Datasheet Summary
Universal High Brightness LED Driver
GENERAL DESCRIPTION
PT4207 is an AC/DC buck constant current driver for high power LED lighting applications. The IC uses a constant off-time control scheme. Both off time and peak LED current is externally programmed. The operating duty cycle can be as wide as 100% and it can power LED load from a 20V-450V power supply. The peak LED current pensation makes sure the LED current is stable within the overall input range. The PT4207 integrates a 350mA low side switch. Besides, it provides EXT pin to drive external low side power switch to extend current capacity. The dedicated DIM input can accept either a 0.5V-2.5V analog dim signal or a PWM dim...