BQ24160EVM-721: be24160

Chiyul Yoon

Prodigy 40 points

Part Number: BQ24160EVM-721
Other Parts Discussed in Thread: BQ24160

Hi,

I set the power supply as 5V (I_limit 3.75A) and connected to USB input.

I connected Li-Po battery to proper port and set the program as below.

I can see that the 'Charger status' indicate 'Charging from USB'.

I checked the TS pin voltage and it it 2.48V.

But the power supply shows only 7mA!

Battery is not charged whatever I changed the options of program.

7mA is actually used for LED indication. (Power supply shows 0mA if I turn off 'Enable STAT/INT Outputs'.)

What should I do for the charging??

What did I missed?

Please help me to solve the problem.

over 5 years ago

0 Jeff F over 5 years ago

TI__Guru**** 166996 points

HI Chiyul,

What is the voltage close the IC BAT pin? Is there buck converter operating, i.e. is there a square-ish waveform on the SW pin?

Regards,

Jeff

0 Chiyul Yoon over 5 years ago in reply to Jeff F

Prodigy 40 points

The closest IC BAT pin on EVM is C5.

I can see that the voltage is as same as BAT voltage (about 3.8V).

And there was no square like signals. It is just DC 3.8V.

0 Jeff F over 5 years ago in reply to Chiyul Yoon

TI__Guru**** 166996 points

Hi Chiyul,

For some reason the buck converter is not switching. It will will only do that if the input voltage is above input OVP (6.5V) or battery voltage >= battery regulation voltage. Does the buck converter switch if you change to IN input? Just to confirm you still have the USBtoGPIO connected and it still reads as battery regulation = 4.2V? It will autoreset to 3.6V if the watchdog watchdog timer goes away.

Regards,

Jeff

0 Chiyul Yoon over 5 years ago in reply to Jeff F

Prodigy 40 points

Hi Jeff

I also tried connecting power supply to IN port at EVM.

Charging did not worked also.

I can only read the battery regulation is 4.2V when I set the 'Reset Watchdog Timer' option as 'reset every 5 Sec'.

However, 'Battery Regulation Voltage' is changed to default value (3.6V) if I turn off 'Reset Watchdog Timer'.

0 Jeff F over 5 years ago in reply to Chiyul Yoon

TI__Guru**** 166996 points

Hi Chiyul,

Just to confirm the EVM has its inductor installed, yes? Can you send a pic of the EVM and your connections to it?

Regards,

Jeff

0 Jeff F over 5 years ago in reply to Jeff F

TI__Guru**** 166996 points

Hi Chiyul,

Any update on this?

Regards,

Jeff

0 Chiyul Yoon over 5 years ago in reply to Jeff F

Prodigy 40 points

Hi,

Sorry to delayed response.

I checked the EVM board and there is an inductor.

I also have my own PCB which contain BQ24160.

It can charge my Li-Po battery which is tested on EVM.

So I think the EVM is broken or have some trouble with unknown issue.

Thanks for your support.

Power management

Power management forum

BQ24160EVM-721: be24160