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Part Number: LM2731
From the datasheet when the VOUT is 12V, and the Iout is 500mA.
However, when we test our board Vout will change bigger if the load is bigger.
Could you kindly help to check the schematic and give some suggestions about the issue?
Thanks a lot!
Firstly, please check the power supply's current limit, you can set it ahout 2A.
If there is still an issue, could you describe the issue clearly?
How much current is the bigger load?
Could you test the Vout, SW and Vin waveforms? It will be helpful for me to analysis the problem.
Step-up (boost) Switching Regulator Solutions
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In reply to Jing Ji:
In reply to gaogao01:
set power supply's current limit depends on your power supply equipment. You can check the instruction of your power supply.
another way, you can check the Vin waveform to check if power supply is current limit or not.
there is a easy way to check power supply's current limit, when the LM2731 works, you can test input voltage to check it is stable or not.
you can put a 100uF electrolytic cap in the output. it will make output ripple smaller.
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