BQ25618: PSEL connection

Toshiro Imi

Part Number: BQ25618

Could you help our customer to which PSEL connect to keep PSEL=high state in power up from no battery condition.

According to 8.3.3 Power up from input source section, REGN power up earlier than SYS (buck converter), so that I am thinking that PSEL should be connect to REGN in order to keep High logic state in such condition.

Best regards,

over 4 years ago

0 Jeff F over 4 years ago

TI__Guru*** 148825 points

Hi Toshiro,

I recommend pulling PSEL high to REGN.

Regards,
Jeff

0 Toshiro Imi over 4 years ago in reply to Jeff F

TI__Expert 6420 points

Thank you. I have suggested to your point in addition to power up sequencing of VBUS->REGN->buck DCDC->SYS specified in the datasheet page-17 "8.3.3 Power Up from Input Source".

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BQ25618: PSEL connection