A study of novel flyback converter with very low power consumption at the standby operating mode

Kim, Eun-Soo; Chung, Bong-Gun; Jang, Sang-Ho; Choi, Mun-Gi; Kye, Moon-Ho

doi:10.1109/apec.2010.5433482

Cited by 7 publications

(6 citation statements)

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“…It should be noted that the losses of the standby flyback converter always exist regardless of operating mode. Therefore, the standby converter degrades the total system's efficiency in entire load conditions [15][16][17][18][19][20]. Therefore, it is required to reduce the losses from the standby flyback converter.…”

Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

“…In this case, only a small output power is required to monitor the system status, so only the standby flyback converter with a small output power rating provides the standby output power. For the standby output, the flyback converter is widely used because of its small size and wide input-range capability [15][16][17][18]. Since Vout_STB should be regulated tightly, it is used for the feedback of the duty cycle of the standby converter.…”

Section: Introductionmentioning

confidence: 99%

“…The primary side and the secondary side of the server power system should be isolated. As shown in Figure 2, Vout_STB and V12P have different ground notation from each other [18]. In order to improve the light load efficiency, various techniques have been proposed by researchers [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…The primary side and the secondary side of the server power system should be isolated. As shown in Figure 2, V out_STB and V 12P have different ground notation from each other [18]. Figure 1a,b illustrates the standby mode and the normal mode of a server power supply.…”

Section: Introductionmentioning

confidence: 99%

“…For these reasons, standby-flyback-integrating structures have been studied in recent years [15][16][17][18][19][20]. By integrating the flyback converter into the main power conversion stage, these works reduced switching losses, resulting in the improved efficiency of the system.…”

Section: Introductionmentioning

confidence: 99%

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Standby-Loss Elimination in Server Power Supply

2017

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Abstract:In a server power system, a standby converter is required in order to provide the standby output, monitor the system's status, and communicate with the server power system. Since these functions are always required, losses from the standby converter are produced even though the system operates in normal mode. For these reasons, the losses deteriorate the total efficiency of the system. In this paper, a new structure is proposed to eliminate the losses from the standby converter of a server power supply. The key feature of the proposed structure is that the main direct current (DC)/DC converter substitutes all of the output power of the standby converter, and the standby converter is turned off in normal mode. With the proposed structure, the losses from the standby converter can be eliminated in normal mode, and this leads to a higher efficiency in overall load conditions. Although the structure has been proposed in the previous work, very important issues such as a steady state analysis, the transient responses, and how to control the standby converter are not discussed. This paper presents these issues further. The feasibility of the proposed structure has been verified with 400 V link voltage, 12 V/62.5 A main output, and a 12 V/2.1 A standby output server power system.

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Section: The Proposed Structure and Its Control Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The primary side and the secondary side of the server power system should be isolated. As shown in Figure 2, V out_STB and V 12P have different ground notation from each other [18]. Figure 1a,b illustrates the standby mode and the normal mode of a server power supply.…”

Section: Introductionmentioning

confidence: 99%