A single-stage dual-output regulating voltage doubler (DOVD) is proposed for biomedical wireless power transfer (WPT) systems. Derived from the full-wave voltage doubler (VD) topology, it achieves ac-to-dc rectification and dual-output voltage regulation in a single stage by using only two power transistors. The DOVD’s inherent voltage conversion ratio (VCR) of 2 enhances the overall voltage gain of a WPT system, thus extending the transfer range against varying link conditions. To eliminate cross-regulation between the two outputs and provide fast load-transient responses, a parallel pulse-frequency modulation (PPFM) controller is proposed. In addition, a digital-tuning adaptive delay compensation technique with fast error-variation responses is proposed to achieve soft-switching in the power stage. Implemented in a 180-nm Bipolar-CMOS-DMOS (BCD) technology and operating at 6.78 MHz, the proposed DOVD achieves dual regulated outputs at 1.8 and 3.3 V, a VCR of up to 1.875, and a power conversion efficiency (PCE) of up to 92.95% over an output power range of 2.6–90.5 mW. It also achieves instant load-transient responses and unnoticeable cross-regulation during 25 ×\times load transients at both outputs.

中文翻译：

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用于无线功率传输的单级双输出稳压倍压器


提出了一种用于生物医学无线电力传输（WPT）系统的单级双输出调节倍压器（DOVD）。它源自全波倍压器 (VD) 拓扑，仅使用两个功率晶体管即可在单级中实现交流到直流整流和双输出电压调节。 DOVD 的固有电压转换比 (VCR) 为 2，增强了 WPT 系统的整体电压增益，从而根据不同的链路条件扩展了传输范围。为了消除两个输出之间的交叉调节并提供快速负载瞬态响应，提出了一种并行脉冲频率调制（PPFM）控制器。此外，提出了一种具有快速误差变化响应的数字调谐自适应延迟补偿技术，以实现功率级的软开关。所提出的 DOVD 采用 180 nm 双极 CMOS-DMOS (BCD) 技术实现，工作频率为 6.78 MHz，可实现 1.8 和 3.3 V 的双稳压输出、高达 1.875 的 VCR 以及在 2.6–90.5 mW 的输出功率范围内高达 92.95%。它还在两个输出的 25 ×\times 负载瞬态期间实现即时负载瞬态响应和不明显的交叉调节。