Should the current handling ability of a power supply choke be based on the peak current of the amplifier stages or the quiescent current of the amp stages in a single ended amp?
It must handle the maximum current that can and will be drawn through it.
It is best to actually oversize such an item.
It is best to actually oversize such an item.
No simple answer to this question. A choke that partially saturates at increased DC current (a swinging choke) may improve voltage regulation of power supply.
> the peak current of the amplifier stages or the quiescent current of the amp stages in a single ended amp?
In a single-ended Audio amp, with a capacitor on the end of the power supply, peak and average are about the same.
In a single-ended Audio amp, with a capacitor on the end of the power supply, peak and average are about the same.
Note that if you are selecting a choke with a certain current rating, then check that your power supply operates the choke with the same ballpark VAC across the choke as is used by the manufacturer to rate the inductance of the choke. For example, your power supply may have 10Vrms ripple on the first filter capacitor, and after the choke the ripple may be close to 0Vrms, so the choke is operating with 10Vrms across it.
Lemme see if I have this right. The choke carries 150ma and has a DCR of 104 ohm. My full wave rectified 275v ac transformer feeds a clc... filter.
I should expect about 1.414 x 275v = 389v at the first C. Psud says I get 350v at the second C. The voltage drop from DCR thru the choke is 2.3v. is the rest (37.7v) the ac ripple that the choke filters?
I should expect about 1.414 x 275v = 389v at the first C. Psud says I get 350v at the second C. The voltage drop from DCR thru the choke is 2.3v. is the rest (37.7v) the ac ripple that the choke filters?
In PSUD2, the second filter cap shows negligible ripple voltage (the Diff column of data), and the first filter cap would show about 10.5Vpp of ripple, indicating the inductor has an rms ripple voltage across it of circa 4V (its a spiky waveform so can't do a simple conversion).
The DC voltage drop across the choke is 15.5V = 0.15 x 104. The PSUD2 results for the choke show that DC drop as the Mean voltage difference between C1 and C2 voltages.
The PSUD2 results for the choke voltage show DC+AC levels (which take a bit more effort to interpret correctly).
The DC voltage drop across the choke is 15.5V = 0.15 x 104. The PSUD2 results for the choke show that DC drop as the Mean voltage difference between C1 and C2 voltages.
The PSUD2 results for the choke voltage show DC+AC levels (which take a bit more effort to interpret correctly).
All single ended amps are class A, which have tiny variations in DC current draw. Are we misunderstanding your question?
YOS,
Chris