Scale able class D 1250W UCD style and Non-UCD style - PCB Ready. Tested.
- Thread starter norazmi
- Start date
Hi Pergo, sory late reply because its school holidays here for 2 weeks, n now i come back but my family still at vacation so i leave them with my cousin there. hehehe, the class H is from group buy 2kwts so im just try to mount the component on the board and make a test and its not mine 
. I`ve little difficult thing to get component such as analog opto and still on order from local market here let see if i can get them as soon as possible so i`ll post it at current thread with group buy.
regards.
Azmi
. I`ve little difficult thing to get component such as analog opto and still on order from local market here let see if i can get them as soon as possible so i`ll post it at current thread with group buy.regards.
Azmi
Ok I'll try to make a layout,.. is this the one you referred in class D 200w rms forum, that can go as low as 1ohm?
Btw if u want more power i can give u schematic with ir2110 as a driver, this thing can produce more power and u need huge power supply and capacitor bank unless u re using smps then u will save the weight. i`ve 4 pcs amp with ir2110 and one amp i put with my computer as sound system and its working alright all the time. I tested with mosfet irf4710 u can drive as low as 1 ohm
regards,
Azmi.
Thats not class D 200 W, its non ucd with IR2110 + TL074, with irfb4710 u can drive as low as 1 ohm
Glo , please email me with hi quality picture, seems blur to me. xwebmaster@gmail.com, IR2110 is good no problem, i`ve with me few like that and they work ok.
Im sorry forgot to mention regarding Pin6&7 which refer to TL074. Put 1kohm resistor from ground and goes to pin 6&7 TL074 like u did on ur pcb there is 47kohm, so change it to 1kohm. and for the gate resistor its ok with 27R. Please if u can add one more coupling caps 1uf 250vdc at +vcc to -vee rails. Its better to avoid bass pumping effect.
Hi Norazmi,
thankyou for advice. In my schema, i change direction of tl07 to be U3,U4,U1,U2 for suitable with my pcb, as in original Schema U2,U1,U3,U4. the resistor you mean is R2? i have a wrong value in last PCB, and corret them to 1K. Pls see my pcb again. i have all part of them, and need to build it soon.
Regards
Glo
thankyou for advice. In my schema, i change direction of tl07 to be U3,U4,U1,U2 for suitable with my pcb, as in original Schema U2,U1,U3,U4. the resistor you mean is R2? i have a wrong value in last PCB, and corret them to 1K. Pls see my pcb again. i have all part of them, and need to build it soon.
Regards
Glo
Yes i mean R2, your input section for TL074 is wrong. Please check it again,R14 680ohm input should go to R1 47kohm that clamp with ground.
one more before u power it up, this setting only support max +/- 50vdc. For more u need adjustment, its like adjustment with ir2110 ucd. But better u test this amp with at least +/-35 or +/- 45 vdc. Then we can go more than that.
regards.
one more before u power it up, this setting only support max +/- 50vdc. For more u need adjustment, its like adjustment with ir2110 ucd. But better u test this amp with at least +/-35 or +/- 45 vdc. Then we can go more than that.
regards.
Azmi, sorry for late respon, here i post my last PCB after correction. Pls verify, and if it's ok, i will post bottom layer of PCB layout. one more question, what is better choice for 4 ohm load, IRFP250N or IRF640N? i read in datasheet irf640n much faster then IRFP250N but with higher RDS on.