Seen in the accompanying schematic, the 555 square wave generator drives an MPF102 FET, which in turn drives a D718 power transistor that provides a “pulsed” 12V variable duty cycle driving the LED ...

This is only possible using parallel FET dimming (Fig. 3a). The switch is turned off and on to redirect the LED current through the switch and back through the LEDs at the desired duty cycle.

Dialog Semiconductor has improved its LED light dimming intellectual property ... Dialog has integrated digital algorithms that modulate primary FET switching to draw extra current during dimming.

The HV9986 three-channel, switchmode LED driver integrates three dimmer switch FET drivers that enable high PWM dimming ratios and independent fault management. The HV9986 three-channel ...

LED driver chip firms are putting a ... maintain input current by manipulating the FET gate. These are smart gate pulses, with three different phases for each cycle.” As different dimmers need ...

The MAP3301 features an embedded dimming FET and components within the IC that can reduce the ... the MAP3301 to meet the tighter space requirements of many newer and slimmer LED TV monitors. The ...