This part, an 8 pin bridgable 1W audio amplifier with volume control input is going obsolete and last order date is end of this year. When I designed it in around 10 years ago they were old then but plenty available. We will eventually need to design in a replacement. We are running these at around 9V VCC and they work great into a small speaker. 8 Ohms I believe. We also use the volume control input... +40 dB gain down to -60 or 80 dB gain. Doesn't require that much gain necessarily. There is the old National/TI LM386-4 that I just now heard is going obsolete ! Dang. It looked like it was going to work. Could go discreet with op-amp and SOT-23s but still wouldn't have the volume/gain control pin without adding a Jfet or something and would take up valuable space on one of the existing products. Any suggestions ? Thanks, boB K7IQ http://www.nxp.com/documents/data_sheet/TDA7052A_AT.pdf 1 W BTL mono audio amplifier with DC volume control TDA7052A/AT
Looking for a replacement for NXP/Philips TDA7052A/AT NXP 1W audio amp going obsolete...
Started by ●October 27, 2016
Reply by ●October 27, 20162016-10-27
On 27/10/2016 22:22, boB wrote:> > > > This part, an 8 pin bridgable 1W audio amplifier with volume control > input is going obsolete and last order date is end of this year. > > When I designed it in around 10 years ago they were old then but > plenty available. We will eventually need to design in a replacement. > > We are running these at around 9V VCC and they work great into a small > speaker. 8 Ohms I believe. > > We also use the volume control input... +40 dB gain down to -60 or 80 > dB gain. Doesn't require that much gain necessarily. > > There is the old National/TI LM386-4 that I just now heard is going > obsolete ! Dang. It looked like it was going to work. > > Could go discreet with op-amp and SOT-23s but still wouldn't have the > volume/gain control pin without adding a Jfet or something and would > take up valuable space on one of the existing products. > > Any suggestions ? > > Thanks, > boB > K7IQ > > > http://www.nxp.com/documents/data_sheet/TDA7052A_AT.pdf > > 1 W BTL mono audio amplifier with DC volume control TDA7052A/AT >I had the same problem.... switched to the SOIC8 version . You can just about solder across the dil pads as an interim solution. I guess I'll be looking for a solution too. Maybe I'll have to bulk buy. :( --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Reply by ●October 27, 20162016-10-27
On Fri, 28 Oct 2016 00:00:01 +0100, TTman <pcw1.cad@ntlworld.com> wrote:>On 27/10/2016 22:22, boB wrote: >> >> >> >> This part, an 8 pin bridgable 1W audio amplifier with volume control >> input is going obsolete and last order date is end of this year. >> >> When I designed it in around 10 years ago they were old then but >> plenty available. We will eventually need to design in a replacement. >> >> We are running these at around 9V VCC and they work great into a small >> speaker. 8 Ohms I believe. >> >> We also use the volume control input... +40 dB gain down to -60 or 80 >> dB gain. Doesn't require that much gain necessarily. >> >> There is the old National/TI LM386-4 that I just now heard is going >> obsolete ! Dang. It looked like it was going to work. >> >> Could go discreet with op-amp and SOT-23s but still wouldn't have the >> volume/gain control pin without adding a Jfet or something and would >> take up valuable space on one of the existing products. >> >> Any suggestions ? >> >> Thanks, >> boB >> K7IQ >> >> >> http://www.nxp.com/documents/data_sheet/TDA7052A_AT.pdf >> >> 1 W BTL mono audio amplifier with DC volume control TDA7052A/AT >> >I had the same problem.... switched to the SOIC8 version . You can just >about solder across the dil pads as an interim solution. I guess I'll be >looking for a solution too. Maybe I'll have to bulk buy. :( > >--- >This email has been checked for viruses by Avast antivirus software. >https://www.avast.com/antivirusThanks TT... We are going to have to do a bulk buy as well. End of 2016 is it. There are quite a few at distrubuters and I think we have almost 10,000 now but will need to substitute something. They were the perfect parts and cheap... 32 cents each. I was ready to design in the LM386-4 which has a gain control but NOW they're life is going to be short lived as well. There's gotta be some asian part I would think ? TV sets and all that. Might all be Class D. Actually I found a Class D chip but no volume/gain control. Would have to add at least that J-FET to the circuit which isn't the end of the world BUT it takes up space. Will stay tuned. boB
Reply by ●October 27, 20162016-10-27
