XL8001原厂规格书(2014版).pdf

XLSEMI 80V 0.5A H igh Efficiency Buck PFM LED Constant Current Driver XL8001 Features General Description n Operation Voltage DC 12V~80V. The XL8001 is a monolithic high voltage n 0.1V current sense voltage reference. switching regulator with PFM that is n Directly drive 1~8 Series 1W LED. specifically designed to operate from a n Excellent line and load regulation. 12V~80V DC power supply. n Internal Optimize Power HV-MOSFET. n Built in Thermal Shutdown Function. The XL8001 is a high efficiency LED driver n Built in Current Limiting Function. switching regulator. The LED string is driven n Built in Soft-Start Circuit. at DC constant current rather than constant n Available in SOIC-8 package. voltage, thus providing constant light output n Up to 97% efficiency. and enhanced reliability. Applications n LED Lighting LED LAMP n General purpose LED lighting Figure1. Package Type of XL8001 Rev 1.0 1 XLSEMI 80V 0.5A H igh Efficiency Buck PFM LED Constant Current Driver XL8001 Pin Configurations START 1 8 CSN VREG 2 7 CSN XL8001 CSP 3 6 VIN CSP 4 5 VIN Figure2. Pin Configuration of XL8001 (Top View) Table 1: Pin Description Pin Number Pin Name Description 1 START Inte