Jun 27, 2018 · In particular with power op-amps, such as LM3886, the PCB layout or point-to-point wiring routes make a significant difference in the circuit performance. Judging by the chatter on the DIY Audio Chip Amps Forum, the main challenges for designers appear to be stability, bypassing, grounding, layout, and thermal design.

Feb 28, 2019 · In the past weeks I've been working on an audio amplifier using the LM3886 and LME49720 in a composite, bridged topology. I started off with TINA-TI simulations of the basic circuit until I got it stable with a decent phase and gain margins, step response and all and then I moved on to the actual schematic and PCB.

Jan 15, 2022 · Hello, I'm new to uCap12 (and simulation in general) and I'm trying to import and simulate a PSpice (.lib) model file which I downloaded directly from TI. I have copied to .lib file to the main LIBRARY folder and then used "Add Part Wizard" tool to import the model, I selected the 6 pin op-amp model and renamed the pins as they appear in the model file (.SUBCKT lm3886 …

Jun 17, 2016 · I know this is basic stuff, but I never underestimate my ability to make an arse of things. I'm building a 25W guitar amp, the preamp / tone stack / soft clipper is from Rod Elliot's design with minor tweaks. I'm using a LM3886 as the output stage, with +/- 24ish supplies from a 18-0-18 80VA toroidal transformer. I'm also using some current feedback to raise the output …

Aug 5, 2021 · The small measurable differences there are always (except once) place the LA90 discrete (newer version) ahead of the original. What's marginally better in the discrete? Power handling: ~1dB Power vs distortion 20Hz, 500Hz, 1k, 5k: 5dB Power vs distortion 10k, 20kHz: 10-15dB What's marginally better in the LM3886 (that's what they used, right?)

Nov 28, 2024 · EEVblog Electronics Community Forum » Electronics » Projects, Designs, and Technical Stuff » Super easy composite amplifier utilizing LM3886/76!

LM3886 Class AB "gainclone" chip-amps - DIY , kit and assembled since 1999...

May 14, 2021 · Yes, the inputs to the LM3886 are very high impedance -- basically no current enters them. Adding Rin actually decreases the input impedance of the system as a whole. The resistance to ground is Rin in parallel with a really, really large resistance which is basically Rin. If you post the schematic of the amplifier I'm sure we can determine the input impedance of the …

Jun 22, 2015 · EEVblog Electronics Community Forum » Electronics » Projects, Designs, and Technical Stuff » LM3886 Library for Eagle?

Apr 16, 2020 · I have a DynAudio active speaker with a simple internal amp pcb consisting of wired two LM3886s in bridge that feeds the main speaker & a third single LM3886 for tweeter. The fault is random. Powering on randomly results in full on motor-boating oscillation for the main driver speaker. It’s extremely high volume and has seriously given a few folks a fright more …