akunec said:I'm building a 2 channel bridged amp covering 30-350hz with a Lambda TD12s. My power supply will be a similar design to Linkwitz's. Would it benefit to snubberize it, as I hear that snubberizing helps out the higher frequencies alot more and maybe not the bass?
Vil said:interesting . I am working on similar 3 way active speaker design with 2 bridged LM3886 for bass 20-380hz , one LM3875 for mid 380hz-3.8khz and one LM3875 for tweeter over 3.8khz .just thinking what value of power cap can be optimal in every band ? sure I'll go snubbed .
neutron7 said:i doubt a snubber would make much difference, but theres no harm in trying it. LOTS of capacitance for that one!
The snubber as described on DIYAUDIO is really a bypass capacitor or RC combination (a snubber is an RC combo, or DRC combo which clamps the ringing in a diode or transistor circuit, or to dissipate the stored energy in an inductor -- like a relay, transformer or motor) --
so here's the point -- it really doesn't matter the end frequency for your amplifier -- if high frequency noise gets makes its way from the supply rails onto the input of your amplifier the "least bad" outcome is a little power dissipation, the worst "bad outcome" is an amplifer which becomes unstable or goes into oscillation.
jackinnj said:The term "snubber" as used by On-Semi, International Rectifier, Maxim, Texas Instruments most typically refers to an RC network, or RCD network used to clamp the ringing occasioned by the parallel capacitance a diode/inductance network.
While you don't abstract yourself from the snubber applied to diodes, you are way off what I'm talking about for months.
A snubber can even be used after a regulator, with proper values and impressive results.
It has NOTHING to do with what you have in mind, it has nothing to do with the pdfs with calculations that you posted, it's a completely different story.
It has nothing to do with diodes or trafos.
I call a snubber to an RC element to ground, as TI calls it too.
But they didn't get to the PSU yet.
From the OPA549 datasheet, page 12: