Universal Flybackand Buck-Boost Single Stage Dimmable LED Driver

Tuesday, October 24, 2017


The AL1673 is a high-performance single stage LED Driver-converter operating in Flyback and Buck-Boost topologies, targeting dimmable LED lighting applications. It operates in BCM mode which results in good EMI and efficiency.

The AL1673 supports 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 operating current. It integrates multiple protection functions including overvoltage, short-circuit, overcurrent and over-temperature protection.

The AL1673 has a built-in 600V/2A high-voltage MOSFET and is available in SO-8EP package.


The Diodes Advantage

The AL1673 is a high-performance single stage converter with built-in MOSFET for PWM/Analog dimming applications.

  • Highly-integrated converter in SO-8EP package. Low BOM cost solution
  • Built-in 2A/600V MOSFET. Small size and simple circuit design
  • Supports both PWM and Analog dimming. Can be dimmed by a PWM signal or a DC voltage
  • SO-8EP Package. Better thermal performance
  • High PF and low THD. PF > 0.9, THD < 20%
  • Built-in Undervoltage Lock-out, Output Open-Circuit Protection, Output Over-voltage Protection, Output Short-Circuit Protection, Thermal Foldback Protection and Over-Temperature Shutdown provides a complete protection function



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


For more information please contact:


Andrew Athanasiou

Engineer:  Field Application PLM

Arrow Altech Distribution

+27 (0) 21 555 1884

+27 (0) 83 231 1169