Infineon TLD5542－1同步MOSFET H桥DC/DC控制器解决方案

Infineon公司的TLD5542-1是同步MOSFET H桥DC/DC控制器,内置了保护特性和SPI接口,能以最大的系统效率和最少的外接元件驱动大功率LED. TLD5542-1提供模拟和数字(PWM)调光,开关频率在200kHz和700kHz间可调.器件可与外接时钟源同步.内置的可编扩频开关频率调制和强迫连续电流稳流模式改善了整个EMC性能. 电流模式稳流方案提供了由少数补偿元件所维持的稳定调整回路,而可调软起动特性限制了在起动时所产生的电流峰值和电压过冲值.宽LED正向电压范围为2V到55V,宽VIN范围(IC为4.5V到40V,电源为4.5V到55V),每个条件下的最高效率高达96%.LED电流精确度为+/- 3%.器件满足汽车AEC规范.采用小型热增强特性的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,框图和几种应用电路和相应材料清单,以及评估板TLD5542-1HIPOW_EVAL主要特性,电路图,材料清单和PCB设计图.

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 externalclock source. A built in programable Spread Spectrum switching frequency modulation 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.

TLD5542-1主要特性:

• Single inductor high power Buck-Boost controller

• Wide LED forward voltage range (2 V up to 55 V)

• Wide VIN range (IC 4.5 V to 40 V, power 4.5 V to 55 V)

• Switching frequency range from 200 kHz to 700 kHz

• SPI for diagnostics and control

• M...