LM5143-Q1: LM5143-Q1

Hi Jeremy,

1. L65008 must be placed between VMAIN and Cin cap C65025 

2. All HOL and LOL pin should connect to MOSFET Gate directly with 0 ohm.

3. Use Webench to verify the circuit design, especially Rsense and COMP

B R

Andy

Hi Andy,

Switching frequency should set to 400KHz~460KHz, to keep away EMC limit value.

Some electrical parameters are marked on the schematic, like DCR, ESR, caps, inductance.

Could you help to calculate Rsense and R&C value of compensation.

Any other information need,please let me know.

Thanks!

Best Regards

Jeremy

Hi Jeremy,

Do you list all output capacitors including cap close the load that connected to output rail ?

Hi Andy,

yes，all output caps are showed in the schematic "LM5143.pdf" attached before.

Thanks!

Best Regards

Jeremy

Hi Jeremy

Pls refer to attached calculation result.

LM5143-Q1 Quickstart Tool - E2E.xlsm

B R

Andy