LM4752 application question.

Hi Bogey,

Unfortunately, there aren't any application notes or guides for the LM4752. This is a fairly simple power op amp where standard layout rules would apply. Are there specific concerns or questions that we might be able to help with?

I don't see a one-chip I2S input 100W solution, but this is not my area of responsibility. It looks like there could be a two-chip solution using one of the digital processors like the TAS5086 with one of the Purepath parts like the TAS5612A in BTL mode.

Maybe D2 or one of his guys have other suggestions.

Best Regards,

JD

Hi, Bogey,

I like JD's suggestion of TAS5086 driving TAS5612A. You can then do the summing and LPFing for the sub in the TAS5086 digitally, and have zero analog circuitry!!!

You will need to use an MSP430 to boot up the TAS5086 and load the filter coefficients into it. Unfortunately, we don't have any self-booting I2S-input devices; they all require the use of a micro like the MSP430.

-d2

Dear Sir

May you have suggestion HEAT SINKING model for stereo 10W? (or you may suggest you ever use)

                                                  Best regards,

                                                            Bogey

Hi Sir

Many thanks for your reply~~

                                Best regards,

                                              Bogey

Hi Sir

Good days,

From datasheet page 19 point out "clip-on heatsinks". may you have suggest vender? due to customer and me have no this kind heatsink.

may you pls advise?

                                         Best regards,

                                                          Bogey

Hi Bogey,

If you want to use the LM4752 in the TO-220 package, I'd like to suggest that you look at the LM4755. The LM4752 is presently not available in the TO-220 package, but the LM4755 is. The parts are essentially the same, except the LM4755 has a mute pin.

Any heatsink manufacturer should have an appropriate heatsink for the device depending upon the thermal resistance needs created by your design. The link below is one manufacturer:

http://www.aavid.com/product-group/standard?taxonomy_vocabulary_2_tid=10

One more selection option below: You can use the parametric table to get to the right thermal resistance for your design.

http://www.digikey.com/scripts/dksearch/dksus.dll?FV=fff40012%2Cfff80068&k=heatsinks&vendor=0&mnonly=0&newproducts=0&ptm=0&fid=0&quantity=0&PV357=2&PV623=4&PV623=22&PV623=20&PV623=13&PV623=19

Best Regards,

JD

Dear JD

Good days,

Sorry for i check website, LM4755 seems also DDPAK package. and can't be apply sample.

may we can suggest other part.......

                                            Best regards,

                                                         Bogey

Hi Bogey,

Thanks for bringing this to our attention. I'll check into this issue and the availability and get back to you as soon as possible.

Best Regards,

JD

Hi JD

Good days,

May we check with you if TI have LM4753 having symbol(.olb file) that can be opened by Capture10.5??

                                                            Best regards,

                                                                                 Bogey

Hi, Bogey,

I don't think you mean LM4753, do you? It's obsolete...

I checked the LM4752, and it has a link to the wrong footprint. I will check to see if I can get that fixed.

-d2

Hi JD

Good days,

Many thanks for your reply and sorry for i key wrong part number,

Yes, I need is LM4752.

customer have a little urgent, if possible, pls hep us check LM4752 (having symbol(.olb file).

                                                           Besr regards,

                                                                         Bogey

Hi JD

Good days,

MAy we check if here have good news?

                                          Best regards,

                                                           Bogey