BQ76PL455A: Vref Fault

Raj Narnoli

Part Number: BQ76PL455A

I have tested 2 PCB's so far and both of them are working fine. While working with another PCB, I am getting wrong sensing voltages. So, I tested Vref and it is coming out to be 3.4V which is wrong. What may be the error?

P.S: Design is correct. I presume there is some connection fault. Which points should I check where there may be a fault?

over 5 years ago

0 Roger Hwang over 5 years ago

TI__Genius 10785 points

HI Raj,

Vref is off as you mentioned. What about VP, VDIG and V5VAO?

I suggest you to do two things for us.

1. Can you replace IC with another IC?

2. Schematic is hard to see. Can you download the PDF version?

Roger

0 Raj Narnoli over 5 years ago in reply to Roger Hwang

Intellectual 320 points

Thanks for the help. I got the right values. It was a soldering fault.

0 Roger Hwang over 5 years ago in reply to Raj Narnoli

TI__Genius 10785 points

Hi Raj,

Thanks for the update. I will close this tread.

thanks

Roger

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BQ76PL455A: Vref Fault