Class D 200 Wrms with 2 mosfet cheap

[norazmi]

hi michelle,

i can see that, its small amp but the power is more than picture u post . For the hi power class D amp yes, i have it IR2110 + TL074 its scale able for its power approx 800w - 1.2 kw . the mosfet and gate resistor is important and others too like ultrafast diode, you want try to build hi-power one? if so... prepared for the hi current and protection. did u have any dc protection? if you dont, i have it with discrete part and 12vdc supply, using relay it will protect your speaker from dc output. we will start new thread for the hi power one, btw the board still small and can be bridge output to deliver more power and really need good coupling caps 1uf power supply. the quality is more than this one and more power. The original one is UCD using LM311 comparator and IR2110, but im still prefer no-ucd style using TL074 and IR2110

if u want it let me know so we can start new thread for the hi power one.

regards,
Azmi

 

[norazmi]

btw michelle,

do you have EI or Small EE core (ferrite) or ferrite toroid core? if u have it, so u can make it LC filter too or the best t106-2 iron powder, i hope u know different between ferrite material and iron material ok. because with right material and filter the output u will have very low distortion because class D have high efficiency. if u face any problem at high freq or low freq let me know, we may do something with LC filter for the best thd.

If im not mistaken, the core u have with u know taken from pc power supply? if yes so its iron powder core t106-26. the gapped area need to be cover with something ( tape or etc.) to minimize EMI.

regards,
Azmi

 

[michelle]

CLASS D high power

Hi Norazmi
greetings yes core is from computer power supply now i am looking for ferrite cores sad part
these red core not available here please start high power d class amp thread let every one benifit
if you post schematic and pcb i will make it i have ic IR2110 AND IR2092 just have look on diyaudio
d class IR2092 by luka i have its pcb and i think you have seen pcb on foros de electronica sit please post your schematic ill make it
warm regards
michelle

 

[norazmi]

will start new thread, prepared the list of sch, pcb and picture to post

 

[irvynejay]

core

could this core will be fine and what # of magnet wire to use and how many turns,does this core need to sawed for air gap

 

[norazmi]

Hi irvy, yes this core is -02 material, its really suiteable for class D. Please measure Outer diameter and Inner diameter, so i can tell you how many turn it will need. and this core NO NEED air gap.

 

[irvynejay]

thanx norazmi my core inner is 14mm outer is 27 mm

 

[norazmi]

i think its t106-2, the original dimension in inches, is outer diameter is 1.060 and inner diameter is 0.780, height is 0.437 inch.

i would like to suggest u do 40 turns, estimated inductance will be 22uh and use awg18 and length of wire estimated 1.520 yard so make it 1.6 yard. filter caps at output with 1uf cap at least 63 vdc, if the cap have higher voltage is better.

p/s - while first time you power on this amp, do not connect any speaker at output, and as usual measure output with gnd should be couple of mv dc, if u get more than 1vdc at output than your amp have something wrong place component or problem with inductor is not t106-2, or if the core getting hot faster so its not t106-2, because t106-2 will remain cool even u play at high volume. If the core getting hot faster than it will need to change to other and u can find core such as EE33 ferrite or other toroid ferrite core, and i`ll help u for calculate the core.

 

[irvynejay]

Thank you for your advice well do what you told,,one more thing i have 16-Lead SOIC SMD
IR2110S,is this possible to use on UCD amp and i also have 14-Lead PDIP
IR2113,is this possible to use or replace the Ir2110???

 

[norazmi]

yes u can use it, both ir2110S and IR2113 is higher voltage than IR2110. If you finish the 200W amp please post it here.

 

[irvynejay]

Pcb

thanx yes i will post some picture and here is my pcb

 

[norazmi]

Kool!, what a nice board irvy, trace is clear and clean. What mosfet type do you plan to put on UCD? Reminder if u plan to use irfp240 please maintain the gate resistor with 47 ohm. Others mosfet might be change the gate resistor depends on rds-on of mosfet. Notice that lower Qrr and Trr will provide low thd. Look at the datasheet for each mosfet than u will get some info from it. 22uh with 1uf or 1.5uf is good for low impedance speaker, i do tested with irf540n 22uh and 1uf filter caps. +48 0 -48 vdc and pushing 2 ohm load without any problem, only core T106-2 warm. IRFB4710 with +45 0 -45 can load as minimum as 1ohm speaker impedance.

Recommended for output filter caps must be above 100 vdc type. i do test before with 1uf 63vdc and that caps explode with maximum power even with irf540n. others component survive. so i change it to 250vdc 1 uf caps, no problem so far with high volume. next week i`ll build new amp both ucd and 200wrms and all will be powered by ir2153 smps. After 2 week testing ive got good result with them. i`ll post here after finish. at the mean time i`ll post some unfinish module ( not assemble yet in amp box just for sharing and reference ).

module i`ve finish now for pre-amp hi gain pre-amp with 0.0001% thd lol hahahaha, i dont remember where i get the circuit probably searhing on the net via google and i do simulate it with multisim. so far so good, hi gain, low thd, original use TL074 but i change it to LM324N and nothing different. dc protect also ready. i have schematic from apex at diyaudio for output shortcircuit protection but it seems little complicated i think . for ucd i think we can use ne555 and opto

 

[irvynejay]

i have irfp 240 and 250 540 and also irfb4227 but my gate driver is ir 2113..is this good enough?
some told me that pcb of ucd not working so i make the one you posted on other thread

 

[norazmi]

IR2113 is ok for replacement IR2110. Dont use irfp240N its not good with class D. But irfp250. irf540 and irfb4227 is ok. IRFB4227 beat all mosfet u have its fast, good Qrr and Trr gate resistor can be lower as 15 ohm with irfb4227, will be low thd more clear and powerfull with enough current of supply rails. recommended +65-75 0 -65-75 at 15 ampere or 20 ampere. Look at the original schematic for the part replacement for each supply rails. Its need to be match or failure to run smoothly. R15, R17, R16, R5, R13, C4, C8, C2 and R7 need adjustment with proper power supply.

p/s - your pcb shiny lol

 

[norazmi]

some picture testing with ir2153 smps, pre-amp lm324n , dc protect and 200wrms class D. Supply +48 0 -48 vdc.

 

[norazmi]

and this one is UCD, i already made 8 pcs of UCD amp, all working good until now, 6 pcs i give to my friend who need bass crazy without heating and they loved it.

 

[norazmi]

They all running with that smps without noise and hiss or any lol...

 

[norazmi]

IR2153 smps and Class D 200wrms LIVE

Watch it LIVE
[video=youtube;NSz2_lFohT4]http://www.youtube.com/watch?v=NSz2_lFohT4[/video]

 

[irvynejay]

d amp

almost done

 

[norazmi]

U have beutiful pcb!! I like it, ure using toner transfer method?