DRV8302：The Vgvdd is always low

user4784519

Part Number: DRV8302

During the use of drv8302, EN has a situation where the internal drive power GVDD is always output as 0. When EN_GATE is pulled high and low, GVDD is always 0V. When EN_GATE is pulled high, the nfault signal keeps reporting errors and resetting is useless. Seek advice!

Best wishes!

over 3 years ago

0 Adam Sidelsky over 3 years ago

TI__Guru 61280 points

Hello,

Have you tried a second PCB or DRV8302 device?

Does this occur on many devices? Is this a new behavior or has it always been this way?

Regards,

-Adam

0 user4784519 over 3 years ago in reply to Adam Sidelsky

Prodigy 40 points

hello,

Tried the second PCB or DRV8302 device, both are the same.

Always like this

0 user4784519 over 3 years ago in reply to Adam Sidelsky

Prodigy 40 points

By the way, does DRV8302 require soldering temperature?

0 user4784519 over 3 years ago in reply to user4784519

Prodigy 40 points

I found the problem, it was that pin 57 was not soldered. But now I have a new problem, that is, input PWM wave, nfault will report an error, DVDD will become 4.3V

0 Adam Sidelsky over 3 years ago in reply to user4784519

TI__Guru 61280 points

Hello,

At which PWM input duty cycle and frequency does this occur?

Can you show us any scope plots of the time when the fault occurs?

Regards,

-Adam

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DRV8302：The Vgvdd is always low