AL1666S-13

AL1666 HIGH PERFORMANCE DIMMABLE LED CONTROLLER Description Pin Assignments NEW PRODUCT The AL1666 is a high performance single stage Flyback and Buckboost controller, targeting dimmable LED lighting application. It is a primary side regulation (PSR) controller which can provide accurate Constant Current (CC) regulation without opto-coupler and secondary control circuitry. It is operating at BCM mode which results in good EMI and efficiency, and keeps high PF and low THD under universal input voltage. (Top View) The AL1666 can support analog/PWM dimming modes. When a 0 to 2.4V DC signal is applied on ADIM pin, the device will operate in analog dimming mode; when a digital signal is applied on PWMD pin and the ADIM pin is connected with hundreds of nF capacitors, the device will work at PWM-to-DC dimming mode. The dimming range is 1% to 100%. The AL1666 has rich protection features. It integrates multiple protections including Under Voltage Lock Out (UVLO), Output Over Voltage Protection (OVP), Output Short Circuit Protection (OSP), Over Current Protection (OCP), Winding Short Circuit, Secondary Diode Short, Internal Thermal Fold-Back Protection (TFP) and Over Temperature Protection (OTP). The AL1666 is available in SO-8 (Standard) package. ADIM 1 8 FB PWMD 2 7 VCC COMP 3 6 OUT CS 4 5 GND SO-8 (Standard) Applications     General LED Lighting Driver with Dimming Function 0 to 10V Dimming Luminaires General Purpose Constant Current Source Smart LED Lighting Features              Primary Side Regulation without Opto-Coupler Valley Switching for Low Switching Loss Support Analog and PWM-to-DC Dimming Analog/PWM-to-DC Dimming Range: 1% to 100% Tight CS Reference Voltage 0.4V±1.5% High PF>0.9 and Low THD