AL1665 Datasheet | Diodes Incorporated

HIGH PERFORMANCE DIMMABLE LED CONTROLLER Description The AL1665 is a high-performance single-stage flyback and buckboost controller, targeting dimmable LED lighting application. It is a primary side regulation (PSR) controller that can provide accurate constant current (CC) regulation without optocoupler and secondary control circuitry. It can be operated at BCM mode, which results in low EMI and high efficiency, and keeps high power factor (PF) and low total harmonic distortion (THD) under universal input voltage. The AL1665 can support analog/PWM dimming modes. When a 50m V to 2.5V DC signal is applied on ADIM pin, the device is operated in analog dimming mode. The analog dimming range is 5% to 100%. When a PWM signal is applied to NTC/PWM pin, the device is operated at PWM dimming mode. The PWM dimming range is 0.5% to 100% (1k PWM dimming frequency). The AL1665 has full protection Features . It integrates multiple protections including undervoltage lockout (UVLO), output overvoltage (OVP), output short circuit (OSP), overcurrent protection (OCP), winding short circuit, secondary diode short, internal thermal foldback (TFP), and overtemperature protection (OTP). The AL1665 is available in SO-8 (Standard) package. Pin Assignments (Top View) ADIM 1 NTC/PWM 2 P 3 CS 4 8 FB 7 VCC 6 OUT 5 GND SO-8 (Standard) Features Applications - Primary Side Regulation without Optocoupler - Valley Switching for Low Switching Loss - Tight CS Reference Voltage 0.4V±1.5% - High PF>0.9 and Low THD<20% - Support Analog and PWM Dimming - Analog Dimming Range: 5% to 100% - PWM Dimming Range: 0.5% to 100% (1k PWM Frequency) - Internal Protections - Undervoltage Lockout (UVLO) - Output Overvoltage Protection (OVP) - Output Short Protection (OSP) - Overcurrent Protection (OCP) - Winding Short-Circuit Protection - Secondary Diode Short Protection - Shorted Current Sense...