2. analog
  3. 161238-117192

Is there anyone out there who has expert knowledge of upc1237 ?


Can the upc1237 be driven by 50 volts AC (which is rectified to 70 VDC as Vcc).

According to the datasheet formulas, for the above voltages, R ac should be 32k ohms and R vcc should be 19k ohms.  Since pin 8 has a shunt regulator, in theory, it should work.  But before I connect such voltages and blow up the chip, I wanted to be absolutely sure.

Has anyone ACTUALLY ever used those high voltage values ?

I already have this available on the power supply and did not want to get another transformer and rectify it.

Thanks
128x128cakyol

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cakyol OP
940 posts
 
Thanks,

You are right.  It is probably much safer to go with maybe an external 24 volt transformer giving about rectified 35 VDC.  This way, I can keep the capacitors at lower voltages (hence a bit cheaper) anyway.

Thanks

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