PS4508
Features
Adjustable output current LED driver
Support digital and analog dimming control
Maximum 120m A 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%/℃ Ro HS pliant and Halogen Free
General Description
PS4508 is a single channel LED driver with adjustable output current. The output current typically ranges from 10m A to 120m A through external current setting resistor (REXT pin). 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 offers excellent output current accuracy with supply voltage (VDD pin) from 4.5V to 40V and output voltage (VPN) up to 40V. PS4508 is featured a thermal protection by output current ramp down (3.3%/℃) as...
