FEATURES
Adjustable output current LED driver Support digital and analog dimming control Maximum 120mA output current regulator Wide supply voltage ranges from 4.5V to 40V ±4% output current accuracy Confidential Lowquiescentcurrent Thermal protect: Current ramp down 3.3%/℃ RoHS Compliant and Halogen Free GENERAL DESCRIPTION
To achieve no flick feature with analog dimming control, the set output current is linearly controlled by dimming control (PDIM pin) ranging from 0.25V to 3V. However, digital dimming control is obtained by giving PWM signal to dimming control (PDIM pin). PS4508 is featured a thermal protection by output current ramp down (3.3%/℃) as junction temperature is located from 130℃ to 150 ℃. Moreover, taking reliability into consideration, the absolute maximum voltage rating (AMR) on VDD and OUT is designed as 45V ability to handle high voltage pulse suddenly. PS4508 is available in the cost-effective package SOT-23-6. APPLICATIONS
Bus/Train walk way lig...
