AL1663 (NRND)

Description

The AL1663 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 total harmonic distortion (THD) under universal input voltage.

The AL1663 can support multiple dimming modes. When a 0.3 to 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. And for AL1663 When a digital signal is applied on PWMD pin and the APWM pin is connected with a hundreds of nF capacitor, the device will work in PWM-to-DC dimming mode.

The AL1663 features low start-up current and low operation current. It integrates multiple protections including over voltage, short circuit, over current and over temperature protection.

The AL1663 is available in SO-8 package.

Feature(s)

• Primary Side Regulation without Opto-coupler
• 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
• Support both PWM Dimming and Analog Dimming
• Internal Protections
• Under Voltage Lock Out (UVLO)
• Output Over Voltage Protection (OVP)
• Output Short Protection (OSP)
• Over Current Protection (OCP)
• Thermal Fold-back Protection (TFP)
• Over Temperature Protection (OTP)
• Low System Cost
• Package: SO-8

Application(s)

• General LED Lighting Driver with Dimming Function
• General Purpose Constant Current Source
• LED Backlighting Driver
• Smart LED Lighting