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Microchip HV96001离线LED驱动器解决方案

Microchip公司的HV96001是离线LED驱动器解决方案,可以进行线性调光和PWM调光,PWM调光具有无闪烁调光,低至0.01%或更低.器件可调整AC/DC转换器输出电压,以维持大范围LED负载电压时的高转换效率.它还能对LED电流幅度进行精密控制,从而维持恒定的色温.HV96001包括两个反馈稳压器,它用来控制反馈输出电压的控制,而升压稳压器用来控制LED电流的幅度.光偶驱动器电路驱动光偶合器,依次提供控制信号,用来驱动反馈转换器的控制输入.HV96001输入电压从8V到60V,PWM调光宽度低于150ns,调光频率高达20kHz.16L VQFN 3 mm x 3 mm和16L SOIC窄体封装,主要用在离线LED照明应用.本文介绍了HV96001主要特性,框图,典型应用电路图以及离线LED驱动器评估板ADM01030主要特性,电路图,材料清单和PCB设计图.

The HV96001 LED driver targets offline lighting applications requiring wide dimming capability. The device is capable of linear dimming and PWM dimming, with the PWM dimming capable of flicker-free dimming down to 0.01% level and lower.

The HV96001 is specifically adapted to LED driver designs that accommodate a wide range of the LED load voltage. The device adjusts the output voltage of the AC to DC conversion stage for maintaining a high conversion efficiency over a wide range of the LED load voltage. It also maintains a precise control over the LED current amplitude, thereby maintaining the consistent color temperature.

The adaptability of the device to wide range PWM dimming allows for a stable control of the LED current waveform for PWM dimming pulse widths down to 150

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