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) to improve performance of inductive power transmission against the variations of Rx input power (P) and dual-output DC power (P+ P). Conventional IPM structures either fail to generate regulated outputs (e.g., V and V) when the required P+ P exceeds P or suffer from low power-conversion efficiency (PCE) when P exceeds P+ P due to voltage regulation and protection. To overcome these challenges, the proposed ASIC offers the unique capabilities of 1) generating multiple regulated outputs [Formula: see text] directly from L with single-stage conversion, 2) efficient CM operation with active rectification, enabled by adaptive switching control (ASC), 3) charging a large capacitor ( C) with the purpose of operating as a shared-inductor boost converter (SBC), transferring energy from C to C and C, when , and 4) efficient voltage-power regulation (VPR). A proof-of-concept chip was fabricated in a 0.35-μm 2P4M standard CMOS process occupying 1.35-mm active area. In measurements, the proposed ASIC was able to successfully provide regulated [Formula: see text] and [Formula: see text] despite significant variations in P, P, and P. Moreover, the chip extended the peak output power range by 750% and improved the PCE by 1.3 times and 8.1 times thanks to the ASC and VPR, respectively.