BWR-15/275-D5A-C Murata Power Solutions Inc, BWR-15/275-D5A-C Datasheet - Page 5

• Manufacturer Part Number: BWR-15/275-D5A-C
• Description: CONV DC/DC +/-15V +/-275MA DIP
• Manufacturer: Murata Power Solutions Inc
• Series: BWRr
• Type: Isolatedr

Specifications of BWR-15/275-D5A-C

• Number Of Outputs: 2
• Output: ±15V
• Power (watts): 8W
• Mounting Type: Through Hole
• Voltage - Input: 4.7 ~ 7.25V
• Package / Case: 5-DIP Module
• 1st Output: 15 VDC @ 275mA
• 2nd Output: -15 VDC @ 275mA
• Size / Dimension: 2.00" L x 1.00" W x 0.38" H (50.8mm x 25.4mm x 9.7mm)
• Power (watts) - Rated: 8W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 79%
• Approvals: cUL, UL
• Output Power: 4 W
• Input Voltage Range: 4.7 V to 7.25 V
• Input Voltage (nominal): 5 V
• Output Voltage (channel 1): +/- 15 V
• Output Current (channel 1): +/- 275 mA
• Output Voltage (channel 2): 15 V
• Output Current (channel 2): +/- 275 mA
• Isolation Voltage: 1.5 KV
• Product: Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 4th Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 811-1722-5

Quality and Reliability
The A-Series are the first DC/DC Converters to emerge from MPS’s 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.
Design for Reliability
Design for Reliability is woven throughout our multi-phased, new-product-
development 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 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 MPS 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 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 eventually fail. After corrective actions and/or design
100
–20
–40
80
60
40
20
0
10
20
30
Typical HALT Profile
40
Test Time (minutes)
50
60
www.murata-ps.com
70
80
90
40
20
0
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 fine 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 final-electrical tested prior to external
visual examination, packing and shipping.
Rapid Response to Problems
MPS employs an outstanding corrective-action system to immediately
address any detected shortcomings in either products or processes. When-
ever our assembly, quality or engineering personnel spot a product/process
problem, 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 refine our assembly operation to
yield one of the lowest product defect rates in the industry.
changes, stresses are stepped up again and the cycle is repeated until the
"fundamental limit of the technology" is determined.
MPS 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 increas-
ing, random longitudinal and rotational vibration up to 20G’s with load cycling
and applied-voltage extremes added as desired. Many devices in MPS’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.
Qualification
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.
* Interim electrical test at 200 hours.
Qualification Test
HALT
High Temperature Storage
Thermal Shock
Temperature/Humidity
Lead Integrity
Life Test
Marking Permanency
End Point Electrical Tests
7 - 1 0 W , D u a l O u t p u t D C / D C C o n v e r t e r s
Technical enquiries email: [e-mail], tel:
Qualification Testing
Method/Comments
MPS in-house procedure
Max. rated temp., 1,000 hours
10 cycles, –55 to +125°C
+85°C, 85% humidity, 48 hours
MPS in-house procedure
+70°C, 500 hours*
MPS in-house procedure
Per product specification
BWR Models
MDC_BWR7_10_B01 Page 5 of 6
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