Hi Jeff,

Thanks for the support.

Can i use BQ25606 for 3A charging.

Thanks,

Ashok

Hi Jeff,

Thanks for the support.

Can i use BQ25606 for 3A charging. and  we  are connecting two parallel 3.7V@1700mAh Batteries for this configuration is it ok to use BQ25606  iC.

Please confirm. below attached our block diagram. 

Thanks,

Hi Jeff,

Thanks for your continuous support ,

Can i get BQ25606 schematics,BOM,PCB layout.

Thanks,

Ashok 

Hi Jeff,

Thanks for the design file.

Below attached our 3A charging design schematics and usb schematics.

Can u please confirm the schematics and give me feedback if any addition need to be done.

And also one conformation from your side is,

What is the maximum output current of SYS without battery when the adapter is connected to VBUS.

Thanks,

Ashok3010.SCHEMATIC1 _ PAGE1.pdf

Hi Jeff,

Thanks for your time.

Can i know 

What is the maximum output current of SYS without battery when the adapter is connected to VBUS.

Thanks,

AShok

Hi Jeff,

Thanks for you time and continuous support,

We designed  BQ25606  circuit on single layer board.

Is it ok  to use Please confirm.

does it affect on any performance issue ? 

Thanks,

Ashok

Hi Jeff,

Thanks for your support .We are testing charging ic. Battery is not charging.

Below are test reports.

Input voltage-5V

Power good-low

STAT Pin - High

battery voltage 3.5V Capacity 2000mAh.

Ntc We are not using so i connected 10K And 10K Ohm.

And also input voltage and current is 5V And current fluctuating from 0.1A to 5mA.

Below attached out schematics for you reference.

Thanks,

Ashok

Hi joel,

Thanks for your time.

We changed capacitor value to 22uF.

Below are the test reports without battery:

Input supply voltage : 5V @ 36mA Without battery connection.

Bat vin voltage without battery 3.3V to 4.2V Fluctuating.

Sys pin voltage without battery 3.3V To 4.2V Fluctuating.

Vset pin open

STAT Pin :  blinking

PG Pin : low

CE Pin : low 

Below are the test reports with battery:

Input supply voltage : 5V @ 130mA With battery connection.

Bat vin voltage with battery 3.5V Battery voltage .

Sys pin voltage with battery 3.5V Battery voltage .

Vset pin open

STAT Pin :  1 Min Low after 1 min 2.1V To 2.5V

PG Pin : low

CE Pin : low

And also after 2 min input supply current  Fluctuating from 0.135mA to 80mA.

finally battery not charging.

Please let me know if any changes need to be done in schematics.

Thanks,

Ashok

Hi Joel H,

Thanks for the suggestion.

we designed new two boards 1) one in single layer.

                                                2) other one in two layer

1) Below are the test results of one layer board 

input voltage : 5V current support upto 5A

STAT Pin : High.

PG Pin : low 

Vset : open 

CE Pin : gnd.

OTG Pin : Gnd.

Bat pin : Battery voltage 3.5V

Sys pin voltage : 3.6V.

No Load on sys pin 

Input current fluctuating form 3mA to 15mA. 

Finally battery not charging.Below attached schematics and layout of both single and two layer layout file  please check and confirm.

2) Below are the test results of two layer board 

input voltage : 5V current support upto 5A

STAT Pin : low.

PG Pin : low 

Vset : open 

CE Pin : gnd.

OTG Pin : Gnd.

Bat pin : Battery voltage 3.5V

Sys pin voltage : 3.6V

No Load on sys pin.

battery charging at 1.2A not 2A . we design i charge of 2A ie Rlim is 340 ohm  . 

why its working like this.Please suggest me if i missed out anything in design.

Our customer looking for single layer board solution.is it ok design BQ25606 in single layer please confirm. 

pdf_CHARGER_IC_DESIGN.pdfCHARGER_IC_DESIGN.brd

Hi Joel,

Any suggestion.

Can i get your mail id.

Thanks,

Ashok

Hey Ashok,

I looked at your layout and the ground loop is very poor. The impedance between PMID and the charger PGND plane must be very high as compared to the EVM. A very thin trace around the inductor is the only path to PGND. Similar things can be said for the BAT net and any other trace sitting on the BAT net.

I don't believe the critical filtering capacitors are making a filtering loop back to the IC ground.

I would also make sure that the thermal pad is connected to the ground plane.

If you refer to the Layout Guidelines in the BQ25606 datasheet, you will note the critical capacitors and traces, which in your board design may not be providing the required effect for both stability and regulation accuracy.

Regards,

Joel H

Hey Ashok,

Any comment on the above? I just want to be clear that I still think your best option is a two layer board, at the very least.

And the second layer must effectively be a solid ground pour. All non-ground pin can be routed on the top layer.

Regards,

Joel H