Figure 1. Simplifi ed Schematic
Typical topology is shown
Among the three families of triple-output DC/
DC converters in Murata Power Solutions' new
A-Series, the 8-11W, 2" x 1" devices stand out as
the industry’s smallest full-featured triples. Housed
in miniature 2" x 1" x 0.375", 5-side shielded,
metal packages with electrically non-conductive
coatings, these power converters offer non-latching
output current limiting, input overvoltage shutdown
(except D5A models), input reverse-polarity protec-
tion, and output overvoltage clamping to protect
both the power converters and their loads.
As members of Murata Power Solutions' new
A-Series, the 8-11W triples feature both low cost
and outstanding long-term reliability. Their design
combines straightforward circuit topologies, the
newest components, proven SMT-on-pcb construc-
tion methods, and highly repeatable automatic-
assembly techniques. Their superior durability is
substantiated by a rigorous in-house qualifi cation
program that includes HALT (Highly Accelerated Life
Testing).
Each of these fully line and load-regulated
switching DC/DC converters has a +5V primary
output (with output current as high as 1A) and
either ±12V or ±15V auxiliary outputs (with cur-
rents as high as ±210mA). These devices were
designed to power small analog/digital partitions in
equipment employing distributed-power archi-
tectures with bus voltages between 4.7 and 72
Volts. Applications include computer/networking,
telecom/datacom equipment, industrial instrumen-
tation and automatic test equipment.
PRODUCT OVERVIEW
FEATURES
The smallest, full-featured triples
Low cost! Highly reliable!
Proven SMT-on-pcb construction
Qual tested; HALT tested; EMC tested
Output voltages: +5V/±12V or +5V/±15V
Four input voltage ranges:
4.7-7V, 9-18V, 18-36V or 36-72V
Small packages, 2" x 1" x 0.375"
–40 to +100°C operating temperature
Fully isolated, 1500Vdc guaranteed
Guaranteed effi ciencies to 82%
Designed to meet UL1950 and EN60950
Modifi cations and customs for OEM’s
OPTO
ISOLATION
+5V
–12V (–15V)
ERROR
AMPLIFIER
PWM
CONTROLLER
+V
IN
–
V
IN
+12V (+15V)
COMMON
Typical units
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
MDC_TWR8-11W.D03 Page 1 of 5
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www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Model VOUT
IOUT
(Max.) R/N (mV pk-pk) ➁Regulation
(Max.)
VIN
(Nom.) Range Iin ➃Effi ciency Package
V mA Typ. Max. Line Load ➂V V mA Min. Typ. Case, Pinout
TWR-5/1000-12/125-D5A-C +5 1000 75 100 ±1.0% ±2.0% 5 4.7-7 100/2324 74% 76% C3, P5
±12 ±125 100 150 ±5.0% ±5.0%
TWR-5/1000-12/210-D12A-C +5 1000 75 100 ±1.0% ±2.0% 12 9-18 50/1087 80.5% 82% C3, P5
±12 ±210 100 150 ±5.0% ±5.0%
TWR-5/1000-12/210-D24A-C +5 1000 75 100 ±1.0% ±2.0% 24 18-36 50/534 82% 84% C3, P5
±12 ±210 100 150 ±5.0% ±5.0%
TWR-5/1000-12/210-D48A-C +5 1000 75 100 ±1.0% ±2.0% 48 36-72 50/267 82% 84% C3, P5
±12 ±210 100 150 ±5.0% ±5.0%
TWR-5/800-15/150-D5A-C +5 800 75 100 ±1.0% ±2.0% 5 4.7-7 100/2441 74% 76% C3, P5
±15 ±150 125 175 ±5.0% ±5.0%
TWR-5/1000-15/200-D12A-C +5 1000 75 100 ±1.0% ±2.0% 12 9-18 50/1187 79% 82% C3, P5
±15 ±200 125 175 ±5.0% ±5.0%
TWR-5/1000-15/200-D24A-C +5 1000 75 100 ±1.0% ±2.0% 24 18-36 50/572 82% 84% C3, P5
±15 ±200 125 175 ±5.0% ±5.0%
TWR-5/1000-15/200-D48A-C +5 1000 75 100 ±1.0% ±2.0% 48 36-72 50/286 82% 84% C3, P5
±15 ±200 125 175 ±5.0% ±5.0%
➀ Typical @ TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
➁ 20MHz bandwidth. ±12/15V outputs are specifi ed with 10µF, 25V output capacitors.
