PS4501
Features
20m A constant current LED regulator
Wide input voltage range from 4.5V to 40V
60V breakdown voltage
±3.5% LED current accuracy
Thermal protection: Current ramp down at 125o C
Confidential General Description
PS4501 is a single channel LED driver with constant current regulator. PS4501 offers excellent temperature stability and output current accuracy (±3.5%) with wide input voltage from 4.5V to 40V and temperature range. PS4501 implements various fixed output current versions without external current setting resistors and thus creates a simple solution for constant current LED driver. Besides, for the thermal management in LED, PS4501 is featured a current ramp down function from 125o C to 145o C of junction temperature. Moreover, taking reliability into consideration, the maximum voltage rating on VDD, VP and VN is designed as 60V ability to handle high voltage pulse suddenly. Thoughtfully, PS4501 also supports both high-side and low-side driving for the LED...
