is LM1875 replacement for TDA2030(A)

[drmr_bg]

first, i want to excuse for my english, 'cause i don't use it very much🙂

i have amplifier circuit schematic which uses TDA2030 as a driver stage for a pair of power transistors (BD249/250)
cause TDA2030 has worse PSRR than LM1875, and they otherwise look alike, i think to use National's chip

anybody can see a problem with that?

P.S. currently i can't give the schematic, but if you need it i'll find a way to scan it.

 

[mcolliva]

Originally posted by drmr_bg [/i]
first, i want to excuse for my english, 'cause i don't use it very much🙂

i have amplifier circuit schematic which uses TDA2030 as a driver stage for a pair of power transistors (BD249/250)
cause TDA2030 has worse PSRR than LM1875, and they otherwise look alike, i think to use National's chip

anybody can see a problem with that?

Hello!
I think that there is no problem!
Values of resistors in feedback are same as LM1875..
I replace power board of an old Cambridge Amp and LM1875 sound really good...
Have a nice day..

MArco

 

[palesha]

Yes,
It is better by all parameters. Even sound better & more output.
Mahendra Palesha

 

[livenicely]

i have tda2030a in my 2.1 channel computer speakers. Can i change tha tda2030a with lm1875 or it can cause problem

 

[formula 22]

Hello!
If you can schematic amplifier with tda2030 and an BD249/BD250.
thank you

 

[suntechnik]

Not exactly BD but LM1875+2SA1943/2SC5200 instead
DIY Audio Power Amplifier LM1875 bridge 2SA1943 2SC5200 100 Watt with Circuit Diagram and PCB Layout | Technology News and Review

I can highly recommend using LM instead of TDA, US ICs are the best.

 

[geraldfryjr]

That is a very interesting circuit!!

jer 🙂

 

[geraldfryjr]

I wonder how it would work with 2 pair of output devices or even 4 pair or more. 🙂

jer 🙂

 

[johnr66]

Not exactly BD but LM1875+2SA1943/2SC5200 instead
DIY Audio Power Amplifier LM1875 bridge 2SA1943 2SC5200 100 Watt with Circuit Diagram and PCB Layout | Technology News and Review

I can highly recommend using LM instead of TDA, US ICs are the best.

100 watts into 8 ohms with 25 volt rails. That just ain't going to happen.

 

[suntechnik]

I wonder how it would work with 2 pair of output devices or even 4 pair or more. 🙂

jer 🙂

You might better search other schematics in that case
LME49810 ThermalTrak

Another project (LME49811 is a half of LM4702) with lateral FETs:

LM4702 with 2SK1058 2SJ162 MOSFET Hi-Fi Amplifier 300 Watt Circuit and PCB Layout | Electronic Home Entertainment


LME49830 designed to drive multiply MOSFETS.

 

[suntechnik]

100 watts into 8 ohms with 25 volt rails. That just ain't going to happen.

That was just a link to a possible approach using LM1875 with extra output transistors. LME498.. are specially designed for the purpose.