LM5123-Q1: Boost circuit to get 24V,10A on output using single LiFePo cell 3.6V 30Ah- does it doable?

Hello, 

Thanks for reaching out. This output power might be too high for one phase only and might affect the thermal performance of the circuit, would you in case consider using a multiphase approach? We're looking forward hearing from you. 

Kind regards,
EM 

Hello EM,

Yes, it can be considered. Any proposal for a solution? Shall I use double LM5123-Q1?

How to synchronize both IC?

best regards

M.M. 

Hello, 

A good fit might be the LM5122 (https://www.ti.com/product/LM5122 ), which is multiphase capable. Let us know if further help is needed. 

Kind regards,
EM

Hi EM,

thanks, this IC needs higher input (4,5V). Not 3,5 (as min).

Or does it can work with 3,5V?

best regards

M.M.

Hello,

The minimum required voltage for the start up is 4.5 V. If there is another rail available in your system (like a 5V one for example), you could use this one to power up the IC. Otherwise the solution with the two LM5123 is still valid and the circuitry for the load sharing will look like the one presented in this article: 

https://www.ti.com/lit/an/snva826/snva826.pdf (Figure 4). 

Let us know if you have further questions. 

Kind regards,
EM