LM25143-Q1: LM25143-Q1

Hello,

Can you please help fill out the LM5143DESIGN-CALC tool for this review. 

Also since you referenced PMP31202 multiphase (4 phase) design I am expecting the schematic to look similar to it other than the components on FB and compensation.

• In your schematic for the secondary controller, the FB1 pin should either be connected to VDDA or GND to set the MODE. Make sure only one of them is populated at a time. 
• Primary controller DEMB connection should be either VDDA or GND, not both.
• For a 4 phase design, it is recommended to operate in the 200kHz - 300kHz range. The primary RT resistor should be 110kOhm not 10kOhm.
• There is no need to have individual UVLO enable for the two LM5143 controllers EN1,EN2,EN3, and EN4 should be connected to a singular UVLO circuit. 

Regards,

Jimmy

Hi Jimmy,

Good morning,

We modified the document as you said and attached here.

Kindly Review it.

FYI,

Our expectations :

Input: 36V

Output : 0 - 24 V 30A

If you have any other recommendations, kindly advise us. 

Schmatic of LM5143.pdf

Hi,

Let me loop Eric to help continue this review.

Regards,

Jimmy

Hello Jayaraman

Please reply with the completed quick-start (You can download at  https://www.ti.com/lit/zip/SNVC229 ) as Jimmy mentioned. 

-EL 

Hello Jayaraman

Would you please reply with the completed quick-start? (You can download at  https://www.ti.com/lit/zip/SNVC229 )

-EL