Low ESR capacitors in Linear Power Supply
Hi , I intend to use low ESR capacitors in a classical linear power supply project ( with a large transformer ) , instead of general purpose capacitors , it is advantage?
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Re: Low ESR capacitors in Linear Power Supply
welcome to the bcn forums
honestly im not sure but i dont think thered be much of a difference.
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Re: Low ESR capacitors in Linear Power Supply
not much advantage other than general quality.
you may need to add a low value resistor between the rectifier & caps to limit inrush if you use a lot.
what you really want for linear is caps with high rippleComment
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Re: Low ESR capacitors in Linear Power Supply
I have a few linear supplies of various sizes with Nichi HE and Panny FM after the rectifier that are several years old, no problems.
I wouldn't worry about inrush protection beyond what the transformer normally needs as long as you pick sane filter cap values.Comment
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Re: Low ESR capacitors in Linear Power Supply
Filters in Linear supplies don't have to deal with Ripple created by the Switchers in an SMPS but, even still, Low ESR caps will give better filtering than GP caps will.
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Cost is probably about the same so use the good stuff.
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There is one situation where they would be significantly better than GP.
If you have [or maybe even your neighbor has] a crappy SMPS in use with no input side filter it can be sending noise back into your power lines which will get to the input of your linear supply.
- Ever see a cheap PC or VCR or similar cause a radio to buzz [static] when they are both on and no where near close to each other? That's what is going on. No input filter in the device's SMPS so switching noise is feeding back into the power lines.
.Mann-Made Global Warming.
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
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This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board
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Dear members,
I have a linear variable power supply with unknown brand name that I used for voltage injection.
Then it failed. I discovered that its transistors (Q1 and Q2) are shorted.
In addition, I discovered that its zener diodes are defective.
I can replace the burned transistors.
But I do not know the model of the zener diodes. the model number is not marked on the zener diodes.
Therefore, I cannot replace the zener diodes.
I do not want to test the zener diodes in a test circuit to discover their model or value.
no schematics are available... -
I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem...
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