Steadystate models of the high power llc resonant network were researched. The design and implementation of llc resonant halfbridge. Resonant dcdc converters and their design considerations, along with a design process example, please refer to sem1900 topic 3, designing an llc resonant half bridge power converter by texas instruments. Highvoltage halfbridge llc resonant dcdc converter with. Offering everything necessary to build a reliable and robust resonant converter, the fan7621 simplifies designs and improves productivity, while improving performance. An introduction to llc resonant half bridge converter introduction although in existence for many years, only recently has the llc resonant converter, in particular in its half bridge implementation, gained in the popularity it certainly deserves. The llc resonant topology allows for zero voltage switching of the main switches thereby dramatically lowering switching losses and boosting efficiency. The llc resonant converter operates with high power density and high frequency range up to several mhz 12 as it combines the frequencies of src and prc. Applying synchronous rectification in resonant halfbridge. This example circuit uses scripting to determine the minimum magnetics ratio of magnetizing resonant, ln lmlr, to provide the desired gain and output power of an llc resonant converter. Resonant llc halfbridge dcdc converter software design guide. Llc converter topology overview the llc resonant converter is an attractive alternative to the traditional half bridge hb topology for several reasons. Infineon ice2hs01g is a high performance resonant mode controller designed especially for high efficiency halfbridge or fullbridge llc resonant converter.
The remaining steps are different, because there is no dutycycle factor in a resonant converter. The llc converter is a resonant inverter with 3 reactive elements where dc input voltage is turned into a. Half bridge llc resonant converter design using ice1hs01g. Design considerations for a half bridge llc resonant. Drm119, llc resonant acdc switchedmode power supply. A clever voltagefed halfbridge converter architecture. An introduction to llc resonant halfbridge converter introduction although in existence for many years, only recently has the llc resonant converter, in particular in its halfbridge implementation, gained in the popularity it certainly deserves. The llc converter is a resonant inverter with 3 reactive elements where dc input voltage is turned into a square wave by a switch network arranged as either a half or fullbridge. Resonant llc half bridge dcdc converter software design guide. Refer to figure 3 for placement of each macro block. Mar 31, 2012 design and implementation of llc resonant half bridge converter abstract. Resonant llc halfbridge dcdc converter hardware design guide. This guide will not repeat the discussion of those details found in.
It feeds the resonant llc tank that filters out harmonics providing a sinusoidal like voltage and current waveform. The most popular member of three part tanks is the llc resonant converter. Highfrequency llc resonant converter with gan devices and. The high power half bridge llc converter was modeled and analyzed with first harmonic approach so as to obtain the optimal parameters. The difference between full bridge fb and half bridge hb can be seen if the whole converter is modelled as a chain of source fb or hb, filter network resonant tank and magnetising inductance and rectifier. The evm accepts dc input voltage in the range 350v to 400v and delivers a regulated 12v dc output, in the range from zero load to 340w power. The squarewave voltage v g is generated by a half bridge consisting of transistors q1 and q2. The resonant llc power topology is valued for its inherently high levels of efficiency credited to high frequency, low loss resonant switching. Basic principles of llc resonant half bridge converter and dcdynamic circuit simulation examples introduction llc resonant half bridge converters are widely used in consumer electronics, like powering the display panel of lcd tv. Results are obtained for llc resonant converter using psim simulation software.
The proposed converter achieved a constant voltage and current, which were required to drive high brightness led lamps. Their suitability to high frequency usage and capacity to. Related resources an4151 halfbridge llc resonant converter design using fsfrseries fairchild power switch fpstm ordering information part number operating junction temperature. The maximum whole system efficiency is above 88%, meets current industry specification of 85%. Performance analysis of pulse analog control schemes for llc. The resonant tank consists of two inductors lr, lm and one capacitor cr see figure 1. An introduction to llc resonant halfbridge converter. Pdf digital control of a halfbridge llc resonant converter. An9729 led application design guide using halfbridge. The switching circuit in the reference design uses a half bridge topology, so the half bridge voltage swings between 0v and vd 400 vdc nominal. Pdf design of half bridge llc resonant converter using. Doing milspec documentation is a great way to learn the right way to document your designs. This paper presents and discusses a novel half bridge dcdc resonant converter with digital control and fuzzy logic. The parallel inductor can be replaced by using the magnetizing inductance when using a transformer 14.
