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Old 16th February 2012, 09:47 AM   #1
authlxl is offline authlxl  China
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Default multichannel amp using irs2092 boot sync question

we found some type of multichannel amp using 2092, can these products realize two or more channel boot sync? if can not boot at same time when power on, we can hear one channel sound and the other delay.
any friends have good solution of this?
we have to design external osc fixed frequency class D in our 2way or 3way active module.
we have test 2092 evm board, boot different time,and EMI value not good as fixed frequency type.

Last edited by authlxl; 17th February 2012 at 09:53 AM.
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Old 16th February 2012, 11:42 PM   #2
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The 2092 starts up if all the voltages are correct around it.

To make them start together you could add a small circuit to apply a reset signal to both amps for a couple of seconds until both are in the right state for power up.
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Old 17th February 2012, 09:44 AM   #3
authlxl is offline authlxl  China
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irs 2902 sd pin pull down when power on , then shift it,i don't know it is good choice or not, because self osc start at different time.
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