TDA7498 100W+100w Diy (u-PCB+power supply)

dinithm

Member
POWER SUPPLY

power output (230W - 270W)
driver - sg3523 SMT(PUsh and pull)
primary switching fet -(2x) IRF3205
core(EI33 PC40)
switching frequency - 100khz
pulse width 45%
working voltage - 9v-16v
output voltage - 36V regulated (unregulated 42V max @13.8v input)

View attachment 250W copy.pdf250W copy copy.jpgprint.jpgDSC_9623.jpgDSC_9576.jpgDSC_9572.jpgDSC_9557.jpg
 

dinithm

Member
AMPLIFIER
Driver TDA7498(power s so36 package)
output power 100+100W @8ohms 36V
power supply 36V(39v max)single supply (approximately 7A max)
logic supply 3.3V 100mA OK
output-2x fullbridge

DSC_9543.jpgDSC_9546.jpgDSC00025.JPGDSC00026.JPGDSC00027.JPGDSC00028.JPGDSC00029.JPG
 

smps_fan

New member
Great mate ! It´s only great I love it !!! Is this project your own design ? Can a push pull inverter be made that it also works in a constant current mode ? Regards Smps_fan
 

smps_fan

New member
Thank you for your answer.
I see that is a voltage mode converter you´re right. Thanks for the link. What I mean would it work, if I measure the voltage from a shunt and link that voltage over a operational amplifier to the inverting imput of the sg3525 that I also have constant current ? I want to keep that constant voltage mode but I also want to make it short circuit prove without blowing a fuse. The fuse should only blow, when the circuit fails in a critical way.
 

smps_fan

New member
Oh that looks very cool ! I will try that thank you very much ! Why I didn´t get this idea looks very simple !
I appreciate it. Many thanks my friend !
 

ramuji

New member
hiii dini, have you measured the switching noise around pin 9 and at pin 1 of tda74..? Is it possible for you to post the pcb drawing here?
 

dinithm

Member
[video=youtube;MiC0cApv2PU]https://www.youtube.com/watch?feature=player_detailpage&v=MiC0cApv2PU[/video]
 
Last edited:

dinithm

Member
sorry ,I forgot Eagle schemaic and PCB files

View attachment TDA7498 print.pdf

but you can try
print top layer and bottom layer on PHOTO paper using LAzerprinter
then transfer it to duble side copper board torner transfer method
 

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