Infineon TLD5542-1 H桥DC/DC控制器解决方案

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控制器.这种概念有助驱动大功率LED,具有最大的系统效率和最低数量的外接元件.器件提供模拟和数字(PWM)两种调光.开关频率在200kHz和700kHz间可调整,并能和外部时钟源同步.内置的可编扩频开关频率调制和强迫连续电流调整模式改善了整个EMC性能.此外,有少数外接补偿元件所维持的电流模式稳定方案提供稳定的调整回路.可调软起动特性限制电流峰值和起动时电压过冲值.LED电流精度+/-3%.每种条件下效率高达96%.具有汽车AEC质量认证.采用小型热增强的PG-VQFN-48 或PG-TQFP-48封装.主要用在环境苛刻的汽车电子.本文介绍了TLD5542-1主要特性和框图,产品性能和电流稳流器应用电路,稳压器应用电路,跛行模式状态电路图,改善EMC性能应用电路图以及3功能LED驱动器模块用电路图,以及屏障板TLD5542-1CHG_SHIELD主要特性,电路图,材料清单和PCB装配图.

The TLD5542-1 is a synchronous MOSFET H-Bridge 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 TLD5542-1 offers both analog and digital (PWM) dimming.Theswitching frequency

is adjustable in the range of 200 kHz to 700 kHz. It can be synchronized to an external

clock source. A built in programmable Spread Spectrum switching frequencymodulation and the forcedcontinuous 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 TLD5542-1 is suitable for use in the harsh automotive environment.