A Series
1 5 - 2 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
C&D has invested in a Qualmark OVS-ꢀ 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 (–±± to +ꢀ2±°C, 35°C/minute) and simultaneous, gradually increas-
ing, random longitudinal and rotational vibration up to 25G’s with load cycling
and applied-voltage extremes added as desired. Many devices in C&D’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.
In-Line Process Controls and Screening
A combination of statistical sampling and ꢀ55ꢁ 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 ꢀ55ꢁ 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
Qualification
C&D 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.
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 ±55 hour life. Qual testing is summarized below.
Typical HALT Profile
ꢀ55
85
65
45
25
5
45
25
5
–25
–45
ꢀ5
25
35
45
±5
65
75
85
95
Test Time (minutes)
Qualification Testing
Method/Comments
Qualification Test
HALT
C&D in-house procedure
High Temperature Storage
Thermal Shock
Max. rated temp., ꢀ,555 hours
ꢀ5 cycles, –±± to +ꢀ2±°C
+8±°C, 8±ꢁ humidity, 48 hours
C&D in-house procedure
+75°C, ±55 hours*
Temperature/Humidity
Lead Integrity
Life Test
Marking Permanency
End Point Electrical Tests
C&D in-house procedure
Per product specification
* Interim electrical test at 255 hours.
USA:
Canada: Toronto, Tel: (866) 740 1232, email: toronto@cdtechno.com
UK: Milton Keynes, Tel: +44 (0)1908 615232, email: mk@cdtechno.com
Tucson (Az), Tel: (800) 547 2537, email: sales@cdtechno.com
®
France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@cdtechno.com
Germany: München, Tel: +49 (0)89-544334-0, email: ped.munich@cdtechno.com
C&D Technologies, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Japan:
Tokyo, Tel: 3-3779-1031, email: sales_tokyo@cdtechno.com
Osaka, Tel: 6-6354-2025, email: sales_osaka@cdtechno.com
Website: www.cd4power.jp
www.cd4power.com
email: sales@cdtechno.com
China:
Shanghai, Tel: +86 215 027 3678, email: shanghai@cdtechno.com
Guangzhou, Tel: +86 208 221 8066, email: guangzhou@cdtechno.com
ISO 9001 REGISTERED
© 2007 C&D Technologies, Inc.
DS-0323A
05/14/07
C&D Technologies, 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.
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