Stability and reliability of LTCC-based 5/12 ​V dual output DC-DC converter with high efficiency and small size

Noise mitigation in 12‐to‐5 V DC‐DC converter using an embedded metal layout strategy

“…We evaluated the EMI performance in a test environment based on the CISPR 16-1-1 and IEC 61000-6-3 standards [6]. The distance between the converter placed on a turntable and the receiver antenna (Rx Ant.)…”

“…is measured in both horizontal and vertical directions, and the height of Rx Ant. is changed from 1 to 4 m [6]. Figure 5 shows an accumulated EMI peak noise for the vertical and horizontal directions of the Rx Ant., respectively.…”

“…From EMI measurements, it satisfied the IEC61000-6-3 Class B standard. Based on the table 1 of [6], the proposed converter has a very small size and shows outstanding efficiency characteristics. First of all, we can see that the noise characteristics of the proposed converter with the embedded ground shielding layers have been improved.…”

“…To overcome the problems, several techniques such as layout strategies [1,2] and circuits with integrated a filter [3,4] have been proposed. In general, DC-DC converter is implemented by a flame retardant (FR-4)-based printed circuit board, whereas our research group has studied low-temperature co-fired ceramic (LTCC)-based DC-DC converter to achieve efficiency improvement and size reduction [5][6][7]. The first LTCCbased converter is the 120 W-class 48-to-12 V converter and it has a single-side structure where no other components exist on the lower side of the power inductor [5].…”

“…The first LTCCbased converter is the 120 W-class 48-to-12 V converter and it has a single-side structure where no other components exist on the lower side of the power inductor [5]. The 40 W-class 5/12 V dual output converter with small size, high efficiency and high reliability has been reported, but it also has a single-side structure [6]. The 35 W-class 12-to-5 V converter with a double-side structure where other components exist in the lower side of the power inductor has been reported [7].…”