Tool/software:
Hello TI Support team,
We are currently developing a system that is limited to ~82W Power Supply. It is required to boost Power Supply 1 (12.3VDC 6.7A: This is the max available we have to design around) to 19VDC to power a small form factor computer.
Testing has shown that while the PC boots there are inrush current spikes and PS 1 cuts out, thus the boot fails. However, if we charge a 1F supercapacitor(Part Number of one we have tested with: SCAP,PBLS-1.0/27) to 19V with regulated current, then with some strategic relay/switching we successfully power on the computer using the 1F and 19VDC output without tripping Power Supply 1.
I came across the BQ24640 product when reading TI "How to Quickly and Safely Charge Supercapacitors" literature. Will the BQ24640 be an appropriate choice for this solution? If so in Fig. 11 from the data sheet could you connect the load (sff pc) to utilize the Supercapacitor and the 19VDC from the dc-dc converter?
Are there other methods, circuit designs, products or components that you could recommend that would offer a solution for us?
NOTE: Our SFF PC is to boot on power, therefore we would like to have the appropriate circuitry to charge the supercapacitor, monitor the charge level via a microcontroller, then switch the power using the microcontroller to the PC to initialize the booting sequence and eliminate any inrush current from PS 1.
Thank you for time and help in advance!
All the best,
Jacob