➂ 5V output, 10% to 100% load. ±12/15V outputs, balanced loads, 20% to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
PART NUMBER STRUCTURE
TEMPERATURE DERATING
MECHANICAL SPECIFICATIONS
Output
Configuration:
T = Triple
Nominal Auxiliary Output
Voltages (±12 or ±15 Volts)
Wide Range Input
Maximum Primary Output
Current in mA
Maximum Auxiliary Output
Currents in mA from each output
Input Voltage Range:
D5 = 4.7-7 Volts (5V nominal)
D12 = 9-18 Volts (12V nominal)
D24 =18-36 Volts (24V nominal)
D48 = 36-72 Volts (48V nominal)
Nominal Primary Output
Voltage (+5 Volts)
5T WR 1000 15 200
-/-/D12 A
-
A-Series
High Reliability
RoHS-6
compliant*
C
* Contact Murata Power Solutions for availability.
-
METAL CASE
INSULATED BASE
0.040 ±0.002 DIA.
(1.016 ±0.051)
2.00
(50.80)
0.375
(9.53)
0.20 MIN
(5.08)
0.10
(2.54)
1.800
(45.72)
BOTTOM VIEW
0.200
(5.08)
0.800
(20.32)
0.600
(15.24)
0.300
(7.62)
1.00
(25.40)
1
2
4
5
0.10
(2.54)
6
7
Case C3
INPUT/OUTPUT CONNECTIONS
Pin Function P5
1 +Input
2 –Input
3 No Pin
4 +12V/15V Out
5 –12V/15V Out
6 Common
7 +5V Out
Notes:
For "D5A/D12A/D24A" models,
the case is connected to pin 2 (–VIN).
For "D48A" models, the case
is connected to pin 1 (+VIN).
Output Power (Watts)
Ambient Temperature (°C)
–40 0 40 45 50 55 60 65 70 75 80 85 90 95 10
0
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
D
B
C
A
TWR-5/1000-12/125-D5A A
TWR-5/1000-12/210-D12A B
TWR-5/1000-12/210-D24A B
TWR-5/1000-12/210-D48A B
TWR-5/800-15/150-D5A C
TWR-5/1000-15/200-D12A D
TWR-5/1000-15/200-D24A D
TWR-5/1000-15/200-D48A D
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
MDC_TWR8-11W.D03 Page 2 of 5
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 Ranges:
Undervoltage Shutdown ("D24A") 12.25 Volts (typical)
"D5A" Models 4.7-7 Volts (5V nominal)
"D12A" Models 9-18 Volts (12V nominal)
"D24A" Models 18-36 Volts (24V nominal)
"D48A" Models 36-72 Volts (48V nominal)
ediuG gniredrO eeS tnerruC tupnI
Input Filter Type Pi
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
Output
VOUT Accuracy (50% loads):
+5V Output ±0.5%
±12V or ±15V Outputs ±3%
Temperature Coefficient ±0.02% per °C
Ripple/Noise (20MHz BW) See Ordering Guide
Line/Load Regulation See Ordering Guide
Efficiency See Ordering Guide
Isolation Voltage 1500Vdc, minimum
Isolation Capacitance 300pF
Current Limiting Auto-recovery
Overvoltage Protection Zener/transorb clamps, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 200µsec max. to ±2% of final value
Switching Frequency 175kHz
Environmental
Operating Temperature (Ambient):
Without Derating –40 to +60/70°C (Model dependent)
With Derating to +100°C (See Derating Curve)
Storage Temperature –40 to +105°C
0-V49LU ytilibammalF
Physical
Dimensions 2" x 1" x 0.375" (51 x 25 x 9.5mm)
dedis-5 gnidleihS
Case Connection Pin 2 (–VIN)
Case Material Corrosion resistant steel with
kcalb ,desab-yxope ,evitcudnoc-non
etalpesab citsalp dna hsinif lemane
yolla reppoc detalp-dloG
lairetaM niP
)smarg 73( secnuo 3.1 thgieW
These power converters require a minimum 10% loading on their primary output and a
minimum 20% loading on their auxiliary outputs to maintain specified regulation. Operation
under no-load conditions will not damage these devices; however they may not meet all
listed specifications.
Application-specific internal input/output filtering can be recommended or perhaps added
internally upon request. Contact DATEL Applications Engineering for details.
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
On "D48A" models, the case is connected to pin 1 (+VIN).
Input Voltage:
"D5A" Models 10 Volts
"D12A" Models 22 Volts
"D24A" Models 44 Volts
"D48A" Models 80 Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
.dednemmocer gnisuF .ylno noitarud
Output Overvoltage Protection
noitarud detimil ,stloV 8.6 tuptuO V5+
±12V Outputs ±13 Volts, limited duration
±15V Outputs ±16 Volts, limited duration
Output Current Current limited. Max. current and
ledom noitarud tiucric-trohs
.tnedneped
Storage Temperature –40 to +105°C
Lead Temperature (soldering, 10 sec.) +300°C
These are stress ratings. Exposure of devices to any of these conditions may
adversely aect long-term reliability. Proper operation under conditions other
than those listed in the Performance/Functional Specications Table is not
implied.
