Power Supply Failures

The Lambda KPSA10-15 is a self-contained, offline power supply capable of supply 15Volts DC at 1 Ampere from a universal input of 120VAC ~ 240VAC, 50/60Hz. It is designed for PCB mounting as a module and is passively cooled. Several of these power supplies failed in the field in 2-2.5 years. There was no sign of damage or environmental contamination on the PCB. All arrived DOA. The component selection was mediocre except for the electrolytic capacitors, which were chosen wisely.

Gideon Analytical Laboratories received three PTE43-31-C-RA power supplies, two were failed and the other was a working device for comparison. Power supplies are devices that supply electrical power to an electrical load. Some power supplies convert alternating current (AC) to direct current (DC) for use in a variety of electronics. Typically, a computer needs a power supply that will convert 120 Volt AC power oscillating at 60 Hertz (Hz). Power supplies are vital to most electronic endeavors, like electrical components in machines, process automation, or for power generation. OnePTE43-31-C-RA power supply had a problem with the 5 volt (V) output line; it was going below the toleration limit of the processor and shutting down. Gideon Analytical Laboratories was determined to find the reason for this failure.

Gideon Analytical Laboratories performed failure analysis on several Bias BPS2-07001 failed power supplies. Several good units were submitted for comparison. These Bias BPS2-07001 are linear and switching power supplies 2W 14V, 5V DUAL 85-265V Std Temp and are ROHS compliant. They provide up to one-half, one, or two watts of output power (BPS0.5, BPS1, and BPS2) at 8 or 14 VDC (Vo) and an optional 3.3 or 5 VDC (Vr) output to power standby functions such as clocks, microprocessors, remote control sensors, and more.