LT 3652 multi chemistry battery charger _ issues

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kuttansunbird

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Hi all,

I have designed a 2A solar powered 12volt SLA battery charger using LT3652(From Linear Technology- datasheet- **broken link removed** ). My panel is 16Watts(Vmp 16.8 and max current1.45A). I have made a 2 layer PCB and followed the same reference design given by LT. However during sunny days when the the panel delivers max current the chip is heating up a lot and going to thermal foldback mode quickly. Though i havedesigned it for 2Amp application, its entering into to shutdown when the the current goes above 700mA!!!!

I will be highly thankful for your suggestions and advises...


Please find the attached schematics_page no 5....

Thanks for your time


Kuttan
 

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  • dc1688A_imp.pdf
    394.1 KB · Views: 313

Try this 15A LM358 :




Or just try this others projects :

 

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  • !!! 12-24V 3-Stage Solar Charge Controller PIC16F88 - Silicon Chip.rar
    619.8 KB · Views: 81
  • !!! Solar Panel controller 12F675.rar
    790.3 KB · Views: 145

hi,
thanks for the details...however i have a few questions on the circuit...
1) How efficient is this circuit?
2) I have found 80watts resistors in the circuit..Which i hope will be very bulky and leaky...


thanks for your time
 

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