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Showing 1 to 15 of 15 for “"synchronous rectifier"”.
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High Voltage Synchronous Rectifier Design Considerations
… during this high voltage transition is the synchronous rectifier, which is traditionally designed as an afterthought. Prior research in synchronous rectifiers have been limited to low voltage, high current converters. There is practically no research in high voltage synchronous …
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Experimental investigation of semiconductor losses in cryogenic DC-DC converters
… down to 20 K. In particular hard switching, synchronous rectifier, zero-voltageswitching and multi-level circuit prototypes are examined, focusing on the losses in the semiconductor devices. The prototypes operated from 120 V and 500 V DC supplies at power levels up to 500 W using MOSFET …
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Investigation of Topology and Integration for Multi-Element Resonant Converters
… design, start-up, short-circuit protection, synchronous rectifier drive, EMI noise and integration, etc. To solve those issues, like start-up and short-circuit protection, SR driving and EMI, etc., a synthesis method is proposed to find the similar resonant topologies like LLC. Based on this …
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A modified asymmetrical pulse-width modulated series resonant DC/DC converter
… improve the performance, the use of MOSFETs as synchronous rectifiers in place of diode rectifiers is proposed. Two examples of synchronous rectifier topologies that are applicable to the converter under study are investigated. Computer simulation shows the feasibility of employing synchronous …
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High Frequency, High Current Density Voltage Regulators
… of the input capacitor of the secondary- side synchronous rectifier (SR) as the snubber capacitor of the primary-side switches. Compared to the external driver, the proposed converter can save driving loss and synchronous rectifier body diode conduction loss. Additionally, compared to the …
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Single-Stage Wireless Power Transfer System with Single-Switch Secondary Side Modulation
… the duty cycle of the secondary side synchronous rectifier (SR) switch is modulated to control the output voltage or current. By modulating the SR duty cycle, output of the WPT system can be controlled without requiring additional regulator stages/power devices, a primary side sensing …
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Design and Implementation of a Radiation Hardened GaN Based Isolated DC-DC Converter for Space Applications
… Full Bridge DC-DC Isolated converter with synchronous rectification for space applications. Recently released radiation hardened GaN FETs were used in the Full Bridge and synchronous rectifier power stages. A survey outlining the benefits of new radiation hardened GaN FETs for space power …
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MOSFET Current Source Gate Drivers and Topologies for High Efficiency and High Frequency Voltage Regulator Modules
… contribution is a new continuous CSD for a synchronous buck converter. The proposed CSD is able to drive the control and Synchronous Rectifier (SR) MOSFETs independently with different drive currents enabling optimal design. At 12V input, 1.5 V/30A output and 1MHz, the proposed CSD improves …
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Control And Topology Improvements In Half-bridge Dc-dc Converters
… Driving voltage variation on the secondary side Synchronous Rectifier (SR) MOSFETs in self-driven circuit due to input voltage variation in bus converter applications is also investigated. One solution with a variety of derivations is proposed using zerner-capacitor combination to clamping the …
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Topology Investigation and System Optimization of Resonant Converters
… (ZCS) for the secondary side rectifiers. The switching loss is minimized. LLC is very attractive to overcome the issues of conventional circuits. However, challenges still remain. First of all, for low-voltage high-current applications, the synchronous rectifier (SR) with lower …
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Design of low-voltage, high-bandwidth radio frequency power converters
… for low-voltage power conversion and employs synchronous rectification to improve efficiency. The converter is also comprised of a high-bandwidth and high-switching-frequency inverter topology that can dynamically adjust the output power from one-quarter to full power, while maintaining good …
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State-Trajectory Analysis and Control of LLC Resonant Converters
… switching frequency. Thus the driving of the synchronous rectifier (SR) poses a design challenge as well. To analyze the fast dynamic characteristic, a graphic state-plane technique has been adopted for a class of resonant converters. In this work, it has been extended to the LLC resonant …
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Topology investigation of front end DC/DC converter for distributed power system
… improved with these methods. To reduce secondary rectifier conduction loss, QSW synchronous rectifier is developed, which also helps to achieve ZVS for symmetrical half bridge converter. Although with these methods, the efficiency of front end DC/DC converter could be improved, the excessive …
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High Efficiency Optimization of LLC Resonant Converter for Wide Load Range
… efficiency of LLC resonant converter with diode rectifier still cannot meet the recent efficiency target from industry. In order to further improve efficiency of LLC resonant converters, synchronous rectification must be used. The complete solution of synchronous rectification of LLC resonant …
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Design and Integration Techniques for High-Frequency PCB-Based Magnetics in Resonant Converters
… to reduce the termination loss of the secondary synchronous rectifier and achieve better thermal management. The number of secondary turns is optimized to achieve the best trade-off between winding loss, core loss, and power density. Another challenge arises for magnetic integration when multiple …