On Thu, 27 Oct 2016 16:28:26 -0700, boB <boB@theresnoplacelikehome.com> wrote:>On Fri, 28 Oct 2016 00:00:01 +0100, TTman <pcw1.cad@ntlworld.com> >wrote: > >>On 27/10/2016 22:22, boB wrote: >>> >>> >>> >>> This part, an 8 pin bridgable 1W audio amplifier with volume control >>> input is going obsolete and last order date is end of this year. >>> >>> When I designed it in around 10 years ago they were old then but >>> plenty available. We will eventually need to design in a replacement. >>> >>> We are running these at around 9V VCC and they work great into a small >>> speaker. 8 Ohms I believe. >>> >>> We also use the volume control input... +40 dB gain down to -60 or 80 >>> dB gain. Doesn't require that much gain necessarily. >>> >>> There is the old National/TI LM386-4 that I just now heard is going >>> obsolete ! Dang. It looked like it was going to work. >>> >>> Could go discreet with op-amp and SOT-23s but still wouldn't have the >>> volume/gain control pin without adding a Jfet or something and would >>> take up valuable space on one of the existing products. >>> >>> Any suggestions ? >>> >>> Thanks, >>> boB >>> K7IQ >>> >>> >>> http://www.nxp.com/documents/data_sheet/TDA7052A_AT.pdf >>> >>> 1 W BTL mono audio amplifier with DC volume control TDA7052A/AT >>> >>I had the same problem.... switched to the SOIC8 version . You can just >>about solder across the dil pads as an interim solution. I guess I'll be >>looking for a solution too. Maybe I'll have to bulk buy. :( >> >>--- >>This email has been checked for viruses by Avast antivirus software. >>https://www.avast.com/antivirus > > >Thanks TT... >We are going to have to do a bulk buy as well. End of 2016 is it. >There are quite a few at distrubuters and I think we have almost >10,000 now but will need to substitute something. They were the >perfect parts and cheap... 32 cents each. I was ready to design in >the LM386-4 which has a gain control but NOW they're life is going to >be short lived as well. > >There's gotta be some asian part I would think ? TV sets and all >that. Might all be Class D. Actually I found a Class D chip but no >volume/gain control. Would have to add at least that J-FET to the >circuit which isn't the end of the world BUT it takes up space. > >Will stay tuned.How about something like: <http://www.digikey.com/product-detail/en/aries-electronics/LCQT-SOIC8-8/A880AR-ND/4754588> They're expensive but something like this shouldn't be too difficult to make.
Reply by ●October 28, 20162016-10-28
On Thu, 27 Oct 2016 19:40:34 -0400, krw <krw@nowhere.com> wrote:>On Thu, 27 Oct 2016 16:28:26 -0700, boB ><boB@theresnoplacelikehome.com> wrote: > >>On Fri, 28 Oct 2016 00:00:01 +0100, TTman <pcw1.cad@ntlworld.com> >>wrote: >> >>>On 27/10/2016 22:22, boB wrote: >>>> >>>> >>>> >>>> This part, an 8 pin bridgable 1W audio amplifier with volume control >>>> input is going obsolete and last order date is end of this year. >>>> >>>> When I designed it in around 10 years ago they were old then but >>>> plenty available. We will eventually need to design in a replacement. >>>> >>>> We are running these at around 9V VCC and they work great into a small >>>> speaker. 8 Ohms I believe. >>>> >>>> We also use the volume control input... +40 dB gain down to -60 or 80 >>>> dB gain. Doesn't require that much gain necessarily. >>>> >>>> There is the old National/TI LM386-4 that I just now heard is going >>>> obsolete ! Dang. It looked like it was going to work. >>>> >>>> Could go discreet with op-amp and SOT-23s but still wouldn't have the >>>> volume/gain control pin without adding a Jfet or something and would >>>> take up valuable space on one of the existing products. >>>> >>>> Any suggestions ? >>>> >>>> Thanks, >>>> boB >>>> K7IQ >>>> >>>> >>>> http://www.nxp.com/documents/data_sheet/TDA7052A_AT.pdf >>>> >>>> 1 W BTL mono audio amplifier with DC volume control TDA7052A/AT >>>> >>>I had the same problem.... switched to the SOIC8 version . You can just >>>about solder across the dil pads as an interim solution. I guess I'll be >>>looking for a solution too. Maybe I'll have to bulk buy. :( >>> >>>--- >>>This email has been checked for viruses by Avast antivirus software. >>>https://www.avast.com/antivirus >> >> >>Thanks TT... >>We are going to have to do a bulk buy as well. End of 2016 is it. >>There are quite a few at distrubuters and I think we have almost >>10,000 now but will need to substitute something. They were the >>perfect parts and cheap... 32 cents each. I was ready to design in >>the LM386-4 which has a gain control but NOW they're life is going to >>be short lived as well. >> >>There's gotta be some asian part I would think ? TV sets and all >>that. Might all be Class D. Actually I found a Class D chip but no >>volume/gain control. Would have to add at least that J-FET to the >>circuit which isn't the end of the world BUT it takes up space. >> >>Will stay tuned. > >How about something like: ><http://www.digikey.com/product-detail/en/aries-electronics/LCQT-SOIC8-8/A880AR-ND/4754588> > >They're expensive but something like this shouldn't be too difficult >to make.I did something similar in the 1980s to replace a Valley People VCA with a THAT Corp. VCA when the VP became obsolete. Something like this did cross my mind for a second though. Too large and not the best for production. I will tack on another part to test though. It ~may~ actually be (hopefully) that the LM386-4 (the 1 watt part) isn't going away... That is what I had heard though through the grapevine and the internet which is always true of course. Nothing official actually so there is a ray of hope, maybe. boB
Reply by ●October 28, 20162016-10-28
boB <boB@theresnoplacelikehome.com> wrote:> It ~may~ actually be (hopefully) that the LM386-4 (the 1 watt > part) isn't going away... That is what I had heard though through the > grapevine and the internet which is always true of course. Nothing > official actually so there is a ray of hope, maybe.One would think that components like the LM386 would never go away... The are the basic building blocks of simple electronic devices, like the 555.
