrical Performance Curves
Q48 Models (30 Watts)Q12 Models (25 Watts)
Model UMP-5/6-Q48
Model UMP-5/5-Q12
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 4 of 9
www.murata-ps.com/support
Output Power (Watts)
Ambient Temperature (°C)
35
30
25
20
15
10
5
0
–40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Output Power (Watts)
Ambient Temperature (°C)
35
30
25
20
15
10
5
0
–40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
40
35
30
25
20
15
10
5
0
Output Power (Watts)
Ambient Temperature (°C)
–40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Efficiency (%)
Output Current (Amps)
0.5 1 2 3 4 5 6 7 8
88
86
84
82
80
78
76
74
72
70
68
Efficiency @ 36V
IN
Efficiency @ 48V
IN
Efficiency @ 72V
IN
Figure 4a. Temperature Derating Without Heat Sink
Figure 4b. Temperature Derating With Heat Sink
Figure 4c. Effi ciency vs. Output Current and Input Voltage
Figure 5a. Temperature Derating Without Heat Sink
Figure 5b. Temperature Derating With Heat Sink
Figure 5c. Effi ciency vs. Output Current and Input Voltage
Model UMP-5/8-D48Model UMP-5/7-D24
D48 Models (40Watts)D24 Models (35 Watts)
Efficiency (%)
Out
p
ut Current
(
Am
p
s
)
0.77 1.56 2.33 3.11 3.89 4.67 5.44 6.22 7
88
86
84
82
80
78
76
74
Efficiency @ 18V
IN
Efficiency @ 24V
IN
Efficiency @ 36V
IN
Output Power (Watts)
Ambient Temperature (°C)
40
35
30
25
20
15
10
5
0
–40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Temperature Derating and Electrical Performance Curves
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 5 of 9
www.murata-ps.com/support
6
Case Connection
Unlike most other DC/DC converters, UMP DC/DC's do not have their metal
case connected to one of their input pins. The "uncommitted" case is con-
nected to pin 4 which, depending on your system confi guration, must be
connected to earth or chassis ground to ensure reliable operation.
On/Off Control (Standard)
The On/Off Control pin (pin 5) may be used for remote on/off operation. As
shown in Figure 6, the control pin has an internal 10k pull-up resistor to
approximately 10V. The converter is designed so that it is enabled when the
control pin is left open (normal mode) and disabled when the control pin is
pulled low (to less than +0.8V relative to –Input, pin 2).
Dynamic control of the on/off function is best accomplished with a mechani-
cal relay or an open-collector/open-drain drive circuit (optically isolated if
appropriate). The drive circuit should obviously be able to sink approximately
1mA when activated and withstand more than 10 Volts when deactivated.
Applying an external voltage to pin 5 when no input power is applied to the
converter can cause permanent damage to the converter. The on/off control
function, however, is designed such that the converter can be disabled (pin
5 pulled low) while input power is ramping up and then "released" once the
input has stabilized. Under these circumstances, it takes approximately 30ms
for the output of the fully loaded DC/DC to ramp up and settle to within ±1%
of its fi nal value after the converter has been turned on.
Output Trimming
VOUT may be trimmed ±5% via a single trimpot or fi xed resistor. The trimpot
should be connected between +Output (pin 9) and Common (pin 8) with its
wiper connected to pin 10 (Trim). A trimpot can also be used to determine the
value of a single fi xed resistor which can be connected between pin 10 (Trim)
and pin 9 (+Output) to trim "down" the output voltages, or between pins 10
(Trim) and 6 (–Output) to trim "up" the output voltages. Fixed resistors should
be metal-fi lm types with absolute TCR's less than 100ppm/°C to ensure
stability.
Threaded Inserts and Heatsink Installation
CAUTION: Do not use the threaded inserts to bolt the converter down to a
PC board. That will place unnecessary force on the mounting pins. Instead,
the converter is held securely by only soldering the mounting pins.
