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[原创]Infineon TLD5542-1带SPI接口的H桥DC-DC转换器解决方案

关键词:电源管理 DC/DC转换器 LED驱动器 Infineon TLD5542-1

时间:2020-08-11 15:24:30       来源:中电网

Infineon公司的TLD5542-1是内置了保护特性和SPI接口的同步MOSFET H桥DC/DC转换器,具有能以最大系统效率和最少外接元件来驱动大功率LED的优势. TLD5542-1提供模拟和数字(PWM)调光.开关频率在200kHz到700kHz可调,并和外部时钟源同步.内置的可编扩展频谱开关频率调制器和强迫连续电流调整模式改善了整个EMC性能.此外,电流模式调整方案提供由小型外接补偿元件所维持的稳定调节回路.可调软起动特性限制了起动时电流峰值和电压过冲值. TLD5542-1是单电感大功率降压-升压控制器,LED正向电压从2V到高达55V,SPI接口用于诊断和控制,每种条件的最大效率高达96%.器件也适合用在苛刻的汽车环境.由于快速输出放电工作,用单个IC能驱动多个负载.LED电流的精度+/- 3%.对器件和负载都有先进的保护特性.主要用在驱车多个大功率LED的特别设计,汽油外部照明以及通用DC/DC电压稳压器.本文介绍了TLD5542-1主要特性,框图和多种应用框图, 评估板TLD5542-1IVREG-EVAL主要特性和电特性,电路图和PCB设计图.

 

The TLD5542-1 is a synchronous MOSFET H-Bridge DC/DC controller with built in protection features and SPI interface. This concept is beneficial for driving high power LEDs with maximum system efficiency and minimum number of external components. The TLD5542-1 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 the forced continuous current regulation mode improve the overall EMC behavior. Furthermore the current mode regulation sche..

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