Reply by ●October 28, 20162016-10-28
On Thursday, October 27, 2016 at 7:28:28 PM UTC-4, boB wrote:> On Fri, 28 Oct 2016 00:00:01 +0100, TTman <pcw1.cad@ntlworld.com> > wrote: > > >On 27/10/2016 22:22, boB wrote: > >> > >> > >> > >> This part, an 8 pin bridgable 1W audio amplifier with volume control > >> input is going obsolete and last order date is end of this year. > >> > >> When I designed it in around 10 years ago they were old then but > >> plenty available. We will eventually need to design in a replacement. > >> > >> We are running these at around 9V VCC and they work great into a small > >> speaker. 8 Ohms I believe. > >> > >> We also use the volume control input... +40 dB gain down to -60 or 80 > >> dB gain. Doesn't require that much gain necessarily. > >> > >> There is the old National/TI LM386-4 that I just now heard is going > >> obsolete ! Dang. It looked like it was going to work. > >> > >> Could go discreet with op-amp and SOT-23s but still wouldn't have the > >> volume/gain control pin without adding a Jfet or something and would > >> take up valuable space on one of the existing products. > >> > >> Any suggestions ? > >> > >> Thanks, > >> boB > >> K7IQ > >> > >> > >> http://www.nxp.com/documents/data_sheet/TDA7052A_AT.pdf > >> > >> 1 W BTL mono audio amplifier with DC volume control TDA7052A/AT > >> > >I had the same problem.... switched to the SOIC8 version . You can just > >about solder across the dil pads as an interim solution. I guess I'll be > >looking for a solution too. Maybe I'll have to bulk buy. :( > > > >--- > >This email has been checked for viruses by Avast antivirus software. > >https://www.avast.com/antivirus > > > Thanks TT... > We are going to have to do a bulk buy as well. End of 2016 is it. > There are quite a few at distrubuters and I think we have almost > 10,000 now but will need to substitute something. They were the > perfect parts and cheap... 32 cents each. I was ready to design in > the LM386-4 which has a gain control but NOW they're life is going to > be short lived as well.Well a life time buy is what we would do. $0.32 is pretty cheap. There is the TCA0372 it's a dual opamp.. if that would work... you've probably already thought about it. George H.> > There's gotta be some asian part I would think ? TV sets and all > that. Might all be Class D. Actually I found a Class D chip but no > volume/gain control. Would have to add at least that J-FET to the > circuit which isn't the end of the world BUT it takes up space. > > Will stay tuned. > boB
Reply by ●October 28, 20162016-10-28
> > Thanks TT... > We are going to have to do a bulk buy as well. End of 2016 is it. > There are quite a few at distrubuters and I think we have almost > 10,000 now but will need to substitute something. They were the > perfect parts and cheap... 32 cents each. I was ready to design in > the LM386-4 which has a gain control but NOW they're life is going to > be short lived as well. > > There's gotta be some asian part I would think ? TV sets and all > that. Might all be Class D. Actually I found a Class D chip but no > volume/gain control. Would have to add at least that J-FET to the > circuit which isn't the end of the world BUT it takes up space. > > Will stay tuned. > boB >TI do a part that's good to go class D, but Vcc is 5.2V max :( I'd have to put in another 5V reg as our TDA runs off a 2 cell lipo --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Reply by ●October 29, 20162016-10-29
On Friday, 28 October 2016 12:31:41 UTC+1, Rob wrote:> boB <boB@theresnoplacelikehome.com> wrote:> > It ~may~ actually be (hopefully) that the LM386-4 (the 1 watt > > part) isn't going away... That is what I had heard though through the > > grapevine and the internet which is always true of course. Nothing > > official actually so there is a ray of hope, maybe. > > One would think that components like the LM386 would never go away...+1, they are used so widely, they're the go-to rock bottom audio amp chip. I don't see it making business sense to stop production. Only use it if you want crappy sound. NT
Reply by ●October 29, 20162016-10-29
On Sat, 29 Oct 2016 10:08:09 -0700 (PDT), tabbypurr@gmail.com wrote:>On Friday, 28 October 2016 12:31:41 UTC+1, Rob wrote: >> boB <boB@theresnoplacelikehome.com> wrote: > >> > It ~may~ actually be (hopefully) that the LM386-4 (the 1 watt >> > part) isn't going away... That is what I had heard though through the >> > grapevine and the internet which is always true of course. Nothing >> > official actually so there is a ray of hope, maybe. >> >> One would think that components like the LM386 would never go away... > >+1, they are used so widely, they're the go-to rock bottom audio amp chip. I don't see it making business sense to stop production. Only use it if you want crappy sound. > > >NTLuckily this 1W amplifier is only used for voice and a small speaker. A couple percent THD won't harm anything. Might even help to sound "louder" ? boB
