LMR54410: LMR54410FDBVR Frequency question asking

Hi,

I would like to ask what is the output current? Is the input voltage usually 15V at work? What is the input and output voltage and output current corresponding to the waveform you gave? In addition, from your schematic diagram, the value of the output inductance is too large. Hope you can provide some more specific working conditions for checking. Thanks.

Aurora

Input 16V, output 1.2V, current 400mA

May I ask whether the starting mode of LMR54410 is to start the machine with reduced frequency? There is no shock at room temperature, and whether the shock at low temperature is related to the increase of ESR at low temperature of aluminum electrolytic capacitor? Please explain the cause of the shock during the starting process

Hi,

Oscillation is generally due to the resonance of the parasitic inductance of the line and the resistance and capacitance. The ESR you mentioned is possible. There are FPWM and PFM versions of LMR54410, and the FPWM version will not reduce the frequency under light load. Can you provide the SW waveform corresponding to the above figure and the waveforms of input voltage and load current? Thanks.

Aurora