Hi all,
I selected the L6981C50DR for my buck DC DC power module. A quick overview of my application, I am going to use this power module to convert a typ 12.8V from a smart battery to 5V @ I_out_max= 500mA (Based on experimental values, also this value is the one used when calculating the capacitance and inductance and not the 1.5A specified in the data sheet) and operational current of around 120mA with spikes at around 300 mA hence the choice of 500mA, I will use this 5 volts to feed to an esp32-c3-devkitm-1 I will attach a screenshot for the schematic I made in Kicad and also the external components references and values. When I wanted to simulate the design in eDesignSuite, I came across a few values that I found myself struggling to figure out. It is the AC Current Rating, ESR Min and ESR Max of the capacitors as those values are not specified in the data sheet because, from what I understood, they vary depending on the application and conditions. I am using SimSurfing from MuRata to determine the actual capacitance when in DC Bias (to verifiy that in bias the capacitance is still within the required range) but I could not link the other values (Like the impedance, resistance ...) to what I need. Could you please help me determine the above mentioned values so I could add them to the simulation? I want to later on compare the simulated values to the experimental ones.
External components:
- Cin: GRT31CR61H106KE01L Multilayer Ceramic Capacitors MLCC - SMD/SMT 10 uF 50 VDC 10% 1206 X5R AEC-Q200 RoHS Compliant
- CinA: GCM31CR71H105KA55L Multilayer Ceramic Capacitors MLCC - SMD/SMT 1 uF 50 VDC 10% 1206 X7R AEC-Q200 RoHS Compliant
- CvCC: same as CinA
- CBoot: GRT188R71H104KE13D Multilayer Ceramic Capacitors MLCC - SMD/SMT 0.1 uF 50 VDC 10% 0603 X7R AEC-Q200 RoHS Compliant
- L: MSS1038T-333MLC Power Inductors - SMD 33uH Shld 20% 2.3A 93mOhms AECQ2
- Cout: GRJ32EC71E226KE11L Multilayer Ceramic Capacitors MLCC - SMD/SMT 22 uF 25 VDC 10% 1210 X7S
If I mistakenly forgot about an important data that I did not provide please inform me.
Thanks!
