A1780 Datasheet, PDF (1/2 Pages) alpha microelectronics gmbh – dimmer IC for halogen lamps

a1780 general features
The a1780 is a dimmer IC for halogen lamps. It uses an integrated time controller to
control a wide range of DMOS switches, and includes protection circuits against over-
current, over-voltage and over-temperature. A LED gives a visual indication of the output
status at all times.
 Dimming range: between 10% and 95%
 Flexible soft start function (hot and cold – soft start)
 Zero-crossing detection
 Protection function for over-current, over-voltage and over-temperature
 LED status indication for protection function
 Ambient temperature range 0°C to 70°C
 Package: Die-in-waffle-pack or SOP14
example application schematic
A typical application schematic for a 350W load.