| IP개요 |
we present a self-resonant boost converter integrated circuit (IC) for ultra-wide range source tracking of thermoelectric generators (TEGs). The tracking is efficiently achieved using a self-controlled resonant frequency generator (SRFG). The SRFG, which is realized using a harmonic oscillator, defines the switching frequency of the converter by operating under three conditions: underdamping, overdamping, and critical damping. The maximum power point tracking (MPPT) controller, which synchronously operates with the SRFG, tracks the source impedance of the TEG. The MPPT is achieved by controlling the ontime of the power switch using a programmable delay controller (PDC). To achieve high efficiency over a broad range of source impedance, we use dual mode operation using critical conduction mode (CRM) and discontinuous conduction mode (DCM).
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