Arcade Collecting > Pinball

High Voltage not high enough

<< < (5/5)

GPE:

--- Quote from: pinballjim on April 11, 2009, 12:29:12 am ---Isn't he the guy that bought a Pinball Lizard board, copied it exactly, and ran off cheap copies after hours at his job? 

That's the story I heard and I've seen the products side by side and it sure sounded convincing.

--- End quote ---

I don't know - I've never seen a PBLiz board of this type.  But I wouldn't doubt it if the design was copied.

I do know the board mentioned above uses the Texas Instruments TL783 as the regulator.  This part has an absolute maximum Vin to Vout differential of 100 volts.  This one has a differential of about 230 volts - more than 2x.  Some will argue that the differential is actually about 60 volts (Vin of 230 minus Vout of 170).  BUT Texas Instruments warns (in several places) that Vout MUST account for two conditions: 1 - shorted output, 2 - turnon conditions when briefly Vin = 230 and Vout = 0.  I showed this design to one of the Texas Instruments linear FAE's -- they laughed and just said 'good luck'.

Ed

Navigation

[0] Message Index

[*] Previous page