BQ51050B: Functionality of EN2 pin

Sevender sharma

Part Number: BQ51050B

I am bit confused about functionality of EN2 pin. From datasheet i understand like, this pin is for setting the priority and if this pin is low then USB wired charging will be preferred. Means if low is there on EN2 , if only wireless charging input is there it will charge from that but once the USB power is plugged in then external battery charger will charge the battery.

Please clarify this.

over 5 years ago

0 Nick Brylski over 5 years ago

TI__Mastermind 19195 points

Hi Sevender,

This is correct, setting LOW will set priority for adapter over wireless charging. HIGH will disable adapter and only use wireless charging. if you intend to use this feature you will need to include additional FET for adapter input. Check out figure 37.

Best,

0 Sevender sharma over 5 years ago in reply to Nick Brylski

Prodigy 105 points

Hi Nick,

Thanks for your reply.

So, i would be pulling down that EN2 pin to Ground. When Adapter is not there then it will charge with wireless charging and whenever adapter plugged in it will switch to Adapter charging.. Am i right??

Please confirm my use case scenerio.

0 Nick Brylski over 5 years ago in reply to Sevender sharma

TI__Mastermind 19195 points

Hi Sevender,

This is correct.

Best,

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BQ51050B: Functionality of EN2 pin