Hi, i am designing a pair of active Studio Speakers.
Bi-amped, and controlled by an ADAU1701 DSP.
The DSP is already working.
Also both amplifier, i just have to choose whitch i use.
(i made a self oscillating with LM393 and IRF9540/540 pair, or an UCD like the Phillips UM10155)
So i need a smps which provides ca. +/-35V, 5V for the DSP and Protection circuit, and maybe 12V for the Mosfets in the amplifier.
I already tried a circuit with TL494, but the problem was, that the feedback of the SMP was on the +/-35V.
So when the amp was in idle the 5V for the DSP dropped. to <3V.
But when i draw more current from the main Voltage, the voltage before the LM7805 gets to high.
How can i solve this?
Make a regulation with minimum PWM?
Or generate the 5V with a Buck converter from the 35V.
Or try an unregulated SMPS?
I hope what i wrote is understandable... -)
Greetings David
Bi-amped, and controlled by an ADAU1701 DSP.
The DSP is already working.
Also both amplifier, i just have to choose whitch i use.
(i made a self oscillating with LM393 and IRF9540/540 pair, or an UCD like the Phillips UM10155)
So i need a smps which provides ca. +/-35V, 5V for the DSP and Protection circuit, and maybe 12V for the Mosfets in the amplifier.
I already tried a circuit with TL494, but the problem was, that the feedback of the SMP was on the +/-35V.
So when the amp was in idle the 5V for the DSP dropped. to <3V.
But when i draw more current from the main Voltage, the voltage before the LM7805 gets to high.
How can i solve this?
Make a regulation with minimum PWM?
Or generate the 5V with a Buck converter from the 35V.
Or try an unregulated SMPS?
I hope what i wrote is understandable... -)
Greetings David
