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how to design solar and dc input power supply for my Tiva C module

Other Parts Discussed in Thread: TPS2121, BQ25895

Dear Experts,

i want to develop the power supply for re charge my device(TivaC Uc based) battery . that power supply design must support solar input instead of dc adapter, can you please suggest the idea to complete that, 

1. which battery is suitable for that (lithium ion battery is ok for that)

2. which regulator or dc to dc converter IC is suitable for charge my battery with DC adapter and Solar(at time any one of them).

3.in my home some days solar can't generate the output that why i ask the design support solar and DC input features. if the design support solar and DC i can charge the battery when solar does not perform well.

4. if that design is possible, can i connect the device power pin directly to the battery charging terminal.

5. Solar panel 5v link: https://www.banggood.in/5V-10W-Portable-Solar-Panel-Slim-Light-USB-Charger-Charging-Power-Bank-Pad-p-1297325.html?rmmds=buy&cur_warehouse=CN

6. Dc adapter 5v 2A

This is my another threads about this topic 

https://e2e.ti.com/support/microcontrollers/other/f/908/p/818221/3046552#3046552

https://e2e.ti.com/support/power-management/f/196/p/820456/3035683#3035683

regards

surya