A Dual-Output Reconfigurable Shared-Inductor Boost-Converter/Current-Mode Inductive Power Management ASIC With 750% Extended Output-Power Range, Adaptive Switching Control, and Voltage-Power Regulation

This paper describes a dual-output, reconfigurable integrated power management (IPM) ASIC for inductive power delivery. The proposed ASIC operates either as a current-mode (CM) rectifier or a boost converter by sharing the receiver (Rx) coil (L Rx ) to improve performance of inductive power transmission against the variations of Rx input power (P Rx ) and dualoutput DC power (P L + P Hv ). Conventional IPM structures either fail to generate regulated outputs (e.g., V L and V Hv ) when the required P L + P Hv exceeds P Rx or suffer from low powerconversion efficiency (PCE) when PRx exceeds P L + P Hv due to voltage regulation and protection. To overcome these challenges, the proposed ASIC offers the unique capabilities of 1) generating multiple regulated outputs (V L = 2.6 V, V Hv = 3.9 V) directly from L Rx with single-stage conversion, 2) efficient CM operation with active rectification, enabled by adaptive switching control (ASC), 3) charging a large capacitor (C S ) with the purpose of operating as a shared-inductor boost converter (SBC), transferring energy from C S to C L and C Hv , when P Rx