DRV8711: Operating frequency of charge pump of DRV8711

Masami Michino

Part Number: DRV8711

Dear, All

The customer wants to know the operating frequency of the charge pump of the DRV8711.
There seems to be a problem that the noise generated by the operation of the charge pump in the past product has become a problem.
Please tell me the operating frequency of the charge pump.

Thanks, Masami M.

over 6 years ago

0 Rick Duncan over 6 years ago

TI__Guru** 114905 points

Hi Michino-san,

We will investigate and reply soon. This may take a couple of days.

0 Masami Michino over 6 years ago in reply to Rick Duncan

Genius 5070 points

Hi, Rick-san,

Thanks for your support.
I will wait your reply.

Thanks, Masami M.

0 Rick Duncan over 6 years ago in reply to Masami Michino

TI__Guru** 114905 points

Hi MIchino-san,

What type of noise has been seen in the past?

The charge pump frequency can vary depending on load. The frequency could be as high as 500kHz or as low as ~50kHz.

0 Masami Michino over 6 years ago in reply to Rick Duncan

Genius 5070 points

Hi, Rick-san,

Thank you for your answer.
Noise generated in past equipment is EMI noise.
It occurred with a single charge pump.

Thanks, Masami M.

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DRV8711: Operating frequency of charge pump of DRV8711