XL8003

XLSEMI 80V 0.5A Switching Current Buck PFM LED Constant Current Driver Features n n n n n n n n n n n n Datasheet XL8003 General Description The XL8003 is a monolithic high voltage switching regulator with PFM that is specifically designed to operate from a 24V~80V DC supply. The XL8003 is a high efficiency LED driver switching regulator. The LED string is driven at DC constant current rather than constant voltage, thus providing constant current output and enhanced reliability. Wide 24V to 80V Input Voltage Range 0.2V current sense voltage reference. Directly drive 3~8 series 1W LED. Excellent line and load regulation. High efficiency up to 96%. Internal optimize power HV-MOSFET. Built in thermal shutdown function. Built in UVLO function. Built in current limiting function. Built in LED open & short protection. Built in soft-start circuit. Available in SOIC-8 package. Applications n n n EBIKE LED Lighting LED Lighting & LED LAMP General purpose lighting V w `R w Ûm b€ Ñ y .g w w te o f o om c . ch Figure1. Package Type of XL8003 Rev 1.2 1 XLSEMI 80V 0.5A Switching Current Buck PFM LED Constant Current Driver Pin Configurations NC VDD CSP SW 1 2 XL8003 3 4 6 5 VIN VIN 8 7 CSN CSN Datasheet XL8003 Figure2. Pin Configuration of XL8003 (Top View) Table 1 Pin Description Pin Number 1 2 3 4 5, 6 7, 8 Pin Name NC VDD CSP SW VIN CSN Description No Connected. The chip supply voltage. Current Sense Positive Terminal. Output Switching Pin Input high voltage Pin. vol...