Llc resonant topology lowers switching losses, boosts. The ucd38llcevm028 evaluation module evm is a digitally controlled halfbridge resonant llc converter based on the ucd38 programmable digital power controller. And9408 basic principles of llc resonant half bridge converter. An important thing to note about this resonant converter is that any differences in the tank circuits of the two phases lead to unequal sharing of. Resonant half bridge converters provide a costeffective and efficient solution for offline power supplies in the range of 200 w to 500 w. Jun 27, 2019 the dcdc llc resonant converter reference design utilizes microchips digital power conversion dspic for unique adaptive control of the halfbridge converter and synchronous rectifier. Resonant llc halfbridge dcdc converter software design. The principle schematic of a half bridge llc converter is shown in. Converter gain switching bridge gainresonant tank gain transformer turn ratio nsnp where the switching bridge gain is1for a fullbridge and 0. Greater design flexibility designer can setup any l s and l m value. In order to achieve this goal, a novel half bridge llc resonant current doubler dcdc converter topology has been designed, simulated, and evaluated in this project. Another researcher in suggested an llc series resonant converter based led driver with pfc boost converter which was operated in ccm, and a quasihalf bridge resonant converter that worked under zvs to reduce switching losses. Jan 25, 2017 design consideration of half bridge llc resonant converter, journal of power electronics, 71. Design considerations for a half bridge llc resonant converter.
In order to achieve this goal, a novel halfbridge llc resonant current doubler dcdc converter topology has been designed, simulated, and evaluated in this project. Digitally controlled interleaved llc resonant converter. Efficiencies of 93 to 96% can be achieved with llc resonant converters. This topology is also known as an llc converter, with the name derived from the fact that the resonant tank comprises two inductors and one capacitor. The switching circuit in the reference design uses a halfbridge topology, so the halfbridge voltage swings between 0v and vd 400 vdc nominal. Llc resonant converters increase efficiency in dctodc applications. Designing an llc resonant halfbridge power converter article.
The fan7621 is a pulse frequency modulation controller for highefficiency half bridge resonant converters. Design and analysis of llc resonant converter for pv. A simple design and simulation of full bridge llc resonant dc. The main challenge in the technical side of this project is to focus on the benefits of using the current doubler converter. Design consideration of halfbridge llc resonant converter. The converter consists of a switching bridge half bridge mosfet, an llc resonant circuit, a full bridge rectifier and an output filter co. Design of half bridge llc resonant converter for low voltage dc applications doi. Microchips 200w dcdc llc resonant converter reference design. Design of half bridge llc resonant converter for low. However, designing such converters presents many challenges.
Duerbaum friedrichalexanderuniversitat erlangennuremberg cauerstra. The dcdc llc resonant converter reference design utilizes microchips digital power conversion dspic for unique adaptive control of the halfbridge converter and synchronous rectifier. The converter consists of a switching bridge halfbridge mosfet, an llc resonant circuit, a fullbridge rectifier and an output filter co. Highfrequency llc resonant converter with gan devices. Three advantages are achieved with this resonant converter. Drm119, llc resonant acdc switchedmode power supply using. This guide covers how to run and get familiar with the highvoltage halfbridge llc resonant dcdc. A simple design and simulation of full bridge llc resonant. Another researcher in suggested an llc series resonant converter based led driver with pfc boost converter which was operated in ccm, and a quasi half bridge resonant converter that worked under zvs to reduce switching losses. Converter with synchronous rectification kits hvllc project. Though it operates at high frequency the switching losses are reduced and provide high efficient llc converter design 1. Since the natural interleaving pfc can raise the power levels and minimize the size of energy storage inductor, it is suitable for the. We developed multiagent programs that can check interference, lack of cover and space of members such as reinforcing bars, prestressing. Design considerations for a halfbridge llc resonant converter.
Llc resonant converter in the rtn comprises three reactive elements, whereby it is appraised as a conventional src and addition of inductor l r equidistant to the load that is referred to as parallel inductor l rp. Resonant llc halfbridge dcdc converter hardware design. Designing a mediumpower resonant llc converter using the ncp95. The llc converter is a resonant inverter with 3 reactive elements where dc input voltage is turned into a square wave by a switch network arranged as either a half or full bridge. Tidmresllcdcdc resonant llc halfbridge dcdc converter. Fan7621 pfm controller for halfbridge resonant converters. This thesis focuses on the analysis and design of the llc resonant halfbridge converter with natural interleaving power factor correction circuit. Recently, dcdc resonant converters have received much research interest as a result of the advancements in their applications. Llc resonant converter half bridge circuit diagram. Infineon ice2hs01g is a high performance resonant mode controller designed especially for high efficiency half bridge or full bridge llc resonant converter with synchronous rectification at the secondary side. Llc resonant converter and fundamental approximation figure 3 shows a simplified schematic of a halfbridge llc resonant converter, where lm is the magnetizing inductance that acts as a shunt inductor, lr is the series resonant inductor, and cr is the resonant capacitor.
