Low Line Only Low Profile T8, Isolated 23 W, Power Factor Corrected (PF >0.98), LED Driver Using LYTSwitchTM LYT4215E
This document describes a cost-effective power supply utilizing the LYTSwitchTM-0 family (LYT0006D) in a highly compact buck topology. This power supply operates over an input voltage range of 190 VAC to 265 VAC. The DC bus voltage is high enough to support an 85 V output when using a buck topology - in a buck converter the output voltage must always be lower than the input voltage. The output voltage is also limited by the maximum duty cycle of the LYTSwitch-0 (which also requires the input voltage to be larger than the output voltage). The reference design is not limited for retrofit lamp application; the design layout can be easily modified to fit in LED tube or ballast applications.
This document describes a non-isolated, power factor corrected, low THD, high-efficiency LED driver designed to drive a 144 V LED string at 180 mA from an input voltage range of 90 VAC to 265 VAC.
The document describes a non-isolated, high power factor (PF), high efficiency, TRIAC dimmable LED driver designed to drive a nominal LED string voltage of 41 V at 350 mA from an input voltage range of 195 VAC to 265 VAC (50 Hz typical).
This engineering report describes a non-dimmable, boost LED driver designed to drive a 385 V LED voltage string at 48 mA from an input voltage range of 195 VAC to 265 VAC. The LED driver utilizes the LYT5225D from the LYTSwitch-5 family of devices.
This engineering report describes a constant voltage (CV) output 8.4 W isolated flyback power supply with a single stage power factor correction circuit for smart lighting applications. The power supply is designed to provide a 24 V constant voltage across 0mA to 350 mA output current load. The board is optimized to operate with an input voltage range of 90 VAC to 265 VAC.
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