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