National Semiconductor added the "WEBENCH LED Architect" tool for LED driver circuits to the company's online design support tool "WEBENCH". This is a free tool to support LED lighting design . It can be used to design LED lighting with a luminous flux of up to 100,000 lm (lumen). Simply input the input voltage range, ambient temperature, required luminous flux and illuminating color to query the pre-recorded data and analyze it to optimize the LED, LED driver IC and heat sink. In addition, the parameter adjustment function "Optimizer Dial" is provided, which can change the weighting coefficient of the package area, component (BOM) cost and conversion efficiency of the drive circuit to perform query analysis again. The analysis results obtained can be output in the form of reports including circuit diagrams, BOM (BOM) lists, and simulation results of performance. Online design support tool for LED driver circuits for lighting applications The data entered in advance are as follows. The LEDs are 350 products of 12 companies including Cree, Osram Opto Semiconductor and Sharp in Germany. The heat sink is 30 products and the LED driver IC is 35 products. All LED driver ICs are products of National Semiconductor. Specifically, the IC "LM3464" capable of driving LEDs with high efficiency by using LDO adjustment circuit, the "LM3409HV" for vehicle-mounted LED driver IC according to the quality standard "AEC-Q100", and the thermal control function are provided by the dynamic headroom control function. LED driver IC "LM3424" and so on.
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