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AN4027 데이터시트(PDF) 1 Page - STMicroelectronics |
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AN4027 데이터시트(HTML) 1 Page - STMicroelectronics |
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1 / 41 page ![]() April 2014 DocID022604 Rev 3 1/41 AN4027 Application note 12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6699 and SRK2000A Claudio Spini Introduction This application note describes the EVL6699-150W-SR demonstration board features, a 12 V - 150 W converter tailored to a typical specification of an all-in-one (AIO) computer power supply or a high power adapter. The architecture is based on a two-stage approach: a front-end PFC pre-regulator based on the L6563H TM PFC controller and a downstream LLC resonant half bridge converter using the new L6699 resonant controller. The L6699 device integrates some very innovative functions such as self-adjusting adaptive deadtime, anti-capacitive mode protection and proprietary “safe-start” procedure preventing hard switching at startup. Thanks to the chipset used, the main features of this power supply are very high efficiency, compliant with ENERGY STAR® eligibility criteria for adapters (ENERGY STAR® rev. 2.0 for external power supplies) and with the latest ENERGY STAR® qualification criteria for computers (ENERGY STAR® ver. 6.0 for computers). The power supply also has very good efficiency at light load too and no load input power consumption is very low as well, making the board compliant with the requirements of the latest European Code of Conduct (CoC) Tier 2 and EuP Lot 6 Tier 2. Figure 1. EVL6699-150W-SR: 150 W SMPS demonstration board www.st.com |
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