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Old 24th January 2004, 06:20 AM   #1
JDeV is offline JDeV  South Africa
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Default Bridge/parallel calculations??

Can somebody please post formula for calculating the max. out power (at various supply voltage levels) of a bridge/parallel combination using LM4780 (for instance)? I plan to use this with either Dayton Titanic or Adire DPL 12 for active subwoofer - if there is enough power

Thanx for any help.
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Old 24th January 2004, 07:50 AM   #2
Rob M is offline Rob M  United States
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Take a look at the "design guides" here:

http://www.national.com/appinfo/audio/
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Old 24th January 2004, 08:27 AM   #3
JDeV is offline JDeV  South Africa
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Quote:
Originally posted by Rob M
Take a look at the "design guides" here:

http://www.national.com/appinfo/audio/

I looked at that earlier, they don't support the LM4780 and I am not sure what the combined (bridged/parallel) result must be.
In the BPA-200 application sheet , http://www.national.com/appinfo/audi...ation_Note.pdf , they also explain how to calulate the bridged Pmax, but not bridg/paral.
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Old 24th January 2004, 09:09 AM   #4
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Check these especially the Excel file
http://www.national.com/an/AN/AN-1192.pdf
http://www.national.com/appinfo/audi...gn_Guide13.xls
http://www.national.com/appinfo/audi...sign_Guide.pdf
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Old 24th January 2004, 09:27 AM   #5
JDeV is offline JDeV  South Africa
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AN-1192 and PAB-200 are basically the same document, 1st one is just a later version. The design guides is the same as what Rob M suggested.
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Old 24th January 2004, 09:31 AM   #6
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I recommend that you take a look at the Excel calculations.
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