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TIDA-010042: Load enable pin cannot be activated by MCU

Part Number: TIDA-010042

Hi,

In TIDA-010042 board test, I am currently using E-load as a battery pack. While I am charging, there is no voltage at the load output (J7). Then, I checked Q5 and U12. U12 does not get L-EN signal from MCU. So, I checked software. I don't see any issue. The Battery output voltage is higher than Battery reconnect voltage. And Charged current is only 1A. So, still lower than overcharged current limit. 

So, is it because of software/hardware or because of E-load? Any suggestion, please.

Best regards,

Yin Min

  • Hi Yin Min,

    Please check if any other protection flag is active.

    Regards,

    Salil

  • Hi Salil,

    I found one issue on hardware side. One of the reference pin of battery current sensor IC (U15) is not grounded. Maybe because of this, potection flag is active. But after I soldered the reference pin to ground properly, there is no output voltage. When I removed the batt current sensor IC (U15), there is output voltage back. Then I changed new IC (U15), no output again.

    What is this issue and how can I solve that issue? 

    Best regards,

    Yin Min

  • Hi,

    Is there anybody who can advice for that issue?

    Waiting for the help.

    Best regards,

    Yin Min

  • Hi Yin Min,

    As I suggested earlier, some error flag is getting triggered. Since you have noticed that the output comes on without the current sense IC, it is very likely that the fault is overcurrent. Please check this and find out why the current sense IC is triggering over current. It is likely that the IC or the components used around it are faulty and is giving wrng outut.

    Regards,

    Salil

  • Hi Salil,

    In fact, I just give the panel voltage and check the battery output terminal (J5). I haven't turn on the CV E-load yet.

    Best regards,

    Yin Min 

  • Hi Yin Min,

    Please do not turn on the panel voltage supply first. Always start with the battery side power supply (simulated battery), and check if the circuit is fine before turning on the panel supply.

    Regards,

    Salil