AMG-LM302 Datasheet, PDF (6/23 Pages) alpha microelectronics gmbh – Ballast Controller for Metal Halide Lamps

AMG-LM302
Ballast Controller for Metal Halide Lamps
switching frequency on the bridge. For burn state, it will generate a low switching frequency on
the bridge.
The open drain output Flag indicates the current state of the application:
Flag is high impedance = standby, low power mode
Flag is low = start up phase
Flag is changing state between low and high impedance = lamp ignition phase
The Flag output maybe used to drive an LED (with ext. resistor) or as a status indication to
other circuitry.
When the lamp is hot, the ignition phase can be very long (up to 30min.).
For the calculation of the various values of resistors and capacitors, please refer to section 11.
Applications and/or application note AMG-AN-LM302.
AMG-LM302 Revision: A
29. Jul. 2010 © All rights reserved Page 6 of 23