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I wanna use TPS63002 to boost Li-ion battery voltage to fixed 5v, in order to power my Raspberry Pi3
I use WEBENCH tool to get the right values of Capacitors and Inductors, and the resulting circuit is attached here:
The resulting circuit could convert voltage and drive fixed 5v, but IC and the Inductor are overheating, and consuming 220mA!
Could you please tell me where is my mistake?
I saw that the board had some shortcut on it
So, I modified that and replaced the chip with a new one
Now, output voltage is 5v for currents lower than 100mA, but for larger currents, output voltage drops to 3v even if input voltage is 4.2v
Do you know what is the main cause of this issue?
Yes, you're right, that was the PCB issue
Now, with thickened and shortened tracks, and closer elements (Capacitors and Inductance), that issue is solved
and we have stable 5v output, but until current is lower than 500mA
For currents more than that, the output voltage goes up and down between 4.8v and 5v, and this causes problems for my USB Devices connected to Raspberry.
Do you have any idea how to solve this issue too?
The schematics is the same as before.
Thanks
Thanks, sure, I'll follow those instructions
what capacity should be the that output capacitor?
And, another question: what do you mean: "good ground connection" ?