LED Driver

A LYTSwitch device monolithically combines a controller and high-voltage power FET into one package. The controller provides both high power factor and constant current output in a single-stage. The LYTSwitch controller consists of an oscillator, feedback (sense and logic) circuit, 5.9 V regulator, hysteretic over-temperature protection, frequency jittering, cycle-by-cycle current limit, auto-restart, inductance correction, power factor and constant current control.

• Minimum Output Power : 4.5 W
• Maximum Output Power : 25 W
• Better than ±5% CC regulation
• TRIAC dimmable to less than 5% output
• Fast start-up
  • <250 ms at full brightness
  • <1s at 10% brightness
• High power factor >0.9
• Easily meets EN61000-3-2
  • Less than 10% THD in optimized designs
• Up to 92% efficient
• 132 kHz switching frequency for small magnetics