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The impedance modeling of passive device is mandatory for EMI prediction of power converter on printed board circuit (PCB) level. The black-box node-to-node impedance function (NIF) model, which extracts the connecting impedance matrix from measurement, can be used as the most general representation. However, the most recent development of this model is still based on the assumption of ideal shorting...
Supercapacitor assisted low dropout regulator (SCALDO) is a new approach to designing high-efficiency DC-DC converters by combining supercapacitors and a commercial LDO. In this approach, the end-to-end efficiency of the converter is increased by a multiplication factor, in the range of 1.33 to 3, compared with the efficiency of a linear regulator circuit with the same input-output voltages. SCALDO...
In this paper, a novel flicker-free ac/dc LED driver without electrolytic capacitor is presented. The driver comprises a single-stage boost-forward converter and a bidirectional buck-boost converter, which serves to bypass the low frequency ripple. Therefore, electrolytic capacitor is no longer needed. Compared with other electrolytic capacitor-less topologies, the proposed driver has the advantages...
A new control and interface system is to be introduced for a series of thermal printers which emerged as the result of obsolescence of some of the components within a well in demand and high precision operating set of printers congruent to the market they were designed for. The obsolescence of some of the main components led to the need for creation of new design for these printers with improved features...
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