Power amplifier apex ba1200 pcb layout pdf the power produced can reach 1500w. The lm1875 is a wide power amplifier with very low distortion and highquality efficiency for audio applications. Pada akhirnya, setiap amplifier yang dibuat dengan lm3875, lm 3876, lm3886, bahkan lm1875 disebut dengan gainclone. This term is going to be new to a lot of you, but to a diehard group of internetters, this is the holy grail of amplifiers. Gainclone or chipamp is a type of audio amplifier made by doityourselfers, or individuals. This article shows an alternative design using the tda2050 by st. How does the sound of the gainclone compare to xxxx amplifier. Jan 23, 2020 the lm1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. Lm1875 20w audio power amplifier july 2002 lm1875 20w audio power amplifier general description the lm1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.
Lm1875 is preferable for headphone duties due to their lower power output and dcoffset level. Nov 06, 2014 i recently built a dualmono lm3886 chipamp gainclone amplifier from a kit sold by the nowdefunct. This is gainclone amplifier circuit, project as stereo 40w56 watt main amplifer use lm3875. A community dedicated to helping everyone learn the art of audio. This great chip, is a little larger than the size of a thumbnail and can deliver up to 56w rms continuous with 100w peaks and it can do this at 0. The official datasheet pdf claims the ability to drive 20w into 8.
Gainx lm1875 220watt gainclone amplifier diy amplifier. Lm1875 chipamp full project electronic circuit collection. The original solid state gaincard amplifiers were designed by a man named junji kimura you could say that koji teramura had a hand in the design as well, having some very nicely tuned ears to lend to the project. Please be extremely careful when dealing with power supply voltages. It gives power is 20 watts into a 4 ohms or 8 ohms load on 25v power supplies. The lm1875 is a monolithic power amplifier offering. Lm3875 overture audio power amp series hperformance. Next time, ill dive right into the crown prince of the ab chip amps the lm3886 itself. Texas instruments lm1875 series audio amplifiers mouser.
Feb 03, 2016 this lm1875 based has been build in 2015 by me. Gainclone or chipamp is a type of audio amplifier made by doityourselfers, or individuals interested in diy audio. Dual 20w audio power amplifier with mute and standby modes check for samples. Lm3875 gainclone lm3875 gainclone gainclone is a single integrated circuit based on an operational amplifier op amp on a single substrate of silicon. Device overload protection consists of both internal current limit and thermal shutdown. Some people could make it less than 32 mm on the signal path. Merancang dan merakit nano gainclone lm1875 amplifier ala. Texas instruments lm1875 series audio amplifiers are available at mouser electronics. Mar 04, 2016 this lm1875 based has been build in 2016. Diy amplifiers that are made of one single amplifier ic.
This is a stereo power amplifier gainclone lm1875, a lot of people are interested in this gainclone power amplifier, one of my own. A complete guide to design and build a hifi lm3886 amplifier. Like all the other, simple lm3886 or lm3875 gainclones ive. As you already very well know, gainclone is a commonly used name for clones of so called gaincard amplifier, i. See here to view schematic and download the pcb gerber file. Snas524a may 2004 revised may 2004 lm1875 20w audio power amplifier check for samples. It easy to build by 2 ics,more a few parts,without any set. Building an lm3886 gainclone chip amp with a regulated. Gainclone adalah cloning dari amplifier gaincard, suatu amplifier komersial produksi 47labs yang harganya mencapai ribuan dollar. Merakit gainclone tujuan utama nya tentunya untuk mendapatkan amplifier flat sesuai dengan suara asli nya. The performance of the lm3875, utilizing its self peak instantaneous temperature. And this amplifier is very suitable for bass amplifiers or for the use of subwoofer speakers. Yuanjing dual lm3886 gainclone amplifier board with 6n11.
The lm1875 delivers 20 watts into a 4x or 8x load on g25v supplies. The lm1875 not only limits current to around 4a, but also reduces the value of the limit current when an output transistor has a high voltage across it. Hifi amplifier audiophile alpine audio audio box audio equipment gain multimedia theater bluetooth. It is in a 5pin package and usage is very simple two. To begin, this was originally going to be the amp for the speakers in my other thread, but i have decided to go ahead and build a new set of 3 way monitors to replace those. I decided against the partial kit that includes the lm3886 ic, rectifiers, capacitors and resistors because i already all had pretty much all the required components on hand.
