11.5 A 2-Phase Soft-Charging Hybrid Boost Converter with Doubled-Switching Pulse Width and Shared Bootstrap Capacitor Achieving 93.5% Efficiency at a Conversion Ratio of 4.5
Mo Huang, Yan Lü, Rui P. Martins
Abstract
High conversion ratio (CR) boost converters are in high demand for LED backlighting in a multitude of products including smartphones and tablets. The conventional boost (CB) converter with high CR has large inductor current ripples, thus requiring high-quality inductor to mitigate the efficiency degradation. Meanwhile, a narrow switching pulse width in the high CR converters limits the switching frequency (fSW). The hybrid converter with flying capacitors (CF) can widen the pulse width for the same CR, but hard-charging has been an issue in previous works [1]-[3].
Topics & Concepts
InductorConvertersCapacitorPulse-width modulationBoost converterMaterials sciencePulse (music)Electrical engineeringElectronic engineeringOptoelectronicsVoltageEngineeringAdvanced DC-DC ConvertersSilicon Carbide Semiconductor TechnologiesWireless Power Transfer Systems