Transformer‐Reuse Reconfigurable Synchronous Boost Converter with 20 mV MPPT‐Input, 88% Efficiency, and 37 mW Maximum Output Power
ETRI Journal(2016)
摘要
This paper presents a transformer‐based reconfigurable synchronous boost converter.
The lowest maximum power point tracking (MPPT)‐input voltage and peak efficiency of
the proposed boost converter, 20 mV and 88%, respectively, were achieved using a reconfigurable
synchronous structure, static power loss minimization design, and efficiency boost
mode change (EBMC) method. The proposed reconfigurable synchronous structure for high
efficiency enables both a transformer‐based self‐startup mode (TSM) and an inductor‐based
MPPT mode (IMM) with a power PMOS switch instead of a diode. In addition, a static
power loss minimization design, which was developed to reduce the leakage current
of the native switch and quiescent current of the control blocks, enables a low input
operation voltage. Furthermore, the proposed EBMC method is able to change the TSM
into IMM with no additional time or energy loss. A prototype chip was implemented
using a 0.18‐μm CMOS process, and operates within an input voltage range of 9 mV to
1 V, and an output voltage range of 1 V to 3.3 V, and provides a maximum output power
of 37 mW.
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关键词
Thermoelectric,Reconfigurable,Static power loss
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