Hi There:
Greeting! I'm helping my customer who using the LM5161 and found the efficiency was lower than expected
could you help to advice the solution to improve that?
a. eff (max)= 80% < 90% (spec) condition: Vin: 30~100V Pout: 5V/1A & 6V/1A
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Hi There:
Greeting! I'm helping my customer who using the LM5161 and found the efficiency was lower than expected
could you help to advice the solution to improve that?
a. eff (max)= 80% < 90% (spec) condition: Vin: 30~100V Pout: 5V/1A & 6V/1A
Hello Kay,
The most effective way to increase efficiency is to reduce the Switching frequency. Bear in mind, that you may choose to adjust the buck inductor value, while doing so, try to keep the DCR low.
Also you may be abe to get more efficiency by supplying an external VCC to the LM5161?
Looking at your results your Efficiency results they appear to be low in comparison, have you confirmed that the Switch node is stable and the converter is working correctly?
Also where are you measuring Vin and Vout? Please verify your input and output current measurements are accurate too?
Hope this helps?
David.
Hi Sam:
Thanks again, sorry for late, our customer has feedback us the schematic and layout file as attached
perhaps you could provide more idea to us for improve the efficiency.