A PWM Buck Converter With Load-Adaptive Power Transistor Scaling Scheme Using Analog-Digital Hybrid Control for High Energy Efficiency in Implantable Biomedical Systems.
IEEE Transactions on Biomedical Circuits and Systems（2016）
摘要
We report a pulse width modulation (PWM) buck converter that is able to achieve a power conversion efficiency (PCE) of >80% in light loads (<;100 μA) for implantable biomedical systems. In order to achieve a high PCE for the given light loads, the buck converter adaptively reconfigures the size of power PMOS and NMOS transistors and their gate drivers in accordance with load currents, while operat...
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关键词
Power transistors,Pulse width modulation,Buck converters,Implantable biomedical devices,Switching frequency,Power demand,Pulse width modulation converters
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