I have a question regarding the use of caps in a power supply:
I understand that caps are used in the power supply for both filtering and smoothing AC to DC. However, do the caps have to be connected from the rail to ground, or can they just be connected to both rails?
See attachment for schematics.
Thanks in advance!
Reece
I understand that caps are used in the power supply for both filtering and smoothing AC to DC. However, do the caps have to be connected from the rail to ground, or can they just be connected to both rails?
See attachment for schematics.
Thanks in advance!
Reece
Attachments
Tensop said:if you connect rail to rail you will need a capacitor with twice the voltage rating
Beyond that, it would work? To get similar results, would I also need double the capacitance?
Reece
No it will not work very good. The caps are filters, reservoirs and stabilizers to make the supply as stiff as possible. With the caps "floating" in respect to system ground the rails will start to fluctuate and it will affect signal and propably something will be destroyed.
ingvar ahlberg said:No it will not work very good. The caps are filters, reservoirs and stabilizers to make the supply as stiff as possible. With the caps "floating" in respect to system ground the rails will start to fluctuate and it will affect signal and propably something will be destroyed.
Got it. Thanks!
rjon17469 said:do the caps have to be connected from the rail to ground
Normally the ground IS the joint between the main res caps. Coupled to the centre tap of the Tx. of course.
In Dual Rail applications anyway.
Idea ..........
See:
cap discussion
Good to know someone has some same idea like me.........
Not tried it yet though, would like to know if this realy works..........
See:
cap discussion
http://www.passlabs.com/np/MPA_PS_D0.pdf
Good to know someone has some same idea like me.........
Not tried it yet though, would like to know if this realy works..........
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