This application note describes the LED driving system using a half-bridge LLC resonant converter for high power LED lighting applications, such as outdoor or street lighting. Due to the existence of the non-isolation DC-DC converter to control the LED current and the light intensity, the conventional PWM DC-DC converter has the problem of low-power conversion efficiency. The halfbridge LLC con...

This paper presents design of generalized resonant dc/dc converter with class E oscillator and a experimental result for low output Q and finite dc-feed inductance are shown. Low Q and finite dc-feed inductance is effective to minimize the circuit scale. Therefore, it is required to design the converter with any conditions, i.e., low output Q and finite dc-feed inductance. The experimental meas...

A new zero voltage switching (ZVS) dc / dc converter operating on constant frequency and having wide linearity is proposed. ZVS operations are achieved not only for the primary switches but also for the secondary rectifier diodes to reduce the switching stresses and losses. The proposed converter also overcomes the other shortcomings of the conventional resonant dc / dc converters such as high ...

Resonant switching DC-DC converters are currently replacing hard switched converters for power supply in many applications due to their divergent advantages such as high efficiency, high frequency operation, compact structure, low EMI, etc. The paper deals with the design and simulation of SISO ZVS Pushpull converter for R, RL, RLE and DC servo drive using MATLAB/ Simulink in half wave mode. Th...

This paper proposes an analytical approach to derive voltage gain for phase modulated (PM) dc-dc series resonant converter (SRC) operating in discontinuous conduction mode (DCM). Conventional fundamental harmonic approximation (FHA) technique is extended for non-ideal series resonant tank. The DCM analysis is presented in a normalized form defining appropriate base quantities. The converter is ...

Insertion of a dc-dc converter between the automobile battery and electrical loads is proposed. This would allow gradual conversion to higher battery voltage, regulation of dc distribution voltage, and multiple distribution voltage levels. Switching loss arising from parasitic inductances is a serious problem in this application. The nonlinear resonant switch can remove this source of loss, ach...

This document describes several aspects relating to the design of dc-dc converters operating at frequencies in the VHF range (30-300 MHz). Design considerations are treated in the context of a dc-dc converter operating at a switching frequency of 100 MHz. Gate drive, rectifier and control designs are explored in detail, and experimental measurements of the complete converter are presented that ...

This paper presents implementations of a nonisolated, high voltage gain DC-DC converter. High voltage gain is achieved due to inclusion of resonance and transformer in the circuit. The performance of this converter is compared with two similar topologies namely coupled inductor-switched capacitor step-up converter and coupled inductor step-up converter. The proposed prototype is designed using ...

This paper represents a modified LCL-T (inductor inductor capacitor) series parallel resonant converter (SPRC) has been mathematically modeled and validated. The limitations of two element resonant topologies have been removed by adding a third reactive element. The study indicates the mathematical modeling and design of LCL-T SPRC. The proposed approach is expected to provide better voltage re...