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[原创] Infineon TLD5541 - 2QV双路汽车照明解决方案

关键词:电源管理 LED驱动器 汽车照明 DC/DC转换器

时间:2018-06-08 09:29:29       作者:Infineon       来源:中电网

Infineon公司的TLD5541-2QV是内置了保护特性和SPI接口的同步双路DC/DC控制器,提供模拟和数字(PWM)调光特性,开关频率在200kHz到700kHz,可以和外接时钟同步,LED正向电压2 V到55 V,IC电压4.5V-40V,电源电压4.5V-55V,SPI用来诊断和控制,各种条件下的最大效率高达96%,多种拓扑恒流(LED)和恒压调整.主要用在汽车中大功率LED驱动设计,汽车外照明如LED头灯,通用电流/电压控制DC/DC LED驱动器.本文介绍了TLD5541-2QV主要特性和产品指标,保护功能与诊断特性,框图和多种应用电路及相应材料清单,以及评估板TLD5541-2QV DEMO V1主要指标,电路图,材料清单和PCB元件布局图.

The TLD5541-2QV is a synchronous DUAL Channel DC/DC controller with built in protection features and SPIinterface. This concept is beneficial for driving high power LEDs with maximum system efficiency andminimum number of external components. The TLD5541-2QV offers both analog and digital (PWM)dimming.The switching frequency is adjustable in the range of 200 kHz to 700 kHz. It can be synchronized to an external clock source. A built in programable Spread Spectrum switching frequency modulation and theforced continuous current regulation mode improve the overall EMC behavior. Furthermore the current moderegulation scheme provides a stable regulation loop maintained by small external compensationcomponents. The adjustable soft start feature limits the current peak as well as voltage overshoot at start-up.The TLD5541-2QV is suitable for use in th..

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