QX5238/39/40 LED 3 4 QX5238/39/40 QX5238/39/40 、 3/4 LED 。 、, ,、。 QX5238/39/40 CMOS , MOS ,VDS , 15 mA ,VDS 20 mV, VDS , QX5238/39/40 3.6V LED 。 QX5238/39/40 , 、。EN PWM , LED 。 QX5238/39...