An Ambient Energy Harvesting Interface for Battery-Free Wireless Sensor Nodes
- Resource Type
- Conference
- Authors
- Liu, Chi-Wei; Huang, Cong-Sheng; Lo, Wen-Po; Chen, Po-Hung
- Source
- 2024 IEEE Wireless Power Technology Conference and Expo (WPTCE) Wireless Power Technology Conference and Expo (WPTCE), 2024 IEEE. :459-462 May, 2024
- Subject
- Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Power, Energy and Industry Applications
Wireless communication
Wireless sensor networks
Renewable energy sources
Power measurement
Modulation
Regulation
Energy harvesting
battery-free system
power management
multi-input multi-output converter
- Language
This paper presents a low-quiescent-power battery-free energy harvesting interface for micro-watt to milli-watt applications with a single-inductor dual-input dual-output (SIDIDO) buck-boost converter. The system contains one renewable source input, one regulated output and one bidirectional energy transfer node with a storage capacitor for storage and reuse the energy. To achieve high power conversion efficiency (PCE) with micro-watt input power, we embedded dynamic-power-gating under-voltage lockout (DPG-UVLO) circuit, dynamic-voltage-feedback (DVFB) and pulse-frequency modulation (PFM) control to reduce quiescent power. The measurement quiescent power is 1.9 µW and the peak PCE is 86.4%.