33202 max current spec is 80 mA so a spike 10x this value, however short, is probably pushing things a bit. If I can replicate the fault with the toggle-test on Q521 then I think we can close the file on this one.
Thanks
R.
TVS diode on the (-) input and Vin line?
I don't think that would do to much,the input cant go more then 2 or
300mV above or below Vcc. A dual schottkey one cathode to Vcc the other cathode to ground with current limiting resistor at the (-) input with a small capacitor between the output and the negative input would help protect against exceeding the CM input range.
Well, how about this one then?
The ESD rating of the connector doesn't matter. If the + contact mates first and more than 15V develop on the supply rail versus ground that would be the end of the opamp. If you could get a clamp in there that would be great. But increasing the bypass cap by a factor of ten already makes it so much harder for a body charge to ratchet up the voltage.
That's rated at 60V. By that voltage the opamp will have long gone *phut*.
Not really. More than 6V reverse Vbe often sends them to lalaland. And when VCC abs max gets exceeded by a lot then both types will die. Some with a nice big meltdown followed by a puff of smoke and a crater.
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
And no crowbar in there? Tsk .. tsk .. tsk ;-)
The designers of that switcher should be dunked into a moat a few times. That's what they did in Europe a few hundred years ago when bakers made the rolls too small and were caught. In front of the whole town.
Wow. They must have had too much money at their hands. But crates can indeed be ghastly. One of my designs lives in a Schroff crate. Very pretty but the innards are all anodized. An EMI nightmare. Luckily I have a big industrial Dremel that can peel that layer off in seconds. Very noisy process though.
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
Noisy like what? Please entertain us ;-)
-- Thanks, Fred.
Well, I have a Bosch and it sounds like a circular saw at a major construction site :-)
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
Well, I don't have a Dremel at hand, but in the shop that my office opens onto, they use air-powered die grinders.
It's only a little lower-pitched than a dentist's drill, and usually so loud that I have to use earplugs.
IOW, noisy like a dentist's drill, when you're the one in the chair. =:-O
Hope This Helps! Rich
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.