LM629: About the minimum pulse signal

Ryu Yamashita

Part Number: LM629

Tool/software:

Hi team,

While checking the PWM MAG pin of this device, a short pulse of about 70ns was output when the motor was stopped.
Are there any possible causes?
Also, what is the minimum pulse width?
The device I checked this time is LM629M-8/NOPB.

Regards,
Ryu.

over 1 year ago

0 Keerthivasan Kumanan over 1 year ago

TI__Mastermind 18475 points

Hi Ryu,

Please give me until tomorrow to look into this and get back to you.

Best,

Keerthi

0 Ryu Yamashita over 1 year ago in reply to Keerthivasan Kumanan

Genius 3685 points

Hi Keerthi,

Thanks for the reply.
Will you be able to give me an answer?

Regards,
Ryu.

0 Keerthivasan Kumanan over 1 year ago in reply to Ryu Yamashita

TI__Mastermind 18475 points

Hi Yamashita-san,

Min pulse is the following:

4/fclk

What is the normal operation?

Do you have a block diagram of your whole setup? can you send a schematic?

Can you capture the PWM waveforms as well as the current?

Best,

Keerthi

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LM629: About the minimum pulse signal