TWR Models
www.murata-ps.com
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
Typical units
FEATURES
PRODUCT OVERVIEW
The smallest, full-featured triples
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 protection, 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-
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 efficiencies to 82%
Designed to meet UL1950 and EN60950
Modifications and customs for OEM’s
tion methods, and highly repeatable automaticassembly techniques. Their superior durability is
substantiated by a rigorous in-house qualification
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 currents as high as ±210mA). These devices were
designed to power small analog/digital partitions in
equipment employing distributed-power architectures with bus voltages between 4.7 and 72
Volts. Applications include computer/networking,
telecom/datacom equipment, industrial instrumentation and automatic test equipment.
+VIN
+5V
–VIN
–12V (–15V)
+12V (+15V)
PWM
CONTROLLER
COMMON
OPTO
ISOLATION
ERROR
AMPLIFIER
Figure 1. Simplified Schematic
Typical topology is shown
For full details go to
www.murata-ps.com/rohs
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MDC_TWR8-11W.D03 Page 1 of 5
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Regulation
IOUT
VOUT
R/N (mV pk-pk) ➁
Model
(Max.)
(Max.)
V
mA
Typ.
Max.
Line
Load ➂
+5
±12
+5
±12
+5
±12
+5
±12
+5
±15
+5
±15
+5
±15
+5
±15
TWR-5/1000-12/125-D5A-C
TWR-5/1000-12/210-D12A-C
TWR-5/1000-12/210-D24A-C
TWR-5/1000-12/210-D48A-C
TWR-5/800-15/150-D5A-C
TWR-5/1000-15/200-D12A-C
TWR-5/1000-15/200-D24A-C
TWR-5/1000-15/200-D48A-C
1000
±125
1000
±210
1000
±210
1000
±210
800
±150
1000
±200
1000
±200
1000
±200
75
100
75
100
75
100
75
100
75
125
75
125
75
125
75
125
100
150
100
150
100
150
100
150
100
175
100
175
100
175
100
175
➀ Typical @ TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
➁ 20MHz bandwidth. ±12/15V outputs are specified with 10µF, 25V output capacitors.
PART NUMBER STRUCTURE
±1.0%
±5.0%
±1.0%
±5.0%
±1.0%
±5.0%
±1.0%
±5.0%
±1.0%
±5.0%
±1.0%
±5.0%
±1.0%
±5.0%
±1.0%
±5.0%
VIN
(Nom.)
V
±2.0%
±5.0%
±2.0%
±5.0%
±2.0%
±5.0%
±2.0%
±5.0%
±2.0%
±5.0%
±2.0%
±5.0%
±2.0%
±5.0%
±2.0%
±5.0%
Range
Iin ➃
V
mA
Min.
Typ. Case, Pinout
5
4.7-7
100/2324
74%
76%
C3, P5
12
9-18
50/1087
80.5%
82%
C3, P5
24
18-36
50/534
82%
84%
C3, P5
48
36-72
50/267
82%
84%
C3, P5
5
4.7-7
100/2441
74%
76%
C3, P5
12
9-18
50/1187
79%
82%
C3, P5
24
18-36
50/572
82%
84%
C3, P5
48
36-72
50/286
82%
84%
C3, P5
Efficiency
Package
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.
MECHANICAL SPECIFICATIONS
2.00
(50.80)
T WR - 5 / 1000 - 15 / 200 - D12 A - C
METAL CASE
0.375
(9.53)
RoHS-6
compliant*
Output
Configuration:
T = Triple
A-Series
High Reliability
Wide Range Input
INSULATED BASE
Maximum Primary Output
Current in mA
Nominal Auxiliary Output
Voltages (±12 or ±15 Volts)
Maximum Auxiliary Output
Currents in mA from each output
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.20 MIN
(5.08)
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)
Case C3
1.800
(45.72)
0.10
(2.54)
0.200
(5.08)
4
1
5
2
6
0.300
(7.62)
0.600
(15.24)
0.800
(20.32)
1.00
(25.40)
7
* Contact Murata Power Solutions for availability.
BOTTOM VIEW
TEMPERATURE DERATING
0.10
(2.54)
20
19
TWR-5/1000-12/125-D5A
TWR-5/1000-12/210-D12A
TWR-5/1000-12/210-D24A
TWR-5/1000-12/210-D48A
TWR-5/800-15/150-D5A
TWR-5/1000-15/200-D12A
TWR-5/1000-15/200-D24A
TWR-5/1000-15/200-D48A
18
17
16
Output Power (Watts)
15
14
13
A
B
B
B
C
D
D
D
INPUT/OUTPUT CONNECTIONS
Pin
Function P5
12
11
D
10
B
9
C
8
A
7
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).
