theboom
Member level 2
[revised]
[just noticed my title is redundant, but i can't edit it
In my application, voltage tolerance between capacitors is critical. This concerns manufacturing tolerances of voltage linearity and drop:
[just noticed my title is redundant, but i can't edit it
In my application, voltage tolerance between capacitors is critical. This concerns manufacturing tolerances of voltage linearity and drop:
- Vdrop tolerance compensation ideas:
- Increase capacitance to reduce voltage drop. Vdrop = Q ÷ C, where Q is charge in coulombs, C is capacitance in farads. Thus, variation in Vdrop is determined capacitor tolerance rating. You can halve Vdrop by doubling capacitance.
- Trim Vdrop of an active diode during board assembly.
- Linearity tolerance compensation ideas:
- How to determine the manufacturing tolerance of linearity? I'm guessing this may be related to variation in ESR with changes in voltage and temperature.
- Parallel the caps to improve linearity. This technique may suffer diminishing returns.
- Do nothing. Linearity tolerance between film caps is better than 0.5% consistent. Is this true?
- Other methods?
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