A 24 V-to-1 V Low Input Current Ripple SC Hybrid Converter With Conducted EMI Noise Precompensation Filter and Current-Modulated Gate-Driver for Automobile Application

Abstract

The proposed low input current ripple (LICR) switched-capacitor (SC) hybrid converter effectively minimizes input current ripple by incorporating a precompensation active biasing electromagnetic interference (EMI) filter (PABEF), addressing EMI issues in automotive applications without requiring large external components. In addition, the current-modulation gate driver (CMGD) helps suppress conducted EMI noise at high frequencies. As a result, the LICR achieves a 74% reduction in input current ripple, EMI noise attenuation of 32 dB at low frequencies and 5 dB at high frequencies, and a peak efficiency of 93.3% at $V_{\mathrm { O}}$ / $V_{\mathrm { IN}}{=}1.8$ /24.