BQ51013B: #AD_EN does not allow for adapter charging when wireless charging is prioritized (EN1-low EN2-high)

Kevin Hunckler

Part Number: BQ51013B
Other Parts Discussed in Thread: BQ51013

Tool/software:

I am troubleshooting the same problem that is described in the related/linked forum post: "BQ51013B: Prioritized wireless charging".

It seems that when I have EN2 pulled high and EN1 pulled low (utilizing the internal 200K pulldown) the wireless charging is allowed, but the adapter charging is never allowed even when the the wireless TX is not present.

This manifests itself as #AD_EN remaining HIGH regardless of whether the wireless charger is present.

When EN2 and EN1 are both low, the handoff between wireless and adapter charging are as described in the datasheet.

This part does appear to be behaving like the BQ51013 instead of the BQ51013B as described in the "related" post. (I double checked the marking on my part and it is labeled as BQ51013B).

Any additional thoughts on this issue would be helpful.

Thanks.

7 months ago

0 Bill Johns 7 months ago

TI__Guru* 75686 points

Hi Kevin

I will check this in the lab and update you tomorrow.

0 Bill Johns 7 months ago in reply to Bill Johns

TI__Guru* 75686 points

Sorry could not get to lab today will have update tomorrow.

0 Bill Johns 7 months ago in reply to Bill Johns

TI__Guru* 75686 points

Hi Kevin

Kevin Hunckler said:
It seems that when I have EN2 pulled high and EN1 pulled low (utilizing the internal 200K pulldown) the wireless charging is allowed, but the adapter charging is never allowed even when the the wireless TX is not present.

I have looked at this in the lab and do not see this behavior. Unit will follow Table 8-3 (BQ51013B). EN2 can be used to switch between Wireless or Wired Power.

Do you have a schematic of your design I could review?

Power management

Power management forum

BQ51013B: #AD_EN does not allow for adapter charging when wireless charging is prioritized (EN1-low EN2-high)