Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

  • State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 467 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ2004: How to config BQ2004 always in trickle charging mode?

James Chen3
Prodigy 70 points
Part Number: BQ2004
Other Parts Discussed in Thread: BQ24725A, BQ24610, BQ24170

Hi E2E support team,

Our customer request 4 cells 1520mAh NiMH pack(4S1P: 1.2Vx4 = 4.8V) with trickle charging supported. Please advise how to config BQ2004 with default trickle charging mode (Ie. charging period: 30 hrs). 

Power adaptor is 12V input, do we need a 5V LDO for BQ2004 Vcc input?

How to config the BQ2004 to control power path? Battery automatically backup if the power adaptor not exist. When power source presents, charger will perform the trickle charge . Your reply will be highly appreciated.

Thanks,

James Chen

 

  • 0
    TI__Guru 56650 points
    Yes. BQ2004 Vcc input need a 5V LDO from the 12V input.
    bq2004 doesn't integrate the power path control. You have to design your own power path control.
    Or, you can pick a power path control part (bq24170, bq24610, bq24725A...) and control NiMH charging profile by a host controller. I hope this application note can help you a little bit. www.ti.com/lit/an/slua843/slua843.pdf