Not all users have contributed to its continued and almost irreversible derision as a modern communication tool. But i dont have any intention to match or compete with them. In this article, i discuss the history of the gainclone and how i built my chipamp. In this tutorial, ill walk you through the amplifier design process as i build a 25 watt stereo amplifier with the tda2050. Lm3875 gainclone amplifier gainclone amplifiers have very few components and this one is based on the national semiconductor lm3875 ic. I gave them to my girlfriend, and will still building an amp for them, bu. The tda2050 is a great sounding chip amplifier with lots of power. Diyers have created similar builds using a variety of power opamp or audio opamp chips including national semiconductor lm1875, lm3875, lm3886. Specifications 20w audio amplifier kit is based on lm1875 ic. Gainclone ver 2 lm3875t with regulated power supply. Lm1875 20w audio power amplifier general description the lm1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. Hi all, i have an lm3875 gainclone with very standard components and a pair of 160va 25v toroids. A complete guide to design and build a hifi lm3886. Power supply 48 vdc output 20 w, 4 very low distortion thd 0.
We have been secretly watching the movement from the shadows for the past few years and finally decided we had had. However, as always, methods of improving the design have come along to provide an almost bewildering number of options for the new builder. The project files for my mini gain clone with the lm1875 ic as described here. Lm1875 datasheet, lm1875 pdf, lm1875 data sheet, datasheet, data sheet, pdf. This is for how to make one version of a gainclone amplifier.
There are also many who modify this power amplifier to be more powerful and also pleasant to hear and demand among various audiophile circles. Highperformance 56w audio power amplifier general description the lm3875 is a highperformance audio power amplifier capable of delivering 56w of continuous average power to an 8. The download file includes both the amplifier board and the matching psuboard. After a couple of people have burned some expensive speakers, they come to realize that the network is for the dead and the speakers sound much worse than. Parallel gainclone power amplifier lm3886 electronic circuit. Aug 22, 2017 gainx lm1875 220watt gainclone amplifier. Lm1875 datasheet, lm1875 datasheets, lm1875 pdf, lm1875 circuit. Lm1875 1features description the lm1875 is a monolithic power amplifier offering 2 up to 30 watts output power very low distortion and high quality performance for avo typically 90 db consumer audio applications. The pcbs and components are very simple and quick to make, only took about 20 mins to assemble both amps and rectifier board. Aug 03, 2018 posts about gainclone written by theslowdiyer. I built this audio amplifier using a dualmono lm1875 chip configuration. Lm1876 1features description the lm1876 is a stereo audio amplifier capable of 23 spike protection delivering typically 20w per channel of continuous minimal amount of external components average output power into a 4. Lm3886 chip amp gainclone amplifier construction project. And this circuit is complete power supply and preamplifier circuit but not include 5.
My first finished audio construction project was this 25w per channel stereo amplifier. Building an lm3886 gainclone chip amp with a regulated power. Lm3875 gainclone amplifier circuit stereo 56w eleccircuit. Electronic kit module available using this component. The gainclone is probably the most commonly built and wellknown amplifier project amongst hobbyists. Untuk ic tl084 maksimal 18 volt, diatas itu mati mas.
In this project use, the single voltage supply is positive and ground. I have already done a couple of gainclone type chipamp designs with the lm3875 amplifier ic, mainly here and here. I teach my students that its all about how you abuse. I found out after i placed a dac on top of this gc, some hf noise is present on the speaker output when the dac is on. If you have some diy skills and are willing to give the gainclone kits a try, you can get them at sites such as, or even ebay search for gainclone or lm1875. A sound where precision meets no, demands elegance. The gain degree of amplification of the chips is dependent upon the ratio r nfb r 3. The gobo stereo audio amplifier kit is based around the lm1875 ic.
The utc lm1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. First, ill show you how to calculate the voltage and current requirements of your power. Gainclone amplifier gc lm3886 stereo idr sold out amplifier lm1875 2. Be the first to know about our newest products, specials and promotions. Modifikasi lainnya adalah pada kapasitor penguatan umpan balik yang pada datasheet 22uf diganti nonpolar 2x 22uf yang disambung saling berhadapan kutubkutubnya untuk menghasilakan audio yang lebih natural. Lm3886 gainclone amplifier chip amp circuit diagram another frequent change was the elimination of zobel network with the output of the lm3886 amplifier, because it sounded bad. Briangt lm3886 chipamp aka gainclone amplifier diy audio. The voltage of the power supply will have an effect on the power of the ic. I built it so my daughter could practice her roland stage piano at bedroom volume levels.
Each rail positive and negative will have 30 pcs of black gate capacitor, with total around 20. Now there is a new one, this time based on the smaller lm1875 ic the smaller ic obviously means less voltage and less power compared to the lm3875 and lm3886 but unless you have a big room andor very inefficient speakers or you are having a party, the 20w or. Its based on the national semiconductors lm1875 chip. This gc circuit works fine as long as you dont get high frequency interference. Briangt lm3886 chipamp aka gainclone amplifier given that i mostly enjoy building tube amps that could have been built in the 1960s, this is a huge departure. Ya silahkan di modif modif sendiri, berarti yang masih kurang beres di bagian surroundnya. Some of people on the net says that gainclone is one of the shortest amplifier in the world.
