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LED应用中芯片的技术发展

Date: 2019-08-06
Views: 19

      LED照明灯具的驱动电源对变压器、电感器参数的要求十分高,为求精准需花费大量的人力和财力才能实现,工业化生产成本很难进一步下降。

      对LED驱动恒流源芯片设计技术的创新和突破,新的解决方案可以在LED灯具驱动电源实际应用时,输出电流对变压器和电感的电感量和LED的VF等参数不太敏感。创新技术的关键是优化芯片算法语言。芯片控制输出电流峰值,并通过辅助绕组反馈,使得退磁时间和芯片开关周期的比例固定,这样就可以使得输出电流与外围的电感量偏差和输出电压的偏差无关,而LED的VF值的偏差和电感偏差正是批量生产面临的最大的问题。

      来说,批量生产的变压器电感量和LED的VF都会有5~10%左右的偏差。而LED照明恒流驱动电源,批量精度可达3%以内,可以容许变压器和电感参数有较大的允差,这就降低了规模工业化生产的成本并促进流水线的持续快速生产

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2019 - 08 - 06
1.IntroductionArduino Due is an open source development board with 32-bit ARM core. Its pins are fully compatible with Arduino Mega2560. Atmel's ATSAM3X8E is used in the chip. Atmel preburns bootloader into ROM when it manufactures the chip. Arduino Due has 54 digital IO ports (12 can be used for PWM output), 12 analog input ports, 4 UART hardware serial ports, 84 MHz clock frequency, one USB ...
2019 - 08 - 06
At present, it is found that Arduino version 1.8.5 or more needs to be set up when downloading programs.Next, take Arduino 1.8.5/Arduino 1.8.8/arduino 1.8.9 and Arduino 1.8.9 as examples.The development board connects the computer through the USB cable and checks the port number in the device manager. As shown in the figure.I. Take Arduino 1.8.5 as an exampleOpen the Arduino software and set up th...
2019 - 08 - 06
Prepare software:ST Visual Programmer1. Read Protection Settings:Click on Option byteClick on the ROP option and select Read Out Protection ONAfter the above changes, the chip can no longer be read!When burning HEX files, there will be read protection prompts.The tips are as follows: Read Out Protection ON in read protection stateThis operation is equivalent to the first level protection, and can ...
2019 - 08 - 06
LED照明灯具的驱动电源对变压器、电感器参数的要求十分高,为求精准需花费大量的人力和财力才能实现,工业化生产成本很难进一步下降。对LED驱动恒流源芯片设计技术的创新和突破,新的解决方案可以在LED灯具驱动电源实际应用时,输出电流对变压器和电感的电感量和LED的VF等参数不太敏感。创新技术的关键是优化芯片算法语言。芯片控制输出电流峰值,并通过辅助绕组反馈,使得退磁时间和芯片开关周期的比例固定,这样就可以使得输出电流与外围的电感量偏差和输出电压的偏差无关,而LED的VF值的偏差和电感偏差正是批量生产面临的最大的问题。来说,批量生产的变压器电感量和LED的VF都会有5~10%左右的偏差。而LED照明恒流驱动电源,批量精度可达3%以内,可以容许变压器和电感参数有较大的允差,这就降低了规模工业化生产的成本并促进流水线的持续快速生产
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