bluelaser
Member level 1
Hi,all:
I make an audio production powered by DC-DC circuit. the specication of dc-dc is : input:8vDC---12VDC ,output:13.5VDC. the max current is 1A.
the chip is Max1771.
now I meet the problem:
a)when the speaker use the same ground with this unit. I can hear the noise. the frequency of noise is the same as the frequency of DC-DC.
b)when the unit boot up, I can hear the noise come from the motor of hard
disk .
Do you think whether it is suitable to use dc-dc power in the audio productio. or these problems are caused by the wrong pcb layout?
I hope your help !!!
Thank you!
bluelaser
I make an audio production powered by DC-DC circuit. the specication of dc-dc is : input:8vDC---12VDC ,output:13.5VDC. the max current is 1A.
the chip is Max1771.
now I meet the problem:
a)when the speaker use the same ground with this unit. I can hear the noise. the frequency of noise is the same as the frequency of DC-DC.
b)when the unit boot up, I can hear the noise come from the motor of hard
disk .
Do you think whether it is suitable to use dc-dc power in the audio productio. or these problems are caused by the wrong pcb layout?
I hope your help !!!
Thank you!
bluelaser