DRV8301: drv8301 power sourcing ability

user6544449

Intellectual 795 points

Part Number: DRV8301

Hello,

We use the PIN5(BSTA)\PIN6(SHA) as a power souring to connect AMC1305. In open load, we find the noise from drv8301.

Is it ok for our application? or how to reduce noise？ (PWM Frequence about 10khz.)

over 1 year ago

0 Alicia Rosenberger over 1 year ago

TI__Expert 8580 points

Hi,

Thank you for posting to the Motor Driver’s forum!

I will aim to provide a response by the end of the week.

Best,

~Alicia

0 Alicia Rosenberger over 1 year ago

TI__Expert 8580 points

Hi,

The bootstrap capacitor is intended to be used to turn on MOSFETs and is, unfortunately, not designed to be used as a power source.

Best,

~Alicia

0 user6544449 over 1 year ago in reply to Alicia Rosenberger

Intellectual 795 points

Hello Alicia,

The nois wai still occured when we removed the power circuit, and my VDD is 24V. If I turn up the voltage to 48V, the noise is louder. How we debug this chip? thaks!

0 Alicia Rosenberger over 1 year ago in reply to user6544449

TI__Expert 8580 points

Hi,

Do you notice any faults occurring, either being reported on the nFAULT pin or in the SPI status register?

Additionally, the following FAQ is a great resource for debugging BLDC motor drivers:

Quick Guide to Debugging Common Issues in BLDC motor drivers

Best,

~Alicia

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DRV8301: drv8301 power sourcing ability