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General => General Technical Chat => Topic started by: ElectronicFanatic1 on February 21, 2012, 04:34:52 am

Title: Can anyone help me with this Datasheet PDF? -Current readings-
Post by: ElectronicFanatic1 on February 21, 2012, 04:34:52 am

So I came across this data sheet for a LM1876 22W audio amp.. and I cant seem to find the 'Supply Current' ratings. It's probably just slipping by me... but can able one help and point it out please?

Thanks!

Mitch

http://www.jameco.com/Jameco/Products/ProdDS/835761.pdf (http://www.jameco.com/Jameco/Products/ProdDS/835761.pdf)

Title: Re: Can anyone help me with this Datasheet PDF? -Current readings-
Post by: allanw on February 21, 2012, 04:42:04 am

Need the max supply current or something? You could figure it out from the power dissipation vs output power graphs, which have different curves for VS = +/- 15, 18, 20. Otherwise it's not explicitly stated.

Title: Re: Can anyone help me with this Datasheet PDF? -Current readings-
Post by: Pentium100 on February 21, 2012, 04:50:11 am

In page 18 (page 19 on the pdf reader) there is an equation how to calculate the required power supply current and voltage.

Iopeak = Sqrt(2Po/Rl), where  Po is the output power and Rl is the load resistance.

Title: Re: Can anyone help me with this Datasheet PDF? -Current readings-
Post by: ElectronicFanatic1 on February 21, 2012, 04:51:04 am

Thank you!