Title | ||
---|---|---|
A Generic Power Management Circuit for Energy Harvesters With Shared Components Between the MPPT and Regulator |
Abstract | ||
---|---|---|
This paper presents a novel power management circuit (PMC) for harvesting the energy from the ambient. The proposed PMC comprises an energy harvester, a startup, a dc–dc boost converter, and a dc–dc buck converter. The PMC is capable of working with various low-power energy harvesters and can track the maximum power point after every 4.5 s. To achieve the maximum power point tracking (MPPT), an open-circuit-voltage-based method is used to transfer the maximum power from the energy harvester to the power optimized boost converter. The proposed MPPT scheme works for a wide range of equivalent source resistance of the energy harvester in the range of
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$20~\Omega $ </tex-math></inline-formula>
–1
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{M}\Omega $ </tex-math></inline-formula>
. An auxiliary energy harvester is used for the startup to avoid any external supply. Regulated voltage across a load is provided by the buck converter which features sharing the switches and inductor with the boost converter. The complete circuit is designed, optimized, and simulated in 180-nm mixed-mode CMOS technology using three different types of energy harvesters, which are precisely characterized and modeled. Post-layout simulated results are presented for the input power ranging from 150 nW to
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$500~\mu \text{W}$ </tex-math></inline-formula>
for different values of source resistances ranging from
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$20~\Omega $ </tex-math></inline-formula>
to 1
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{M}\Omega $ </tex-math></inline-formula>
. For a source resistance of 100
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{k}\Omega $ </tex-math></inline-formula>
, the efficiency of the boost converter is 39.91% and 89.91% at available power of 156 nW and 2.5
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{W}$ </tex-math></inline-formula>
, respectively. The buck converter is able to regulate the load voltage to 1 V across the load resistance ranging from
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$100~\Omega $ </tex-math></inline-formula>
to 2
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{k}\Omega $ </tex-math></inline-formula>
. |
Year | DOI | Venue |
---|---|---|
2019 | 10.1109/TVLSI.2018.2885928 | IEEE Transactions on Very Large Scale Integration (VLSI) Systems |
Keywords | Field | DocType |
Resistance,Radio frequency,Rectennas,Buck converters,Energy harvesting,Vibrations,Inductors | Boost converter,Topology,Computer science,Voltage,Maximum power point tracking,Inductor,Energy harvesting,Electronic engineering,CMOS,Maximum power principle,Buck converter | Journal |
Volume | Issue | ISSN |
27 | 3 | 1063-8210 |
Citations | PageRank | References |
3 | 0.40 | 0 |
Authors | ||
2 |
Name | Order | Citations | PageRank |
---|---|---|---|
Gaurav Saini | 1 | 3 | 0.40 |
Maryam Shojaei Baghini | 2 | 86 | 29.67 |