FEATURES
20mA constant current LED regulator Wide input voltage range from 4.5V to 40V 60V breakdown voltage ±3.5% LED current accuracy Confidential Thermal protection: Current ramp down at 65oC GENERAL DESCRIPTION
PS4500 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, PS4500 is featured a current ramp down function from 65oC to 85oC 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, PS4500 also supports both high-side and low-side driving for the LED strings. PS4500 is bare die and die size is 426um x 745um, which is available for COB (chip on board) LED lighting application, etc. APPLICATIONS
Constant current LED (CCLED) Constant current COB light engine Simplified Applic...
