All Questions
9
questions
0
votes
1
answer
86
views
Verifying my capacitor calculation
I just received in the mail a 0-60 V power supply that has the capability of outputting 24 A. I needed a high-voltage, high-current power supply to help design and test high-powered LED arrays for ...
0
votes
1
answer
220
views
ESR of aluminum electrolytic capacitors [closed]
Is there any way to calculate the ESR of electrolytic capacitors for high frequencies?
In aluminum electrolytic capacitor datasheets, the dissipation factor is given with low frequency(100Hz-120Hz) ...
- 319
1
vote
0
answers
197
views
Discolored negative lead on electrolytic capacitors
Would the discoloration around the negative lead of these capacitors be a sign of failure? If so, why would the negative lead darken instead of the positive - or both leads.
They are Maron EFM 35 ...
- 71
0
votes
1
answer
147
views
Precise capacitor in parallel to power supply
I found this schematic in ADNS-2610 datasheet.
There are two capacitors in parallel between pins 6 and 7 (GND and VDD.) One is 4.7 uF and the another is 0.1 uF, so the parallel result is 4.8 uF.
Why ...
- 135
0
votes
3
answers
677
views
Switched power supply capacitors
Lots of electronic hardware gets problems its psu and more specificly: with the electrolytic capacitors.
How do old capacitors usually affect the capacitance of that electrolytic capacitor?
What ...
- 874
1
vote
0
answers
164
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1V Overshoot and Undershoot on Power Rails of LTE Module
I have designed a PCB (four layer) having SIM7600I LTE Module. The Stackup is:
Signal & Component Layer with Ground Pour
Internal Ground Power Plane
Internal ...
- 962
1
vote
3
answers
4k
views
Capacitor max safe operating voltage
I'm currently making a power supply with a 32 volt AC out, so the rectified voltage would be 32*1.414-diode drop. The value comes around 44 volts. My question is, is it okay to hook up a 50 V rated ...
1
vote
1
answer
135
views
Current calculation in Capacitor drop supply?
In the above two circuits the only difference is post rectification zener and pre rectification zener arrangement is used.
According to my understanding
in both the cases i=240/Xc1+R1=15 ma
and ...
- 31
2
votes
3
answers
5k
views
Diagnosing cause of electrolytic capacitor failing
I am hoping somebody could help me diagnose the cause of failing electrolytic capacitors in a circuit. The context is a charger circuit, more specifically its power supply unit:
Given a diode bridge ...
- 5,219