DRV8812 PWM frequency

NAOKI AOYAMA

Guru 11215 points

Other Parts Discussed in Thread: DRV8812

Hello,

My customer uses the DRV8812.

He wants to spin a motor as quickly as possible.

I think it is limited by PWM frequency and the motor specification.

Q1) How about the variation of the internal PWM frequency value due to the process variation?

Q2) How long it will take from ENABLE high to OUTPUT on ?

Of course I will explain the customer these values are not guarantee.

Regards,

Naoki Aoyama

over 10 years ago

0 Wilson Zuo over 10 years ago

TI__Mastermind 26065 points

Hi Naoki,

Q1) Internal PWM frequency is based on internal analog clock which is MAX +/-30% due to process variation.

Q2) There will be input deglitch time as in spec 1.3 ~ 2.9us which takes the major part of the total delay from inputs to outputs.

Customer can try our DRV8812 EVM for a quick spin within minutes.

Best regards,

0 NAOKI AOYAMA over 10 years ago in reply to Wilson Zuo

Guru 11215 points

Hi Wilson,

Thank you for your very fast reply.

Thanks,
Naoki Aoyama

Motor drivers

Motor drivers forum

DRV8812 PWM frequency