BQ24050 - Initial Action(with connection D+, D- or with disconnection D+, D-)

Hirotaka Matsumoto

Other Parts Discussed in Thread: BQ24050

Hello,

Would you mind if we ask about BQ24050?
A question is following;

<Question>
Is it possible to use fast charge to USB host as following procedure?
(D+, D- are disconnected in initial condition)
-Procedure-
1. The D+ and D- pin conncections inside the charger are disconnected to USB host.
2. Power on BQ24050(the In pin voltage is more than UVLO)
3. After 600msec with D+,D- disconnection, plugging action to USB host.

kind regards,

Hirotaka Matsumoto

over 11 years ago

0 Jeff F over 11 years ago

TI__Guru**** 166416 points

Since the IC starts D+/D- detection immediately following VIN rising above UVLO, detection will be complete 100-600ms after that event and the input current limit will likely be at 100mA (assuming D+/D- are floating). To change the charge current, you will need to change the state of the ISET2 pin.

0 Hirotaka Matsumoto over 11 years ago in reply to Jeff F

Guru 27585 points

Jeff F san,

Thank you for your prompt reply.
We got these situations thanks to your help.

Kind regards,

Hirotaka Matsumoto

Power management

Power management forum

BQ24050 - Initial Action(with connection D+, D- or with disconnection D+, D-)