When attaching the heat sink from above the converter, use a maximum
torque of 2 inch-pounds (0.23 N-m) on the 4-40 bolts to avoid damaging the
threaded inserts. Use a tiny amount of fastener adhesive or 4-40 lockwash-
ers to secure the bolts.
+INPUT
–INPUT
3
2
+10V
10k9
5
ON/OFF
CONTROL
Figure 6. Driving the On/Off Control Pin
Figure 8. Trim Connections Using Fixed Resistors
Figure 7. Trim Connections Using a Trimpot
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Install either a fi xed
trim-up resistor
or a fi xed trim-down
resistor depending upon
desired output voltage.
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UMP Trim Resistor Equations
The equations listed below will set the output to a desired voltage using a
single fi xed trim resistor if you do not prefer to use a potentiometer. Do not
exceed ±5% from the nominal output voltage. Trim resistors should have low
temperature coeffi cients, ±100ppm/°C or less to ensure stability. Adjustment
beyond the specifi ed adjustment range is not recommended. Attach the trim
resistors as close as practical to the converter.
To trim the voltage higher than the nominal output, install the resistor be-
tween the trim pin and –VOUT terminal.
To trim the voltage lower than the nominal output, install the resistor between
the trim pin and +VOUT terminal.
These equations are a starting point. The fi nal output voltage at the load will
vary slightly with load current, distance to the load (and voltage drop), input
voltage, ambient temperature, airfl ow, initial setpoint accuracy and several
other variables. For critical applications, you should measure the actual volt-
age obtained.
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 6 of 9
www.murata-ps.com/support
If you’re designing with EMC in mind, please note that all of DATEL’s UMP
25-40 Watt DC/DC Converters have been characterized for radiated and
conducted emissions in our new EMI/EMC laboratory. Testing is conducted
in an EMCO 5305 GTEM test cell utilizing EMCO automated EMC test
software. Radiated emissions are tested to the limits of FCC Part 15, Class
B and CISPR 22 (EN 55022), Class B. Correlation to other specifi cations can
be supplied upon request. Radiated emissions plots to FCC and CISPR 22
for model UMP-5/8-D48 appear below.
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
FCC Class B Limit
UMP-5/8-D48 Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = +5Vdc @ +6.45 Amps
Radiated Emissions (dBµV/M)
Radiated Emissions
UMP-5/8-D48 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = +5Vdc @ +6.45 Amps
80
70
60
50
40
30
20
10
0
–10
–20
Fre
q
uenc
y
(
MHz
)
100 1000
Radiated Emissions
EN 55022 Class B Limit
Radiated Emissions (dBµV/M)
EMI RADIATED EMISSIONS
Trim Equations
Note: Resistor values are in k. Accuracy of adjustment is subject to
tolerances of resistors and factory-adjusted, initial output accuracy.
VO = desired output voltage. VONOM = nominal output voltage.
50 6/n6/./-
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UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 7 of 9
www.murata-ps.com/support
Quality and Reliability
These models are the latest DC/DC Converters to emerge from DATEL’s new,
company-wide approach to designing and manufacturing the most reliable
power converters available. The fi ve-pronged program draws our Quality
Assurance function into all aspects of new-product design, development,
characterization, qualifi cation and manufacturing.
Design for Reliability
Design for Reliability is woven throughout our multi-phased, new-product-de-
velopment process. Design-for-reliability practices are fully documented and
begin early in the new-product development cycle with the following goals:
1. To work from an approved components/vendors list ensuring the use of
reliable components and the rigorous qualifi cation of new components.
2. To design with safety margins by adhering to a strict set of derating
guidelines and performing theoretical worst-case analyses.
3. To locate potential design weaknesses early in the product-development
cycle by using extensive HALT (Highly Accelerated Life Testing).
4. To prove that early design improvements are effective by employing a
thorough FRACA (Failure Reporting Analysis and Corrective Action) system.
