All Questions
Tagged with electrolytic-capacitor power-supply
21
questions
1
vote
2
answers
92
views
Decoupling capacitors for operational amplifiers
when in the refence design of an amplifier (for example OPA856) we see the + sign in a capacitor schematic, does this necessarily means we should use electrolytic capacitors?
If there is no positive ...
- 473
3
votes
3
answers
290
views
Should I measure ripple current on a replacement capacitor of lowered ESR?
I've changed an 820 μF capacitor on the output of a 1.05 V linear regulator which feeds the PCH (Intel's Platform Controller Hub), or "southbridge", on a PC motherboard. It's working fine ...
- 265
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
217
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
672
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
1
answer
57
views
Interpolation of electrolytic capacitor's dissipation factor / loss angle
It is a common practice for capacitor manufactures to define either the ESR or the dissipation factor (aka loss angle) at a given frequency (e.g. 120Hz, 1kHz or 1MHz). It is also clear that their ...
- 3,589
2
votes
1
answer
162
views
What happens when a Cap fails?
I am trying to understand What happens when the Electrolytic caps fail at the input terminal of a charger? What about at the output of the bridge rectifier?
These two caps below are rated 100uF @ 200V....
- 337
1
vote
0
answers
162
views
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
3k
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
57
views
Is it safe to plug the connection end of a capacitor?
I need to put a capacitor between my motor power supply and ground cables, and have covered the connection with resin for safety. Is it safe to do this?
It's an aluminium electrolytic capacitor by ...
- 253
1
vote
1
answer
768
views
Tube power supply capacitors replacement
I'm building the following power supply (credits to Audio design guide):
I would like to replace C5, C8 and C9 with 1000uF capacitors (with the same voltage rate). From my understanding these ...
- 561
1
vote
3
answers
820
views
Adding capacitors prevents car peltier cooler from making low battery light flicker, but why?
I have a Black and Decker Heater/Cooler that I want to use in my Camper as a little drink caddy for in front of my Futon while I have company over and we are playing games, and I just switched to a ...
- 19
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