Infineon TLD5099EP多拓扑LITIX功率DC－DC转换器控制方案

Infineon公司的TLD5099EP是多拓扑LITIX™功率DC/DC控制器集成电路,灵活使用的确升压控制器,内置了诊断和保护特性,特别适合用来设计驱动LED.它包括脉宽调制器,很容易实现调光功能和降低色彩偏移,它的广谱调制器改善了EMI性能.器件在多种拓扑如升压,降压-升压,SEPIC和反激中支持固定电流和固定电压配置.TLD5099EP以内部5V线性稳压器来驱动低边N沟功率MOSFET.开关频率在100kHz到500kHz间可调,并和外部时钟源同步.输入电压范围从4.5V到45V,模拟调光和PWM调光,调整LED平均电流.主要用在汽车外部和内部照明,通用照明以及通用电流/电压控制DC/DC驱动器.中电网为您整理如下详细资料,本文介绍了TLD5099EP主要特性,框图和开关稳压器框图,多种应用电路,以及大功率LED应用评估板主要特性,电路图,材料清单和PCB设计图.
The TLD5099EP is a flexibly usable DC/DC boost controller with built in diagnosis and protection features especially designed to drive LEDs. It also includes a pulse width modulator to easily implement a dimming function with reduced color shifting and a spread spectrum modulator to improve the EMI performance.
It is designed to support fixed current and fixed voltage configurations in multiple topologies such as Boost, Buck, Buck-Boost, SEPIC and Flyback by simply adjusting the external components. The TLD5099EP drives a low side n-channel power MOSFET from an internal 5 V linear regulator.
The switching frequency is adjustable in the range of 100 kHz to 500 kHz and can also be synchronized to an external clock source. A spread spectrum modulator can be activated to improve the EMI, by moving the energy of narrow harmonics peaks over a broadband spectrum.
The TLD5099EP can be flexibly dimmed by means of analog and/or PWM dimming. The enable function reduces the shut-down current consumption to IQ_OFF < 15 μA at 105℃.The current mode control scheme of this device provides a stable regulation loop maintained by small external compensation components.Additionally an integrated soft start feature limits the current peak as well as voltage overshoot ...