LM5143: Issue with load condition

Veera Chinnadurai A

Part Number: LM5143

I am using this part for 60Amps single output with dual phase(Each 30 Amps)

Output voltage is 14.3V.

While using mosfet TK100a10n1, I am not getting output.

While using mosfet PHP79NQ08LT,127, I am getting output voltage but not working with Load(I checked with type 1 & type 2 compensation ).

0 EricLee over 3 years ago

Hello Veera

Would you please send me the loop response measurement results with type1 and 2?
Please use the quick start tool https://www.ti.com/lit/zip/SNVC229 ., input your MOSFET parameters and check the power loss. Also please send the file.

-EL

0 Veera Chinnadurai A over 3 years ago in reply to EricLee

0 Veera Chinnadurai A over 3 years ago in reply to Veera Chinnadurai A

I given option for both Type1 & type2 in circuit (Comp network based on application note also tested & lm5143 calculation tool also tested).

PHP79NQ08LT,127 with this mosfet output voltage came but that too without stability only.

0 Veera Chinnadurai A over 3 years ago in reply to Veera Chinnadurai A

Dear Ericlee,

Please suggest me better MOSFET(Isolated) for this condition.

0 EricLee over 3 years ago in reply to Veera Chinnadurai A

Hello Veera

I found 100V AOT(F)66919 and 60V RX3L07BGNC16 have lower Rdson.

-EL

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