6
5
4
3
2
1
0
–40
0
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
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MDC_TWR8-11W.D03 Page 2 of 5
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Absolute Maximum Ratings
Input
Input Voltage Ranges:
"D5A" Models
"D12A" Models
"D24A" Models
"D48A" Models
4.7-7 Volts (5V nominal)
9-18 Volts (12V nominal)
18-36 Volts (24V nominal)
36-72 Volts (48V nominal)
Input Voltage:
"D5A" Models
"D12A" Models
"D24A" Models
"D48A" Models
Undervoltage Shutdown ("D24A")
12.25 Volts (typical)
Input Reverse-Polarity Protection
Input Current
See Ordering Guide
Input Filter Type
Pi
Reverse-Polarity Protection
Yes (Instantaneous, 6A maximum)
Output
Output Overvoltage Protection
+5V Output
±12V Outputs
±15V Outputs
±0.5%
±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
With Derating
–40 to +60/70°C (Model dependent)
to +100°C (See Derating Curve)
Storage Temperature
–40 to +105°C
UL94V-0
Physical
Dimensions
2" x 1" x 0.375" (51 x 25 x 9.5mm)
Shielding
5-sided
Case Connection
Pin 2 (–VIN)
Case Material
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
Pin Material
Gold-plated copper alloy
Weight
1.3 ounces (37 grams)
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).
Current must be <6A. Brief
duration only. Fusing recommended.
6.8 Volts, limited duration
±13 Volts, limited duration
±16 Volts, limited duration
Current limited. Max. current and
short-circuit duration model
dependent.
Output Current
VOUT Accuracy (50% loads):
+5V Output
±12V or ±15V Outputs
Flammability
10 Volts
22 Volts
44 Volts
80 Volts
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 affect long-term reliability. Proper operation under conditions other
than those listed in the Performance/Functional Specifications Table is not
implied.
TECHNICAL NOTES
Filtering and Noise Reduction
All A-Series TWR 8-11 Watt DC/DC Converters achieve their rated ripple and
noise specifications 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 capacitors 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
"D12A" Models
"D24A" Models
"D48A" Models
47μF, 10V
20μF, 25V
20μF, 50V
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 filtering of these units to meet your specific
requirements. Contact our Applications Engineering Group for additional details.
www.murata-ps.com/support
MDC_TWR8-11W.D03 Page 3 of 5
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
+12/15V
EMI RADIATED EMISSIONS
4
+
COUT
1
7
+INPUT
+5V
+
COUT
+
CIN
6
2
COMMON
–INPUT
+
5
COUT
–12/15V
Figure 2. Using External Capacitors
to Reduce Input/Output Ripple/Noise
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 specifications 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.
TWR-5/1000-12/125-D5A Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = +5Vdc @ 950mA and ±12Vdc @ ±114mA
Input Fusing
CUSTOM CAPABILITIES
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!
80
70
60
Radiated Emissions (dBμV/M)
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For Murata Power Solutions A-Series TWR 8-11 Watt DC/DC Converters, you should use slow-blow
type fuses with values no greater than 3A.
FCC Class B Limit
50
40
30
20
10
0
Radiated Emissions
–10
Our experienced applications and design staffs; quick-turn prototype capability; 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.
–20
Frequency (MHz)
TWR-5/1000-12/125-D5A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = +5Vdc @ 950mA and ±12Vdc @ ±114mA
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.
80
70
60
Radiated Emissions (dBμV/M)
Contact us. Our goal is to provide you the highest-quality, most cost-effective
power converters available.
1000
100
50
EN 55022 Class B Limit
40
30
20
10
0
Radiated Emissions
–10
–20
1000
100
Frequency (MHz)
Quality and Reliability
The A-Series are the first DC/DC Converters to emerge from Murata Power
Solutions' new, company-wide approach to designing and manufacturing the
most reliable power converters available. The five-pronged program draws our
Quality Assurance function into all aspects of new-product design, development, characterization, qualification and manufacturing.
www.murata-ps.com/support
MDC_TWR8-11W.D03 Page 4 of 5
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
Design for Reliability
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.
Design for Reliability is woven throughout our multi-phased, new-productdevelopment 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 qualification 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.
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 profile (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
Murata Power Solutions' 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.
Qualification
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 field failures.
During HALT, prototype and pre-production DC/DC converters are subjected to
progressively higher stress levels induced by thermal cycling, rate of temperature change, vibration, power cycling, product-specific stresses (such as dc
voltage variation) and combined environments. The stresses are not meant
to simulate field 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 strengthened as appropriate. Applied stresses are continually stepped up until products
For each new product, electrical performance is verified via a comprehensive
characterization process and long-term reliability is confirmed via a rigorous
qualification procedure. The qual procedure includes such strenuous tests as
thermal shock and 500 hour life. Qual testing is summarized below.
QUALIFICATION TESTING
Qualification Test
HALT
High Temperature Storage
Thermal Shock
Temperature/Humidity
Lead Integrity
Life Test
Marking Permanency
End Point Electrical Tests
Method/Comments
Murata Power Solutions in-house procedure
Max. rated temp., 1,000 hours
10 cycles, –55 to +125°C
+85°C, 85% humidity, 48 hours
Murata Power Solutions in-house procedure
+70°C, 500 hours*
Murata Power Solutions in-house procedure
Per product specification
Typical HALT Profile
100
40
80
20
40
20
0
0
Random Vibration (G's)
Temperature (°C)
60
–20
–40
10
20
30
40
50
60
70
80
90
Test Time (minutes)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, 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/
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. Specifications are subject to change without
notice.
© 2015 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_TWR8-11W.D03 Page 5 of 5