AL1673

NOT RECOMMENDED FOR NEW DESIGN NO ALTERNATIVE AL1673 UNIVERSAL FLYBACK AND BUCK-BOOST SINGLE STAGE DIMMABLE LED DRIVER Description Pin Assignments The AL1673 is a high performance single stage Flyback/Buck-Boost converter, targeting dimmable LED lighting application. It is operating at BCM mode which results in good EMI and efficiency. The AL1673 can support multiple dimming modes. When a 0.3~2.4V DC signal is applied on APWM pin, the device will operate in analog dimming mode. When a digital signal is applied on APWM pin, the device works at PWM dimming mode. The AL1673 features low start-up current and low operation current. It integrates multiple protections including over voltage, short circuit, over current and over temperature protection. It also integrates 600V/2A high voltage MOSFET. (Top View) CS 1 GND 2 DRAIN 3 DRAIN 4 8 COMP 7 APWM EP 6 FB 5 VCC SO-8EP The AL1673 is available in SO-8EP package. Applications Features General LED Lighting Driver with Dimming Function General Purpose Constant Current Source Smart LED Lighting Valley Switching for Low Switching Loss Low Start-Up Current High PF and Low THD High Efficiency Tight LED Current Variation Range Tight Output Open Voltage Variation Range Integrates 600V/2A MOSFET Support Both PWM Dimming and Analog Dimming  PWM Dimming Range:3% to 100% at 1kHz PWM Frequency  Analog Dimming and PWM-to-DC Dimming Range:18% to 100%; Internal Protections  Under Voltage Lock Out (UVLO)  Out...