HALT Testing
The goal of the accelerated-stress techniques used by DATEL is to force
device maturity, in a short period of time, by exposing devices to excessive
levels of "every stimulus of potential value." We use HALT (Highly Acceler-
ated Life Testing) repeatedly during the design and early manufacturing
phases to detect potential electrical and mechanical design weaknesses
that could result in possible future fi eld failures.
During HALT, prototype and pre-production DC/DC converters are subjected
to progressively higher stress levels induced by thermal cycling, rate of tem-
perature change, vibration, power cycling, product-specifi c stresses (such as
dc voltage variation) and combined environments. The stresses are not meant
to simulate fi eld environments but to expose any weaknesses in a product’s
electro/mechanical design and/or assembly processes. The goal of HALT is to
make products fail so that device weaknesses can be analyzed and strength-
ened as appropriate. Applied stresses are continually stepped up until products
eventually fail. After corrective actions and/or design changes, stresses are
stepped up again and the cycle is repeated until the "fundamental limit of the
technology" is determined.
DATEL has invested in a Qualmark OVS-1 HALT tester capable of applying
voltage and temperature extremes as well as 6-axis, linear and rotational,
random vibration. A typical HALT profi le (shown above) consists of thermal
cycling (–55 to +125°C, 30°C/minute) and simultaneous, gradually increasing,
random longitudinal and rotational vibration up to 20G’s with load cycling and
applied-voltage extremes added as desired. Many devices in DATEL’s new
A-Series could not be made to fail prior to reaching either the limits of the HALT
chamber or some previously known physical limit of the device. We also use
the HALT chamber and its ability to rapidly cool devices to verify their "cold-
start" capabilities.
Typical HALT Profi le
10 20 30 40 50 60 70 80 90
40
20
0
Random Vibration (G's)
Temperature (°C)
Test Time (minutes)
100
80
60
40
20
0
–20
–40
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 8 of 9
www.murata-ps.com/support
Qualifi cation
For each new product, electrical performance is verifi ed via a comprehen-
sive characterization process and long-term reliability is confi rmed via a rigorous
qualifi cation procedure. The qual procedure includes such strenuous tests as
thermal shock and 500 hour life. Qual testing is summarized below.
Qualifi cation Test Method/Comments
HALT DATEL in-house procedure
High Temperature Storage Max. rated temp., 1,000 hours
Thermal Shock 10 cycles, –55 to +125°C
Temperature/Humidity +85°C, 85% humidity, 48 hours
Lead Integrity DATEL in-house procedure
Life Test +70°C, 500 hours*
Marking Permanency DATEL in-house procedure
End Point Electrical Tests Per product specifi cation
Qualifi cation Testing
* Interim electrical test at 200 hours.
In-Line Process Controls and Screening
A combination of statistical sampling and 100% inspection techniques keeps
our assembly line under constant control. Parameters such as solder-paste
thickness, component placement, cleanliness, etc. are statistically sampled,
charted and fi ne tuned as necessary. Visual inspections are performed by
trained operators after pick-and-place, soldering and cleaning operations.
Units are 100% electrically tested prior to potting. All devices are temperature
cycled, burned-in, hi-pot tested and fi nal-electrical tested prior to external
visual examination, packing and shipping.
Rapid Response to Problems
DATEL employs an outstanding corrective-action system to immediately ad-
dress any detected shortcomings in either products or processes. Whenever
our assembly, quality or engineering personnel spot a product/process prob-
lem, or if a product is returned with a potential defect, we immediately perform
a detailed failure analysis and, if necessary, undertake corrective actions.
Over time, this system has helped refi ne our assembly operation to yield one
of the lowest product defect rates in the industry.
UMP Models
25-40W, Single Output, DC/DC Converters
MDC_UMP25-40W_B04 Page 9 of 9
www.murata-ps.com/support
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without
notice. © 2012 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
