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www.us- tech.com


September, 2019 New Modular Power Supplies from TDK


National City, CA — TDK Corporation has intro- duced the TDK-Lambda QM4 modular power sup- plies rated at 550 to 650W. This further extends the QM series which can provide up to 1,500W output power. The QM4 models are available with up to 10 outputs, have full MoPPs isolation and low acoustic noise. With medical and industrial safety certifica- tions, the power supplies are suitable for use in med- ical, test and measurement, communications, and broadcast equipment. Accepting a wide range of 90 to 264 VAC, 47 to


63 Hz input (440 Hz with reduced PFC), the QM4 can deliver 550W at low line and 650W with a high line 180 to 264 VAC input. With its modular construction, the series can be configured using a simple online configurator to provide 1 to 10 independently regulat- ed outputs and include individual output good signal and remote on/off functions.


The QM series module output voltages range


from 2.8 to 105.6V and have output power levels from 300 to 1,200W. A further subset of option modules provides an AC fail signal, standby voltages (up to


12V, 2A), global remote on/off and PMBus™ commu- nications. Overall case dimensions for the QM4 are 4.3 x 2.5 x 10.6 in. (108 x 63.3 x 270 mm). The QM4 will operate in ambient temperatures


of –4 to +158°F (–20 to +70°C) and –40°F (–40°C) start-up — with output power and output current linearly derating above 122°F (50°C) to 50 percent at 158°F (70°C). With efficiencies of up to 91 percent, less internal heat is generated, allowing the use of a low-speed cooling fan to reduce audible noise. A lower airflow speed also significantly reduces the ingress of dirt and other contaminants, improving product reliability. All models in the QM series have


a seven-year warranty as standard. Contact: TDK-Lambda Americas, Inc., 401


QM4 series modular power supply.


Mile of Cars Way, Suite 325, National City, CA 91950 % 619-575-4400 E-mail: tom.tillman@us.tdk-lambda.com Web: www.tdk-lambda.com


See at The Battery Show, Booth 2330


TECHNICA, U.S.A. Fulfilling Manufacturing Needs Throughout the Electronics Industry


ZYMET: Reworkable Edgebond and Edgefill Adhesives


East Hanover, NJ — ZYMET is now offering reworkable edgebond and edgefill adhesives, designed to increase board-level reliability of large WLPs for harsh environment applications. The company is pre- senting research findings alongside Portland State University at SMTA International 2019. WLPs, which include WLCSPs


and FO-WLPs, offer a path to lower weight, smaller form factor and high- er performance. However, their low coefficients of thermal expansion are not well matched to those of common- ly used organic substrates. This mis- match results in early solder joint fatigue and early failures in thermal cycle tests, tests that are more and more difficult to pass as the package gets larger or as conditions become more harsh. This limitation constricts the


•Fast setup & changeover •Simple operation


•Stable & reliable print process •Fine pitch printing capability •Excellent print definition


•Powerful off-Line programming •User friendly interface •Exceptional pickup reliability •100% ball & lead inspection •Optimal performance & accuracy


xcellent choice for High Mix, Medium Volume Production


user to either small package sizes or to limiting the use of such packages to less severe environments. ZYMET’s investigation shows that reworkable adhesives can enhance board-level reliability of large WLPs, even for harsh environments. Thermal cycle testing from –40


to +257°F (–40 to +125°C) was per- formed on a 0.47 in. (12 mm) WLCSP that was assembled with SAC solder on a rigid PCB. Non-bonded assem- blies were compared with those bonded with a reworkable edgebond adhesive, applied in both dot-edge- bond and full-edgebond configura- tions, and with a reworkable edgefill adhesive. The expected poor perform- ance of the non-bonded package is confirmed. All three bonded configu- rations significantly improved per- formance, raising characteristic life by 300 to 1,000 percent, depending


on the configuration. Contact: ZYMET, Inc., 7 Great


Available in the United States exclusively through Technica U.S.A.


1-800-909-8697 www.technica.com


Meadow Lane, East Hanover, NJ 07936 % 973-428-5245 E-mail: info@zymet.com Web: www.zymet.com


See at SMTAI, Booth 941


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