BQ24392: About CHG_AL_N pin

Tsukui Yusuke

Guru 21930 points

Part Number: BQ24392

Hi,

Could you tell me about how to determine the status of CHG_AL_N pin?
Customers want to know the criteria for CHG_AL_N pin going low.

Regards,
Yusuke

over 4 years ago

0 Malik Barton57 over 4 years ago

TI__Guru 64326 points

Hi Yusuke-san,

The columns left of the CHG_AL_N column state the criteria for when CHG_AL_N goes low. CHG_AL_N can be thought of as a open drain output.

0 Tsukui Yusuke over 4 years ago in reply to Malik Barton57

Guru 21930 points

Hi Malik-san,

Thank you for your response.
Is the judgment based on the VBUS voltage (>3.5V)?
Or does the device consider SDP / DCP discrimination?
Customers believe that 3.5V alone will determine status.

Regards,
Yusuke

0 Malik Barton57 over 4 years ago in reply to Tsukui Yusuke

TI__Guru 64326 points

Hi Yusuke-san,

CHG_AL_N is mainly determined by VBUS voltage. BQ24392 does determine SDP and DCP separately. SDP will start out with 100mA charging until enumeration has occurred.

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BQ24392: About CHG_AL_N pin