JAJSFS7B July 2018 – February 2019 LM5180-Q1
ADVANCE INFORMATION for pre-production products; subject to change without notice.
The input capacitor, CIN, filters the primary-side triangular current waveform. To prevent large ripple voltage, use a low-ESR ceramic input capacitor sized according to Equation 23 for the RMS ripple current given by Equation 24. In this design example, choose a 4.7-µF, 100-V ceramic input capacitor with X7S dielectric10-µF, 50-V ceramic input capacitor with X7R dielectric and 1210 footprint.