| Electronics > Repair |
| Philips Xitanium led driver - adding dimming option? |
| (1/1) |
| widlokm:
Hello, I acquired nice Philips led laps for the workshop, that are powered from philips xitanium power supply (pictures included). While there are many versions of the driver mine are unfortunately not "dimmable" - the only control method is SimpleSet interface. I am wondering if there is an option to add dimming function. Driver can be set by the simpleset over a wide range, so most of the hardware is there. It is very likely that dimming and other controls are on the small PCB (control.jpg) that is also connected to simleset antenna. Does anybody know this drivers? Or maybe someone has a dimmable version of similar driver and can send me some pictures of the boards? Control PCB has quite a lot of unconnected pins, so it is possible that some of them are used for dimming. Best regards, Michael W. |
| widlokm:
In case someone is interested: Small "add-on" board has ATtiny44 micro-controller with RFID Flash memory. 3 cpu pins are used to handle RFID flash (I2C + busy line), one analog input measures output driver voltage, and one pin has PWM signal that controls output current. This PWM is connected to R-C low pass filter and seems to be completely open-loop control. Only short circuit and open output is sensed (by voltage measure line) and PWM is reduced to "minimal" value. All other pins are either unconnected or connected to some test-points. It should be rather easy to write new firmware for the ATtiny using free pins as up/down control or something, keeping of course open/short output protection. The only thing is that CPU is not isolated form mains, so quite a lot of care is needed. |
| Kjelt:
Only got 75W dimmable drivers butnot with simpleset. One is 0-10V input, other one is Dali or simple Switch (short press on/off, long press dim up/down). They are not galvanically isolated so outputs are mains connected. If interested pm me. |
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