class d Earthquake PH-10000W

[norazmi]

thank you for comment non i stay my home beacuse covid 19 ,many shop for electronic parts close.
to day i write about 12v class d from low pass filter cor
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i already make this class D amp discrete you can refer to mr kartino design ucd xlite discrete, its has very stable design and no heat, high efficiency.

 

[surachit]

my home

 

[norazmi]

woahhhhhhhhhhh i like that

 

[bucks bunny]

woahhhhhhhhhhh i like that

Your really do? That's funny as for me this looks like a nightmare
Maybe I am too German anyway....

 

[surachit]

class d for education the circuit use ne555 generate triangle 130khz lm393 mod audio ,triangle to pwm ,sent to class d ampliflier
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[norazmi]

ne555 is not good, too old and one mistake create noise like engine, hows your circuit with 555? and 130khz is too slow for me, at least 200khz for class d, there are many new advance mosfet good for high switching.

 

[surachit]

class d 500k by foodland , this circuit have ic lm311,ic nand gate 7400 and ic ir2110 L filter 25uh c105/250v
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[norazmi]

1k res for bias? are u sure, can u make test with 4 ohm load and monitor the voltage after the resistor 1k

 

[norazmi]

add totem pole at each gate mosfet hi and lo with bd139 and bd140, that will reduce ir2110 stress.

 

[norazmi]

there is something problem with your circuit drawing not correct lol, i hope you make exact circuit with your test

 

[NMOS]

class d 500k by foodland , this circuit have ic lm311,ic nand gate 7400 and ic ir2110 L filter 25uh c105/250v
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Hello Surachit


I know this circuit from Bangkok - Banmore Thai Electronic Shop

I am Farlang, my Holiday Thai Girl friend / now my wife

bought this circuit for 1500 THB 7 years ago as an

assembled working Class D PCB module in Banmore for me.


Later I have make new PCB design for PA amplifier look attachment.

 

[NMOS]

Hi Surachit


If you want stable working amp, you will need a lot updates

look D4K5 Schematic and you dont waste your time

Gerber PCB file you can have for free


LM311 is not good solution, Tl071 input design is better

IR2110 need Buffer

use IRFP4227 Mosfets

Inductor T157-2 need 38-42 turns

 

[surachit]

correct circuit i forgot zd5.6v for op amp
my wave side many circuit keep class d 500k by foodland - Class-D - LN-Electronic

 

[norazmi]

okay this one little better, what mosfet ur using?

 

[Bigun]

maybe a mod can fix it, the title of this thread is misleading, I expected some 10kW of fireworks.......

 

[norazmi]

maybe a mod can fix it, the title of this thread is misleading, I expected some 10kW of fireworks.......

lol

 

[surachit]

แก้ไข ล่าสุด

 

[norazmi]

i think aux supply for 7400 better use to-92 7805

 

[NMOS]

แก้ไข ล่าสุด

this amp cant stable working

fur Fun projekt its ok

 

[surachit]

mini d by foodland , this circuit has lm311 irf9540 and irf540 vc+_45v class d fre 100khz coil 150uh c 2.2uf

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