Tool/software:
Dear Expert
10A input current sampling high normal 0.488-0.723 actual: 0.755: After maintenance analysis, it was found that U5 (LM2904DR) was faulty, and it was replaced and OK. What is the reason for the 2% failure rate?
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Tool/software:
Dear Expert
10A input current sampling high normal 0.488-0.723 actual: 0.755: After maintenance analysis, it was found that U5 (LM2904DR) was faulty, and it was replaced and OK. What is the reason for the 2% failure rate?
Gabriel,
Is the difference 0.775V vs 0.723V; that is 52mV. The loop gain is 16. So that equates to 52/16 = 3.25mV which is within the normal Vos range in the data sheet.