Design and analysis of llc resonant converter for pv energy. Mode i t0 half bridge llc vs full bridge llc converter. Performance analysis of pulse analog control schemes for. The high power halfbridge llc converter was modeled and analyzed with first harmonic approach so as to obtain the optimal parameters. Design and implementation of llc resonant half bridge converter abstract. At first, the characteristics of the natural interleaving power factor correction will be analyzed. Llc resonant converter topology other than the two part resonant tanks, there are almost 40 possibilities of three part resonant tanks. The llc resonant circuit reduces switching loss through zerovoltage switching zvs. Design of half bridge llc resonant converter for low voltage. However, the operating principles of a llc resonant half bridge converter are far from apparent and intuitive 1. Design of a 600 w hb llc converter using 600 v coolmos p6. Schematic and basic waveforms for hb llc converter operating at resonant frequency. To design the llc resonant halfbridge converter, we use the first harmonic approximation fha.
This application note describes how to design half bridge llc resonant converter using ice1hs01g, which is an 8pin llc controller developed by infineon technologies. Design and experimental evaluation of a singlestage acdc. Llc resonant halfbridge converter similar to the design process for pwm converters, the first step when designing an llcsrc is to select the desired operation frequency at full load. Unlike the slr converter, the llc converter can keep the output voltage regulated even under light load condition. Llc resonant converters increase efficiency in dctodc. Resonant lcc converter for lowprofile applications a. Llc resonant converter is proposed for front end dcdc conversion application. For an indepth discussion of llc resonant dcdc converters and their design considerations, along with a design process example, please refer to sem1900 topic 3, designing an llc resonant halfbridge power converter by texas instruments.
This increase in their industrial application has given rise to more efforts in enhancing the softswitching, smooth waveforms, highpower density, and high efficiency features of the resonant converters. A closedloop control of high power llc resonant converter for dcdc applications, nirma university international conference, pp. The resonant tank circuit is made up of a capacitor, an inductor, and the magnetizing inductance of the isolating transformer. High efficiency and high power density 1kw resonant. This design is a digitally controlled 300w resonant llc halfbridge dcdc converter with added synchronous rectification. This chapter describes the software design of llc resonant converter using 56f83783. An4151 halfbridge llc resonant converter design using fsfr. Isolated drivers for primary side half bridge are implemented by pulse. Design and implementation of llc resonant half bridge. Ice1hs01g is specially designed for applications of switch mode power supplies used in lcd pdp tv, acdc adapter and audio system.
After finding the turns ratio, the final resonant network parameter values were designed and tabulated in table 2 on referring to the design procedures given in yang et al. Dec 08, 2011 the efficiency of the front stage natural interleaved power factor correction circuit can reach 95%, and the maximum efficiency of the rear stage llc resonant half bridge converter is 93%. Digital control of llc resonant based dcdc conver youtube. The topologies commonly used in the highvoltage end of the llc resonant converter are the half bridge and full. The squarewave voltage v g is generated by a halfbridge consisting of transistors q1 and q2. Design and implementation of llc resonant half bridge converter. Llc resonant converter 12v600w prd1486 topology and circuit description this application note consists of adp1046athe in an isolated dcdc switching power supply that is llc resonant topology with synchronous rectification the circuit is designed to provide a rate. Converter gain switching bridge gain resonant tank gain transformer turn ratio nsnp where the switching bridge gain is1for a full bridge and 0. This reference design is implemented using a single dspic33ep dspic33fj gs digitalpower dscs from microchip that provides the full digital. Operation and design 4 application note an 201209 v1. This reference design is a high efficiency, high power density and light weight resonant converter reference design. And9408 basic principles of llc resonant half bridge.
Additionally, selecting an appropriate llc resonant converter architecture can further optimize the e ciency and reduce component stress 911. The fan7621 is a pulse frequency modulation controller for highefficiency halfbridge resonant converters. The fan7621 can be applied to various resonant converter topologies. Llc resonant converter waveforms at resonant frequency the typical waveforms of the llc resonant converter are shown in figure 6. Design consideration of half bridge llc resonant converter, journal of power electronics, 71. The resonant tank consists of two inductors lr, lm and one capacitor cr see figure 14. The pmp20637 power stage has over 140win3 power density. Use fundamental approximation and ac simulation in any simulation software like pspice, icap4 etc r ac is the parameter.
The development of resonant converters with zero voltage. Switching takes place under conditions of zero drain voltage. Fairchild semiconductor, an4151, half bridge llc resonant converter design using fsfrseries fairchild power switch tags analog ics power semiconductors smart energy 0 comments on llc resonant topology lowers switching losses, boosts efficiency. Application note an1160 design of resonant halfbridge. Modeling and design of high power halfbridge llc resonant. Converter with synchronous rectification kits hvllc.
Here is the two phase interleaved half bridge llc resonant converter block diagram that was presented in an earlier slide. The performance advantages of an llc resonant converter make this design approach an excellent choice for increased energy. The resonant inductance, resonant capacitance and excitation inductance were designed. Llc resonant converter using mc56f83783 nxp semiconductors.
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