What exactly the difference between the LTC3350 and LTC 3351?
LTC3350 is Buck charger and Boost converter right ? Does that mean If the my supply is 18V Output Voltage will always be less than 18V right ?
And about Boost converter it'll only boost the SuperCap stack Voltage not the input supply right?(like If I use supercaps of 2.7 and stack them 4 in series (10.8) and Output Voltage can be 12V?
Both are step down converters - buck (not boost): output voltage will always be less than input voltage.
Both the LTC3350 and LTC3351 have a buck charger and backup boost controller. The system voltage when in charge mode is the same as the input voltage.
The biggest difference between the LTC3350 and the LTC3351 is that the LTC3350 has an ideal diode front end and the LTC3351 has a hot swap front end if the application requires to be hot plugged in/out.
Thanks for your reply.
I was suggested to use a Timer based solution where the end use can set the time interval of discharge period.(But I don't think this is possible).
I/P is 24V,30A.
O/P when in Step down mode(Normal Operation) -24V,2A.
O/P when in step up mode(Back-up Power) - 23/22V ,1.8A(300ms).Now If the user wants to make it upto 500 ms or 1sec I was told to have Timer based solution in this case. Is it even possible?
sad that no one is responding.
I don't know how or why you would do a timer base backup system. I understand a minimum backup time is needed to provide a proper backup. Below is a link to a backup calculator to help determine what size capacitors and current limit is needed for a specific backup power.