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Bill10/11/2019
Your rating of Vcc up to 25v or 40v is wrong.
When running at Vcc = 15v, I experienced a short circuit across the supply in first case and in second case, a bang and a flash of light when a component blew up !
These devices have a 10 volt capacitor across the supply voltage - any attempt to run above 10v will blow this component. This happened twice before I realised the source of the problem. I have replaced the surface mount 10v 47uf capacitor with a 25v 47uf radial capacitor.
Once modified they seem to operate well.
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