Webbench does not support the LM43603 running at 2.2MHz

Keith Emery

Prodigy 40 points

Other Parts Discussed in Thread: LM43603

WebBench will not allow the switching frequency to be adjusted to 2.2MHz for LM43603.

It's only allowing the frequency to max at 829.98KHz.

Keith

over 10 years ago

0 Kevin Ip over 10 years ago

TI__Intellectual 2155 points

Hi Keith,

What is your input voltage range? You may be hitting the minimum on-time of the device, so the switching frequency is limiting to 829KHz.

0 Keith Emery over 10 years ago in reply to Kevin Ip

Prodigy 40 points

Hello Kevin,

Vin is 10 - 25V but I actually don't necessarily need that high of Vin. 10 - 18 would work for my application. Thanks for your reply! Keith

0 Keith Emery over 10 years ago in reply to Keith Emery

Prodigy 40 points

Hello again,

I changed the Vin value to 10 to 16. My nominal is 12v. This allowed me to change the frequency to 1.00Mhz which will be fine for my design.

Thanks, Keith

Power management

Power management forum

Webbench does not support the LM43603 running at 2.2MHz