LM5163-LM5164設計計算：Power management forum

David Huang

Prodigy 40 points

Part Number: LM5163-LM5164DESIGN-CALC
Other Parts Discussed in Thread: LM5164

Tool/software:

2604.LM5164.pdf

1. Is the U1 (LM5164) wiring correct?
2. Is the inductor value used for L1 correct?

Thanks

12 days ago

0 ARPITA NATH 12 days ago

TI__Expert 6642 points

Hi David

What is the input voltage and load current?

Note that there is no ripple injection circuit in the schematic. Would recommend going through the datasheet in details.

Also 4.7uF 25V output capacitors might not be sufficient, because of derating/DC bias effect, effective capacitance would be much lesser at 10V.

Kindly revise the schematic and share the filled in calculator https://www.ti.com/tool/LM5163-LM5164DESIGN-CALC

Regards

Arpita

0 ARPITA NATH 12 days ago in reply to ARPITA NATH

TI__Expert 6642 points

Hi David

Sorry for missing Vin, I out from the schematic. For Vin_max=54V, Iout=1A, the peak inductor current at 1000khZ would be ~1.19A whereas the min current limit threshold for the is 1.25A. You may want to have more margin by increasing L value.

regards

Arpita