BQ79600EVM: Board not turning on

Hello Frank,

Make sure you have jumpers J1 and J3 in the correct position for 5V operation.

Yes, I have went through the user guide extensively. The board is brand new, and hooking up the power supply does nothing to it

So, probing around with a mulitmeter. In the snip below, I get 5V at those test points, as well as pins 13-16 on the chip. The user guide isn't exactly clear as to if there is an led that signifies that it is on. Perhaps the board is working and I just don't know?

Hi Alexander,

Good Day. Can you help our customer with regards with his query about the indication when the EVM is on. I already tried to find the answer for his query but it seems the user guide is not clear about this topic. Thank you very much for the support.

Best Regards,

Ray Vincent

Here are some images of the setup. Very simple. Only the 5V supply is connected as well as the FTDI cable

1. I have tried using both 5V and 12V power (with the jumpers in the appropriate spots. Still nothing
2. The LEDs are not burned out because I can light them with the multimeter diode. I have used the multimeter and an O-scope to check node voltages as well as serial pings from Tera Term. Using the O-scope, the test ping is measured on pin 4 of the chip.
3. Pin 1 (DVDD) on the chip is floating from roughly (15mV to 25mV)
4. Pin 2 on the chip NFAULT stays at around 3.9V

Ok, well a further update. After sending out a periodic test pattern from Tera Term, the both LEDs turned on, but the chip also smoked, so I am pretty sure that this board is not going to work.

Frank,

I'm sorry you are having trouble with this. It is quite unusual that this board got damaged from these simple tests. I wonder if it wasn't good to begin with. I'm going to double check on my board and make sure that there is no step that we are forgetting.

Thank you for the response. No sense in wasting your time anymore. As I said, the chip smoked. We purchased through Digikey, so TI said I need to go through them for moving forward. The replacement process seems to be long, so I may need to just buy a new one.

Frank,

Some notes from my testing. I supplied the BQ79600 EVM with 5V and J1/J3 were in the correct configuration. At this point, I was seeing less than 0.002mA current draw. None of the LEDs are on yet. (one more comment, my current limit is set to 30mA. This device does not consume 0.5A, so I set it pretty low just in case)

After connecting the USB2ANY device, I used the GUI to send a wakeup command. The LEDs (D2 and D3) turned on and the device is now drawing about 3mA.

The only other thing that I can think of is that your USB2ANY was not programmed correctly. Can you double check that that you have version 3.1.1.4?

Frank,

Looking again, you are using the FTDI cable instead of the USB2ANY. Perhaps you can try with the USB2ANY first and confirm that it works with the GUI before moving onto the FTDI setup?

The chip burned up, so I will have to try to get it replaced before I can figure this out