Re: Using a resistor to fake a Inverter into thinking a CCFL is good
Nice approach! Care to share a picture of the inverter?
Reason I ask is because I've done something similar on a Royer oscillator design in a Dell E193FPc LCD. That design had two inverter transformers and each transformer was controlled separately by a PWM controller. Unfortunately, one of the inverters kept killing the driver transistors, so I decided to disable it. Did that by bridging the op-amp feedback pins on the PWM controller for the faulty inverter. Then removed the dead driver transistors. The monitor has been working like that for about a year now.
Right now, though, I have a different monitor that uses a single transformer which has only two pins on the high voltage section - one for each pair of CCFLs. I'm still trying to find a way to trick the feedback on the inverter. Seems impossible with this design. Hence why I am interested to see pictures of your inverter.
Nice approach! Care to share a picture of the inverter?
Reason I ask is because I've done something similar on a Royer oscillator design in a Dell E193FPc LCD. That design had two inverter transformers and each transformer was controlled separately by a PWM controller. Unfortunately, one of the inverters kept killing the driver transistors, so I decided to disable it. Did that by bridging the op-amp feedback pins on the PWM controller for the faulty inverter. Then removed the dead driver transistors. The monitor has been working like that for about a year now.
Right now, though, I have a different monitor that uses a single transformer which has only two pins on the high voltage section - one for each pair of CCFLs. I'm still trying to find a way to trick the feedback on the inverter. Seems impossible with this design. Hence why I am interested to see pictures of your inverter.
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