BQ25606: device getting into a confused status

AlanCui

Prodigy 60 points

Part Number: BQ25606

Tool/software:

Hi， im using BQ25606 for my system power management.

Schematic:

The STAT LED blinks at 1.9Hz, VSYS switch between 3.7V and 4.2V , PG keeps LOW while applying 5V to the VBUS.

Condition: Battery connected, 10k resistor is apply to TS.

And i know that float the OTG pin is wrong, so i apply a external 5V to OTG pin using flying wire.

STAT:

As the datasheet said, 1Hz on STAT indicates a fault, but what a 1.8Hz shows?

VSYS:

over 1 year ago

0 Michael Emanuel35 over 1 year ago

TI__Mastermind 40655 points

Hello,

Just a quick schematic review, please use a 47 nF capacitor for the BTST capacitor as this is what we use.

Tying OTG high enables it. Please tie low.

What battery is attached? It does not look like one is, as SYS is going between 3.7V and 4.2V. Are you sure the battery pack protector is disabled?

Regards,

Mike Emanuel

0 AlanCui over 1 year ago in reply to Michael Emanuel35

Prodigy 60 points

The BTST should not affect the system as what i saw. And i dont really understand what OTG extactly do, would you like to explain what is "Boost Mode"(The topology showed in datasheet seems to be only buck mode can be apply), even more it didn't get back to normal whatever i tried tie it to both high or low. The battery is a 2000mAh 18650 Battery with protector, is the protector break the charging process down? i dont think so.