BQ24079: fast charge current is lower than setting

Roy Chou1

Part Number: BQ24079

Hi Team,

I use the meter to measure the I fast current input to battery. But the result is much lower than setting.

Do you have any idea which factor may cause the issue? I think meter will have a low resistance but I think that don't have large impact due to battery is high impedance.

Regards,

Roy

over 4 years ago

0 Raheem over 4 years ago

TI__Mastermind 21590 points

Hello,

What battery voltage do you see this behavior?

What is VIN Voltage?

Is there any load on the OUT pin?

0 Roy Chou1 over 4 years ago in reply to Raheem

TI__Genius 13085 points

Hi Raheem,

Below is my charge current chart and schematic. As you see when voltage meet around 3.897V and the IC will go CV mode but the spec shows the voltage point will be 4.059~4.141V. Do you have any idea for this issue? Thank you for your support.

Regards,

Roy

0 Raheem over 4 years ago in reply to Roy Chou1

TI__Mastermind 21590 points

Discussion continued offline.

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BQ24079: fast charge current is lower than setting