BQ76PL455EVM: Problem comes out when I try to connect my Evaluation module with my PC

Hi Nicolás,

Welcome to the forum! the link that you shared refers to the bq76PL536 device, but your question seems to be related to bq76PL455. Can you please confirm which of these 2 devices you are using?

Best regards,
Leslie

Hi Leslie,

Looks like I have become clueless, I am using bq76pl536

Im sorry for this missunderstanding. Greetings,
Nicolás

Hi Nicolás,


Have you installed the Aardvark driver?

Roger

Hi Nicolás,

No problem, thanks for the clarification. Let's start with debugging the hardware to make sure your setup is correct before moving to the software.

* Can you please confirm if any changes have been done to the EVM?
* Please share a picture of your setup to see your connections as well as the jumper configuration you have on the board
* Are you using battery cells or a power supply with a resistor ladder? For initial debugging, I recommend using a power supply
* After power up, what is the voltage observed on BAT, LDOA, LDOD1, LDOD2, REG50 (5V) pins, and what is the current on BAT?

Best regards,
Leslie

Hi Roger,

Of course I did, they were succesfully installed. The problem comes when I try to communicate my module with my computer.

This EVM module has two USB connection points. One for an isolated connection and the other one without any isolation. I have checked both USB connectors and the same problem comes out.

Every pin has the required voltage but my suspect is about the SPI communication, maybe some signals are not entering the IC. What advice or recomendation could you give me?

Thanks a lot and sorry for my English

Nicolás

Hi Leslie,

I can confirm any changes were done on the EVM.
As you say I am using a power supply connected to some resistors.
After power up, the voltage you have asked me are:

BAT 18V (voltage I am using as supply)

LDOA almost 3V

LDO1 and LDO2 have no voltage

REG50 5V

Another question I would like to ask is, what is the LED called D3, D4 and D5 for? In the schematic sheet I can see where they are ubicated but I do not know their job.

I am including a picture of my EVM and its connections.

Hi User,

LDOD1 and LDOD2 have to be 5V when you power on the device.
Please double check the set-up.


Please connect Aarvark to the P5. It works better there.

Roger

Hi Nicolás

LED is optional for real system.
We added LED to indicate whether IC is ON or not.
LED will go away in sleep mode.

Do you see LED on when you connect and wake up the device?

Are you using real cell or resistor divider?
Can you show me how you power the 536evm?

roger

Roger,

Sorry I didn't answered. Looks like the Evauation Module was already damaged when I started to use it. Thanks for your attention anyway.

Before you close this tread, can you confim if the software you provide to show the measurements is valid for any single BQ76PL536A-Q1, or is it only used for the EVM?

Thanks a lot again and sorry for being absent for so long.

Nicolás

Hi Nicolas,

I am not clear what you are asking?

Our GUI can measure upto 32 devices and it can be used with your own custom board as well.

I am not sure whether I answered your question or not but let me know if my answers are not clear.

thanks

Roger

Roger,

Let me explain at all:

After knowing my EVM is dead (it was used before me and it was probably shortcircuited), I have made my own prototype which includes one single BQ76PL536A-Q1

My question was if I could still use the GUI you provide, so your answer is perfectly clear. One last question, could you recommend me some SPI to USB adapter for this job?

Thank you again
Nicolás