Hi Ti Support
I need to design supercap back up feature in my design, please advise for any reference circuit , IC or possible solution.
1. backup needed for 22Sec
2. System Power consumption around 5W.
3. Industrial temperature range -40C to 85C
4. Feature Charging control , protection etc.
Thanks
Kunal Barot
Hello Kunal, thank you for posting to the forum.
5 Watts for 22 seconds is 108 Joules. That is a lot of energy.
The concept for super cap backup usually uses both buck and boost modes of power conversion.
PMP9766 is a good example of this process.
Here is another example, called "Last Gasp"
Details of the design would depend on:
Vin to the system.
Vout, Iout, Pout required to the load.
And operating temperature affects the SCaps, their capacity can be reduced by a factor of 3 at cold temperatures.
Many more examples may be found at:
