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http://dx.doi.org/10.7471/ikeee.2016.20.3.265

Improvement of Initial Operating Characteristics of SCALDO Regulator by Pre-charger  

Kwon, O-Soon (LIG Nex1 Co., Ltd.)
Son, Joon-Bae (LIG Nex1 Co., Ltd.)
Song, Jong-Gyu (LIG Nex1 Co., Ltd.)
Publication Information
Journal of IKEEE / v.20, no.3, 2016 , pp. 265-272 More about this Journal
Abstract
A SCALDO(Supercapacitor Assisted LDO) regulator is a newly studied regulator to improve the efficiency of a LDO regulator. Commonly a LDO regulator has very low efficiency and a SCALDO regulator can improve it considerably because this regulator can reuse meaninglessly wasted energy at the LDO regulator by a supercapacitor witch is attached between input and a LDO regulator. However this regulator has several challenges because it is a being studied regulator. One of them is an overvoltage issue. At initial operating of this regulator, a supercapacior is totally discharged and input is connected with a supercapacitor and a LDO regulator in series. Thus, input voltage is enabled to a LDO regulator and this input voltage is a significant value to a LDO regulator because commonly input voltage is bigger than twice output voltage. In this paper, to solve this overvoltage issue, we proposed a new SCALDO regulator that has a pre-charger for charging a supercapacitor before starting operation. And we found that a proposed SCALDO regulator can properly reduce overvoltage of a LDO regulator through experiments.
Keywords
SCALDO; LDO; Supercapacitor; Pre-charger; Regulator; DC-DC converter;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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