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nope, the supercap continue charging always. The real problem is when it is fully charged and start as backup power supply. Teorically tps63020 works fine with 5volt output untill input is 1.8 volt. under this voltage the output goes low.
In may case this is not happen. the output goes low when the voltage on supercap is about 3,5 volt and not 1.8v.
can it a problem of voltage divider VTH?
THANKS
nope, the supercap continue charging always. The real problem is when it is fully charged and start as backup power supply. Teorically tps63020 works fine with 5volt output untill input is 1.8 volt. under this voltage the output goes low.
In may case this is not happen. the output goes low when the voltage on supercap is about 3,5 volt and not 1.8v.
can it a problem of voltage divider VTH?
THANKS
Hi Marco,
This does not seem to be caused by VTH signal. VTH signal is used to stop charging the capacitor when its voltage reaches ~5.1 V, and to recharge it whenever its voltage drops to ~4.7 V.
Best regards,
Milos
Hi Marco,
Did you have a chance to make the scope plots?
Could you also send us the part number for the supercapacitor that you are using?
Best regards,
Milos
Hi Marco,
Thank you for the update, and sorry to hear that.
If you need any further help, please let us know.
Best regards,
Milos