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

摘要: 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,特别适合于驱动具有最大系统效率和最少外接元件的大功率LED. TLD5542-1是单电感大功率降压-升压控制器,提供模拟和数字(PWM)调光,开关频率在200 kHz 到700 kHz间可调.LED正向电压在2V-55V),VIN电压范围宽(IC 4.5V-40V,电源4.5V-55V),每种条件下的效率高达96%. TLD5542-1具有恒流(LED)和恒压稳压器.由于快速输出放电操作,单个IC可驱动多个负载.LED和输入电流检测有专用的监测器输出,用于器件和负载的先进的保护特性. LED电流精度在+/- 3%.主要用在驱动多个大功率LED功能的特别设计,汽车外部照明,通用DC/DC电压稳压器.本文介绍了TLD5542-1主要特性,保护功能和诊断功能以及跛行模式功能,框图和稳压器框图,应用框图,以及TLD5542-1多路评估板V4.4主要电特性,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 scheme provides a stable regulation loop maintained by small external compensation components. 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
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