Hey folks,
I am working on a project where I am using LGS4056 Charging IC. Here is its Datasheet 1. Chinese : LGS4056 Datasheet
2. English: LGS4056-EN Datasheet .
The supply going to LGS is through pogo pins which are connected to supply from another power supply PCB(which has usb power supply). And the issue I am facing is as following; a] When the pogo pins of both pcbs are attached to each other when the supply pcb is already powered on, everything works fine.
b] If i keep the pogo pins attached and turn on the main switch (ie the wall mounted switch, where charging adapter is used) then the LGS doesn't turn on or doesn't indicate the led indication and also doesn't charge the battery.

In the power supply pcb there is nothing much, the 5V is directly provided to the pogo pins even before the LDO(post ldo supply is used to power up the MCU), main issue is even if there is enough power supply on pogo pins why the lgs in not working.

Schematic is attached below.

I am not able to find the issue whether it is in the Power supply pcb or the Charging IC's PCB. Please help to resolve the issue. Reply if more information is needed.

Thanks!!

 

For 'hot swap', which is effectively what you are doing, the datasheet suggests that R1 should be 10Ω.

 

For 'hot swap', which is effectively what you are doing, the datasheet suggests that R1 should be 10Ω.

Would u mind pointing where exactly in datasheet is it located. I am not able to find such. Please

 

Top right of page 7 of the English datasheet from the link in your original post.

 

Would u please explain how this condition is a Hot Swap. Because i don't have much idea about Hot Swap thing. And why and how is it occurring in my project. Please explain according to my mentioned problem.
Thanks for the guidance btw!!

 

Did you notice this?

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Also, Even after changing the R1 with 10 ohm as well as i tried with 22 ohm the results are same when my battery voltage reaches around 3.6V(LiPo 4.2V) the lgs doesn't turns ON. Still not found the solution.