Abstract
In this paper, we present a single-inductor triple-input-triple-output (SITITO) buck-boost converter in a 0.18-$\mu\text{m}$ CMOS process for dual-source energy harvesting. The converter operates in the single-source mode, dual-source mode (DSM), and backup mode automatically by detecting the input and output conditions. Converter operation in the proposed DSM enables extraction of power from both a photovoltaic cell and a thermoelectric generator in one switching cycle for efficient power extraction. The cycle-by-cycle source-tracking approach selects the appropriate input source according to the maximum power point of the energy transducers. The adaptive on-time circuit with the proposed adaptive peak-inductor-current (APIC) control adjusts the on-time of power transistors to obtain high conversion efficiency under different input voltages. The experimental results demonstrate that the proposed SITITO converter has a peak efficiency of 84.4%. When compared with the conventional constant peak-inductor-current control, an efficiency improvement of 11% is obtained via the proposed APIC control.
| Original language | English |
|---|---|
| Article number | 8388277 |
| Pages (from-to) | 2741-2750 |
| Number of pages | 10 |
| Journal | IEEE Journal of Solid-State Circuits |
| Volume | 53 |
| Issue number | 10 |
| DOIs | |
| State | Published - 1 Oct 2018 |
Keywords
- Adaptive peak-inductor-current (APIC) control
- buck-boost converter
- cycle-by-cycle source tracking (CCST)
- DC-DC converter
- dual source
- energy harvesting
