AL1677

NEW PRODUCT AL1677 UNIVERSAL, HIGH EFFICIENCY AND ACCURACY LED DRIVER CONVERTER Description The AL1677 is a universal AC-input (85~277 VAC), high-efficiency and high-accuracy Buck LED-driver converter. The AL1677 topology provides accurate constant current (CC) line and load regulation, operating at boundary conduction mode (BCM) to ease in EMI/EMC qualification and testing to meet the latest regulatory laws. The AL1677 system removes the auxiliary winding and external highvoltage MOSFET with few external components to create a low bill of material (BOM) cost solution. The AL1677 has rich protection features to enhance system safety and reliability. With thermal foldback function, the AL1677 can reduce output current when the driver’s temperature is higher than the setting value. Pin Assignments (Top View) GND 1 ROVP 2 NC 3 VCC 4 8 CS 7 CS 6D 5D SO-8 The AL1677 is available in SO-8 package. Features  > 90% Efficiency  Valley Detection to Minimize Switching Loss  Universal 85 to 277 VAC Input Range  Internal MOSFET up to 500V  Tight Current Sense Tolerance : ± 3%  Low Startup Current: 170µA  Low Operation Current: 100µA (Static)  Standard Inductor (no auxiliary winding)  Internal Protections - Undervoltage Lockout (UVLO) - Leading-Edge Blanking (LEB) - Cycle-by-cycle Overcurrent Protection(OCP) - Output Open/Short Protection(OVP/OSP) - Open-Load and Reload Detection - Thermal Foldback Function(TFP) - Over-Temperature Protection(OTP)  SO-8 Package  Totally Le...