BQ25505: VSTOR output current issue

HL Tang

Prodigy 40 points

Part Number: BQ25505

Hi,

I am using BQ25505EVM-218 with an input of 1V and 120mA.

However charging output VSTOR limit current to 26mA. How to increase the output current?

over 7 years ago

0 Upal Patel over 7 years ago

TI__Intellectual 1640 points

Hello,
Can you provide me information about the load you're charging?
Thank you very much,

0 HL Tang over 7 years ago in reply to Upal Patel

Prodigy 40 points

Hi,
My target output charging load is 100 mA. I'm using the electronic load slowly increase the load current. But the VSTOR only provide 28 mA max. If I increase the load, the VSTOR voltage will drop.

Thks.
Regards,
HL Tang

0 Upal Patel over 7 years ago in reply to HL Tang

TI__Intellectual 1640 points

Hello,
BQ25505 operates in different regions.
Can you please make sure the VSTOR voltage is greater than VSTOR_CHGEN?
What's the VSTOR voltage when the current is 28mA?

0 HL Tang over 7 years ago in reply to Upal Patel

Prodigy 40 points

Hi,

Without the load the VSTOR is 3.6V, when increase the load current until 29mA the VSTOR drop to 3.2V.

0 Upal Patel over 7 years ago in reply to HL Tang

TI__Intellectual 1640 points

Hello,

Have you change any settings on the EVM? Or are you running off default settings?

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BQ25505: VSTOR output current issue