Other Parts Discussed in Thread: TPS61088,
Tool/software: WEBENCH® Design Tools
Hello,
I was looking to design a boost converter so I looked up some sample designs from your TPS61022EVM-034 and webench design tool to find one appropriate from my application. I noticed some differences between the former and latter (attached below) and I would like some further explanation if that is possible. I was also looking at specifying whether the TPS61088 would be better suited for my solution as my load would be a smart phone device charger with 15 serial addressable WS2812B LEDs and an Arduino nano v3.0 MCU unit.
Comparing the evaluation module to the webench sample design for the TPS61022:
1) Why are the input capacitors in the evaluation module compared to the webench design so drastically different and would it affect the performance of my system if i follow the webench sample design for my specific application?
2)What should my FB voltage be to ensure a stable 5V 1.5A-3A output for my 3.7-4.2V 1.2A-3A single cell lipo battery. Also what is the purpose of R3 in the evaluation module's voltage divider?
3)Should mode be grounded for my application?
4) Is the extra 22uF output capacitor used to simply smooth the output signal or does it have to do with the frequency produced in cohesion with the 1uH inductor
5) Should i look at implementing a battery protection circuit to protect from undervoltage situations at the input of the converter since this is an ultra low voltage IC?
Thank you in advance for your feedback!