Jan 30, 2009 you know we love tubes and all things analog, but there is another trend in diy sound amplification that has been hard to ignore. And it is also suitable for controlling speaker subwoofer let alone combined with power amplifier circuit using ic lm1875, is perfect for your home theater audio usage. Having heard a pair of frugel horn mk3s with the new mark audio chp70s driven by a pair of 300bs, which i cant afford to make i am going to make a pair of speakers myself. Jun 18, 2014 briangt lm3886 chipamp aka gainclone amplifier given that i mostly enjoy building tube amps that could have been built in the 1960s, this is a huge departure. If we decrease the impedance it doesnt have to be a resistor. Yuanjing dual lm3886 gainclone amplifier board with 6n11 tube preamplifier 68 watts x 2 hybrid amplifiers offer the warmth of yesteryear combined with the accuracy and efficiency associated with a modern solidstate amplifier. Its a solid state amplifier for tube lovers who want to retain the tonal colour of their 2a3 or similar but also yearn for a tighter, more disciplined sound. Also called gainclone amplifier, which is very similar to the performance with amplifier tubes. This is a question that i often get asked through the web site. Nsc 20w audio power amplifier,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors.
The lm1875 design takes advantage of advanced circuit techniques and. Gobo stereo audio amplifier kit lm1875, 15w, classab. Jan 21, 2020 this is gainclone amplifier circuit, project as stereo 40w56 watt main amplifer use lm3875. Snas091c may 1999 revised march 20 lm3886 overture audio power amplifier series highperformance68w audio power amplifier wmute. I have been comparing the schematic i have for the chinese kits with the chipamp kit, the lm1875. For my gainclone build i purchased the circuit boards for a noninverted lm3886 amplifier and power supply from. Lm1875 pdf, lm1875 description, lm1875 datasheets, lm1875. For detailed information about the circuit and the lm1875 chip specifications and performance see the texas instruments lm1875 audio power amplifier datasheet pdf 3. How to design and build an amplifier with the tda2050.
Merancang dan merakit nano gainclone lm1875 amplifier ala diyaudioku pcb layout nano gainclone ala diyaudioku. Cara mudah menyolder komponen smd tanpa blower hot air gun. I recently built a dualmono lm3886 chipamp gainclone amplifier from a kit sold by the nowdefunct. The lm3886 is one of texas instruments singlechip monolithic amplifier integrated circuits. The lm1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. Based on the above schematic, some basic modifications can easily be done. Powerpoint presentations dont have to revert to ugly, overanimated stereotype. It would prolly be a good idea to give a little paraphrased and abbreviated background on gainclone amps to get us started.
It also works nicely as power amp for portable cdmp3 players, computer multimedia, etc. Lm1875 20w audio power amplifier march 1995 lm1875 20w audio power amplifier general description the lm1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. The lm1875 is a monolithic power amplifier offering very low distortion and high quality. The audio sector gainclone offers a sound redolent of the beauty of open heart surgery. As ive promised before, my gainclone project will be supplied with special smoothing capacitors. Amplifier gaincard ini menggunakan integrated circuit lm3875 produksi national. So i built this gainclone lm3886 chip amp and i learn a lot from doing it. The gainclone has, not unsurprisingly, due to its simplicity and low cost, become a huge phenomenon in the world of diy hifi. Lm1876 overture audio power amplifier series dual 20w. Gainclone faq frequently asked questions guide to building.
My guess is that the noise comes from the dacs digital circut, and got coupled into the amp. Page 3 telecaster guitar forum printable guitar template pdf. When driving nonlinear reactive loads such as motors or loudspeakers with builtinprotection relays, there is a. The circuit generally follows the standard application note for the lm1875. Lm1876 1features description the lm1876 is a stereo audio amplifier capable of 23 spike protection delivering typically 20w per channel of continuous. Lm1876 overture audio power amplifier series dual 20w audio power amplifier with mute and standby modes check for samples. The only time i would be worried about the temperature with a gainclone, is when using the regulated power supply that appears to make the chips run at a higher temperature. It is a design based on highpower integrated circuits, particularly the national semiconductor overture series. Oct 23, 2017 this is a stereo power amplifier gainclone lm1875, a lot of people are interested in this gainclone power amplifier, one of my own. Wijkamp schematics parts list l r l r power r11 r21 1k. In this article, i discuss the history of the gainclone.
Stereo gainclone power amplifier lm1875 electronic circuit. Schematic and pcb layout export your schematic into a thirdparty layout tool. Stereo noninverting gainclone, lm3886 based c 2010 version. They can use with dc power supply wide range between 16 volts to 60 volts and can use both dual and single voltage.
330 1433 404 829 422 648 1056 1209 178 519 1581 143 363 338 942 933 481 1636 502 937 131 1124 1458 163 1208 815 1446 1086 257 1223 317 1393 31 1194 779 1005 1223 414 1121 255 239 1023