hi sir,
We use DCR010505 parts for generating an isolated 5V supply. We’re getting some field failures around these parts, the failure mode usually appears as no output ，we've had 7 failure samples since last year.
one sample appears 6.6V output （it is the same as "DCR010505: damaged DC-DC converters"，which I have got at e2e forum），but that sample ultimately has no output voltage。
some samples are very hot. All the failure samples have abnormal output resistance ，I measured the output resistance between +VOUT and -VOUT with a multimeter ，value is only about 100Ω，but the good chip is about 100KΩ. I guess the internal LDO has a short circuit.
The chip is used at an Interface Circuit for a dry contact status detection， We use a cable to connect the dry contact and the PCBA board .I measured the noise on the cable，and also on the DCR's output。now the wave is as follows:
CH1: the noise on line
CH2: the noise on DCR's output
the noise amplitude on the DCR'is large and seems keep sync as the line noise。
I want to ask if this noise will cause damage to the chip？ I checked the datasheet and found no relevant instructions.
my email is anbin.cui@united-imaging.com, we can also talk about off line.
please help me and thank you very much!
