LM5122 multiphase

William Verry

Other Parts Discussed in Thread: LM5122

What is the upper limit that the LM5122 will share a single error amp, how many chips can I connect the "comp" pin together? I want to do an 8 phase boost converter.

over 10 years ago

0 Juan Paulo Fung over 10 years ago

TI__Expert 3870 points

Hi William - I'm moving your thread to the correct forum and alerting the Apps Engineer to review your request.

Regards,
-JP

0 EricLee over 10 years ago in reply to Juan Paulo Fung

TI__Guru 59001 points

Hi
Basically, there is no problem if there is an external synchronization clock per phase.
Regards,

0 William Verry over 10 years ago in reply to EricLee

Prodigy 185 points

So what is my margin, could I go with a 12 phase, one master and 11 slaves?

0 EricLee over 10 years ago in reply to William Verry

TI__Guru 59001 points

Hi
Unfortunately, there is no data.
It is relates with PC Board layout and parasitic element. I guess the error amplifier output can reach up to about 10~15 inch without serious noise coupling and the parasitic element effect in general layout, but I am not sure.
Regards,

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LM5122 multiphase