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求推荐一款LED的恒流源驱动

输入12V,要求可以通过PWM调闪烁频率(最高500HZ),同时要求可以通过输入一个模拟电压(0-5V或者0到3.3V)去控制LED(8x12个灯,每个灯都是并联的,灯的压降在3.3V左右)阵列的亮度。PWM占空比百分之99,灯的亮度调到最大时,电流是1.6A。