Bq24630EVM problem

With that high voltage and high current, please measure the PH, BTST and HIDRV pin voltage.

1. If the PH pin has a big ringing during the switching. The peak votlage of that ringing could be high than the IC's absolute operation range.

2. The EVM is designed for 3A charging current, if you do 10A charging, please check the buck FETs damage or not. If the FET damaged first, the IC also could get damage.

Thanks Wang5577 for your quick reply. 

I have some further questions about this chip:

Can this chip handle a 28V/14A supply (occasionally we might need to go up to 16A if the system needs it). And I need this chip to manage up to 16A current to the system, and around 10A charging current to my batteries (of course, when the system demands 16A, I would expect 0A goes to the battery, I know the DPM part). The adapter regulation current can be 14A. The battery's voltage is around 28V.

I know the Power FETs might be limited on the Eval Board, and we can change that in our actual application circuit. But the chip has to be able to do the work, and I just want to confirm this. Thanks.

bq24630 uses external sense resistor and external input FETs, BAT FETs and buck FETs. So, you can reduce the sense resistor value; change ACSET, ISET1 votlage to get higher current. Also, you have to change the FETs and check the dead time of buck FET switching to get a high current application.

Also, what is the battery charging voltage? If battery voltage is not too high, please reduce the input voltage. 28V input is too close to the IC's upper limit. For this high current application, we should give more margins.

So are you saying that all I need to do is to change the FET on the Eval Board to make it work? Just to make it specific, do you refer to Q1-Q5? And can you recommend me some parts that can fit into our application? How do I estimate the deadtime I need?

Thank you so much.