How can I connect 2 LM5145 modules as Master & Slave with common input and common output ???

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Other Parts Discussed in Thread: LM5145


In SLAVE MODULE, is it necessary to connect the FB PIN to the VCC or should it be connected to the MASTER FB?

 Should the COMP's MASTER PIN be shared with SLAVE?

There is an example schematic for this configuration??

Thanks,

over 7 years ago

0 JohnTucker over 7 years ago

TI__Guru**** 191445 points

I do not directly support LM5145, but generally if a part is intended to be operated in parallel, it will specifically feature that in the datasheet. Usually the devices will include a pin such as "ISHARE" or "SHARE" that is used to ensure balanced current sharing. Additionally you may see terms in the IC description such as "stackable" or " dual phase" or "multiphase" that indicate they are intended to be operated in parallel.

If you post your input voltage, output voltage and current requirements, we can direct you to the best solution. That said, LM5145 is a controller. With the proper selection of switching FETs, it can possibly meet your requirements with a single LM5145.

0 Robert Loke over 7 years ago

TI__Prodigy 700 points

HI,

there is a very good blog about how to make a dual phase master slave shared design you will find probably helpful.

e2e.ti.com/.../how-to-design-a-simple-two-phase-current-sharing-synchronous-buck-regulator-using-a-voltage-mode-controller

Best Regards,
Robert L

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How can I connect 2 LM5145 modules as Master & Slave with common input and common output ???