AL1666A Datasheet | Diodes Incorporated

Description The DIODESTM AL1666A is a high performance single stage Flyback and Buck-boost controller, targeting dimmable LED lighting application. It is a primary side regulation (PSR) controller which can provide accurate Constant Current (CC) regulation without optocoupler 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. The AL1666A 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 n F capacitors, the device will work at PWM-to-DC dimming mode. The dimming range is 1% to 100%. The AL1666A 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 AL1666A is available in SO-8 (Standard) package. 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 < 20% - High Efficiency - Internal Protections - Under Voltage Lock Out (UVLO) - Output Over Voltage Protection (OVP) - Output Short Protection (OSP) - Over Current Protection (OCP) - Winding Short Circuit Protection - Secondary Diode Short Protection - Internal Thermal Fold-back Protection (TFP) - Over Temperature Protection (OTP) - Tight LED Current Variation Range LED Current Line Regulation: ±2% (90VAC to 305VAC) LED Current Load Regulation: ±2% Full Load to Half Load - Package: SO-8 (Standard) - Totally Lead-Free & Fully Ro HS pliant (Notes 1 & 2) -...