AL1673 (Not Recommended for new design)

Description

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.

The AL1673 is available in SO-8EP package.

Feature(s)

• 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)
• 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-8EP

Application(s)

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