DRV8701: PWM frequency

Jacob Feder

Prodigy 30 points

Part Number: DRV8701
Other Parts Discussed in Thread: UCC27201A

What is the maximum PWM frequency of the EN pin?

over 6 years ago

0 Rick Duncan over 6 years ago

TI__Guru** 114905 points

Hi Jacob,

In the datasheet recommended operating conditions, the maximum recommended PWM frequency of the EN pin is 100kHz.

0 Jacob Feder over 6 years ago in reply to Rick Duncan

Prodigy 30 points

Are there any similar parts that can use higher PWM frequencies? I'm hoping for something in the 500k-1M range.

Thanks

0 Rick Duncan over 6 years ago in reply to Jacob Feder

TI__Guru** 114905 points

Hi Jacob,

There are not in the motor driver portfolio. Most motor drivers do not require such high PWM frequencies.

There are half bridge drivers that could do the job. Please see: www.ti.com/.../products.html

We will also contact someone who supports half bridge drivers for assistance.

0 Richard Herring over 6 years ago in reply to Jacob Feder

TI__Mastermind 23105 points

Hello Jacob,

I support the half bridge driver devices in the High Power Driver product line. There are a number of half bridge drivers that can work at the higher switching frequencies, most of them fall in the 100-120V rated category which is used in 48V DC-DC conversion.

If you can give me some more detail on the application requirements, I can give some more specific advice on parts.

Assuming the 100V rating is high enough I would start with the LM5101X family of drivers, or UCC27201A. If higher drive current is required the UCC2721x drivers offer 4A drive current. We do have higher voltage drivers, with 600V rating, but they do not have as low propagation delays, and are not as well suited to high frequency operation. If you need higher voltage than 100-120V reply back with some details and I can make recommendations.

Regards,

Richard Herring

0 Jacob Feder over 6 years ago in reply to Richard Herring

Prodigy 30 points

Thanks I will take a look at these

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DRV8701: PWM frequency