M2005A

Status : Technology Demonstrator

PIR Light Controller IC with AC Dimmer and Push Button Adjust

GENERAL DESCRIPTION

The M2005A integrated circuit combines all required functions for a single chip PIR controller circuit for use in security lights and similar applications. The device contains an on-chip rectifier and regulator to allow direct connection to the AC mains supply, via a current limiting resistor. Sensitivity, on-time, light brightness and the fade time are digitally adjustable by means of push buttons. The PIRIN input signal is directly converted to a digital signal. All further signal processing and functions are performed digitally, thereby eliminating drift, associated with most analog PIR controllers.

ALTERNATIVE SOLUTION

The M2005 will lose settings as soon as the mains supply is switched off. This proves to be a severe weakness in the design. The M2000C/ E910.90 with trim pot adjust is better solution. The M2005A is not sold, but is shown on this page as a technology demonstrator.

APPLICATIONS

Outdoor/indoor security lights
Movement detector
Programmable light dimmer
Day-Night lamp switch
Energy savings applications
Light pollution prevention

FEATURES

Single chip solution
Soft on/off switching (fading)
Dimmer function with maximum brightness setting
On chip rectifier circuit for direct supply from mains voltage through series resistor
Digital signal processing eliminates drift
Minimum external components count
Parameters adjustable with push buttons
Can be used in 110V, 60Hz and 230V, 50Hz applications
Very fast settle time on power up