As the government's mandatory ban on incandescent lamps has been strictly enforced, the LED lighting market continues to grow, but there are still many challenges in finding effective ways to design power systems to achieve LED miniaturization. Design complexity, such as two-way thyristor dimming control, addressing power line regulations around the world, reducing costs, increasing efficiency, and supporting a wider range of output powers. Fairchild recently successfully announced the FL7733A and FL7734 primary-side regulation (PSR) LED driver products and 800 V SuperFET® II MOSFETs.
LED lighting design engineers still face a small challenge – putting all the components together to form an effective power electronics system, as shown in Figure 1. With these engineers in mind, Fairchild has enhanced Power Supply WebDesignerTM online design and simulation tools, including high-performance PSR flyback/Buck-Boost LED drivers for both non-dimming and tangent dimming applications.
Figure 1: 10 W – 100 W LED Power System with Buck-Boost Topology
Based on the specific design requirements of these engineers, the Power Supply WebDesigner tool can quickly and accurately evaluate design performance and improve design. These tools also allow users to perform detailed simulation analysis (Figure 2) and gain insights into how their design and hardware samples can work with greater confidence, all in minutes. If there is other collaboration, the user can save their design for future reference or easily share their design with other engineers for review.
Figure 2: Power System Simulation
The Power Supply WebDesigner tool provides novice designers with a quick, guided design experience while allowing experienced designers to further customize key design factors. This tool provides all recommended power system components including Fairchild's 800 V SuperFET II MOSFET, LED driver IC and rectifier bridge and schematic. Designers can predict critical system power factor and THD results by allowing tools to directly recommend or fine tune inductor and EMI filter designs. By being able to visualize the main component power and system efficiency under different line and load conditions (Figure 3), experienced designers can optimize component selection to improve efficiency by design.
Figure 3: Detailed loss analysis for different line voltage and load conditions
The Power Supply WebDesigner design tool provides a complete set of time-saving LED driver design tools for designing and optimizing LED drivers. The range of experience offered by these online tools, from device to system analysis and simulation, is done in minutes. Whether you're rich in experience or not, these tools improve efficiency, efficiency, and reliability when designing even the most challenging triac dimming LED drivers.
Application-Specific Integrated Circuit refers to an integrated circuit specifically designed to perform a specific computing task. It is very common to use ASIC for mining in the field of blockchain. This article will analyze the principle of ASIC mining and why it should be anti-ASIC.
For Bitcoin, mining has gone through four stages: CPU, GPU, FPGA and ASIC. GPU is naturally suitable for parallel simple operations, so the execution of SHA256 is much higher than the CPU. FPGA is a programmable hardware, because it has a certain degree of universality, so the unit price will be relatively expensive. ASIC has a large initial design investment, but the unit price will be cheaper after mass production. Therefore, if you can determine that the market size is relatively large, the use of ASIC technology will be the most cost-effective.
This is the basic principle of ASIC.
In a nutshell, mining is running complicated calculations in the search for a specific number. Whether it`s an ASIC miner or a GPU mining rig, mining hardware must run through many calculations before finding that number. In proof of work systems like Bitcoin, the first one to find that number gets a reward - at the time of writing, 12.5 Bitcoins worth around $96,850. That reward will fall to 6.25 Bitcoins in May 2020.
There are so many people and powerful computing systems trying to mine Bitcoin that miner groups form to find that number and share the profit. Even more, the faster your hardware, the more you earn. That`s why people who can afford it opt for ASIC miners because it gives them the greatest chance of earning cryptocurrency in exchange for their investment.
Each cryptocurrency has its own cryptographic hash algorithm, and ASIC miners are designed to mine using that specific algorithm. Bitcoin ASIC miners are actually designed to calculate the SHA-256 hash algorithm. In the case of Litecoin, it uses Scrypt. That means technically they could mine any other coin that`s based on the same algorithm, though typically, people who buy ASIC hardware designed for Bitcoin mine that specific digital currency.
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