A Battery to 15~36V Hybrid Boost Converter with 14.4x Max VCR for LED-Lighting

This paper presents a hybrid boost converter with a high voltage conversion ratio (VCR) up to 14.4x for LED-Lighting applications. By utilizing two inductors and flying capacitors, the proposed converter surpasses VCR of the conventional boost topology by threefold, thereby simplifying controller design. Moreover, the reduced voltage stresses enable the utilization of low voltage power switches, leading to improved power efficiency. Furthermore, higher switching frequency and lower switching node voltages contribute to a reduction in inductor volumes, enabling higher power density. Designed and simulated in a 180 nm Bipolar-CMOS-DMOS (BCD) process, the proposed converter can generate a 15
$\sim$
36-V output from a 2.5-5-V Li-ion battery, capable of delivering a maximum load of 150 mA. Simulation results demonstrate peak efficiencies of 94.3% and 89.6% at VCR values of 6 and 14.4, respectively.