Absolute Maximum Ratings
TECHNICAL NOTES
Filtering and Noise Reduction
All A-Series TWR 8-11 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
installing electrolytic capacitors across the input terminals and/or low-ESR
tantalum or electrolytic capacitors across the output terminals. Output capaci-
tors should be connected between their respective output pin (pin 4, 5 or 7)
and Common (pin 6) as shown in Figure 2. The caps should be located as close
to the power converters as possible. Typical values are listed below. In many
applications, using values greater than those listed will yield better results.
To Reduce Input Ripple
"D5A" Models 47μF, 10V
"D12A" Models 20μF, 25V
"D24A" Models 20μF, 50V
"D48A" Models 10μF, 100V
To Reduce Output Ripple
+5V Output 47μF, 10V, Low ESR
±12/15V Outputs 22μF, 20V, Low ESR
In critical, space-sensitive applications, Murata Power Solutions may be able
to tailor the internal input/output fi ltering of these units to meet your specifi c
requirements. Contact our Applications Engineering Group for additional details.
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
MDC_TWR8-11W.D03 Page 3 of 5
www.murata-ps.com/support
CUSTOM CAPABILITIES
EMI RADIATED EMISSIONS
+INPUT
–INPUT
+12/15V
1
2
4
6
COMMON
7
C
IN
C
OUT
C
OUT
+
+
+
5
+
C
OUT
+5V
–12/15V
Figure 2. Using External Capacitors
to Reduce Input/Output Ripple/Noise
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For Murata Power Solu-
tions A-Series TWR 8-11 Watt DC/DC Converters, you should use slow-blow
type fuses with values no greater than 3A.
Murata Power Solutions' world-class design, development and manufacturing
team stands ready to work with you to deliver the exact power converter you
need for your demanding, large volume, OEM applications. And ... we’ll do it on
time and within budget!
Our experienced applications and design staffs; quick-turn prototype capabil-
ity; highly automated, SMT assembly facilities; and in-line SPC quality-control
techniques combine to give us the unique ability to design and deliver any
quantity of power converters to the highest standards of quality and reliability.
We have compiled a large library of DC/DC designs that are currently used
in a variety of telecom, medical, computer, railway, aerospace and industrial
applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-effective
power converters available.
If you’re designing with EMC in mind, please note that all of Murata Power
Solutions' TWR 8-11 Watt A-Series 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 TWR-5/1000-12/125-D5A appear below. Published EMC test reports are
available for each model number. Contact Murata Power Solutions' Applications
Engineering Department for more details.
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
FCC Class B Limit
TWR-5/1000-12/125-D5A Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = +5Vdc @ 950mA and ±12Vdc @ ±114mA
Radiated Emissions (dBμV/M)
Radiated Emissions
TWR-5/1000-12/125-D5A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = +5Vdc @ 950mA and ±12Vdc @ ±114mA
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
Radiated Emissions
EN 55022 Class B Limit
Radiated Emissions (dBμV/M)
Quality and Reliability
The A-Series are the fi rst DC/DC Converters to emerge from Murata Power
Solutions' 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, develop-
ment, characterization, qualifi cation and manufacturing.
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
MDC_TWR8-11W.D03 Page 4 of 5
www.murata-ps.com/support
Design for Reliability
Design for Reliability is woven throughout our multi-phased, new-productde-
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 reli-
able components and the rigorous qualifi cation of new components.
2. To design with safety margins by adhering to a strict set of derating guide-
lines 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 thor-
ough FRACA (Failure Reporting Analysis and Corrective Action) system.
HALT Testing
The goal of the accelerated-stress techniques used by Murata Power Solutions
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
Accelerated 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 tempera-
ture 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.
Murata Power Solutions 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, gradu-
ally increasing, random longitudinal and rotational vibration up to 20G’s with
load cycling and applied-voltage extremes added as desired. Many devices in
Murata Power Solutions' new A-Series could not be made to fail prior to reach-
ing 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.
Qualifi cation
For each new product, electrical performance is verifi ed via a comprehensive
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.
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
Typical HALT Profi le
QUALIFICATION TESTING
Qualifi cation Test Method/Comments
HALT Murata Power Solutions 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 Murata Power Solutions in-house procedure
Life Test +70°C, 500 hours*
Marking Permanency Murata Power Solutions in-house procedure
End Point Electrical Tests Per product specifi cation
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
MDC_TWR8-11W.D03 Page 5 of 5
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. © 2015 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/
