AAL404 Print
The AAL404 is an IC intended for use in LED lamps (replacements for incandescent bulbs). The chip senses the input AC voltage of the lamp and looks for the chopping (phase cutting) that is produced by typical triac dimmers. An output signal whose duty cycle is proportional to the dead time caused by the dimmer is intended to drive the PWM control pin of an IC driving a string of LEDs. A second analog output provides for PWM control.

FeaturesImage
  • Digital DIM and Analog Outputs
  • External control of edge-detection function
  • High impedance sensing of AC input for minimum power dissipation.
  • Only a single resistor needed for sensing
  • Maintains proper operation, with no dimmer input
Applications
  • AC/DC LED Driver Applications
  • RGB backlighting
  • Backlighting of LCD and PDP panels
  • LED signs
  • LED decoration
  • Replacements for incandescent and fluorescent bulbs and fixtures
  • Road signs, traffic lights
Ordering Information
 Ordering PN(1)SubgroupDescription Temp. RangePackage Packing Type Packing Qty
 AAL404I-D-G-LFMonitoring and InterfacePhase Cut Dimming Interface
 Industrial8-Pin DIP Tube 50
 AAL404I-S8A-G-LFMonitoring and InterfacePhase Cut Dimming Interface Industrial8-Pin SOIC Tube 50
 AAL404I-S8A-G-LF-TRMonitoring and InterfacePhase Cut Dimming Interface Industrial8-Pin SOIC 13” T&R (2) 2500
 AAL404I-F8A-G-LFMonitoring and InterfacePhase Cut Dimming Interface Industrial3mm x 3mm, 8-Pin DFN

 Waffle Pack TBD
 AAL404I-F8A-G-LF-TRMonitoring and InterfacePhase Cut Dimming Interface  Industrial3mm x 3mm, 8-Pin DFN T&R (2), TBD TBD


(1) Only RoHS/Lead-Free Packaging is normally offered. 
(2) T&R - Tape and Reel     

 
 Download the data sheet
 
Download the application note