Infineon ICL8105+CDM10V 40W数字配置LED驱动方案
Infineon公司的ICL8105是集成了功率因素修正(PFC)的数字反激控制器,PF高达0.99,THD<10%,效率高达91%,支持通用输入电压(85V-305V AC),主要用在5 W到 80 W的LED照明.本文介绍了ICL8105产品亮点和主要特性,几种应用电路,以及40W参考设计REF-ICL8105-CDM10V主要特性和电指标,电路图,材料清单和PCB元件布局图.
The ICL8105 is a digital AC/DC flyback controller with Power Factor Correction (PFC). The PFC function enablesa rectified sinusoidal input current waveform with a power factor typically up to 0.99 and THD < 10% for a widerange of operating conditions. ICL8105 provides primary side constant output current control that avoids thesecondary side control feedback loop circuitry usually needed in isolated power converters. This approachsupports a low part count that is necessary to build up the application. ICL8105 has multi-mode operationsand it selects the best mode of operation based on operating conditions. The multi-mode operation willautomatically switch between quasi-resonant mode (QRM) and discontinuous mode (DCM) and active burstmode (ABM). In addition, ICL8105 supports both secondary side 0 - 10 V dimming and primary side microcontroller dimming application. Digital and RF interfaces can be supported by a microcontroller using adigital-to-analog converter.
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