Re: Samsung Syncmaster 225BW
Sorry, I did not bookmark the datasheet URL but I did print some of it.
Had to shrink the jpeg a bit to get it attached here.
pinout:
1 + 15 inverter driver outputs
2 - Vdd +5V
3 - timer - RC constant for shutdown when problems detected
4 - dim - usually external voltage 1-2v to set brightness
5 - isen - current sensing on return side of ccfl tubes
6 - vsens - proportional to inverter output
7 - ovpt - overvoltage ref signal, somewhere arount 2.5v (AFAIK)
8 - 9 - no connection
10 - enable - below 1 v disables/resets controller
11 - lct - select mode for dimming, analog here
12 - sense problems with ccfl, voltage rise shuts it down
13 - startup and 'strike' osc control
14 - Vss
16 - driver ground
Schematic shows 20k/30k in the voltage divider for ovpt, but the samsung is using much higher values - I would not rely on the printed R and C values.
I will try to relocate that URL.....
Sorry, I did not bookmark the datasheet URL but I did print some of it.
Had to shrink the jpeg a bit to get it attached here.
pinout:
1 + 15 inverter driver outputs
2 - Vdd +5V
3 - timer - RC constant for shutdown when problems detected
4 - dim - usually external voltage 1-2v to set brightness
5 - isen - current sensing on return side of ccfl tubes
6 - vsens - proportional to inverter output
7 - ovpt - overvoltage ref signal, somewhere arount 2.5v (AFAIK)
8 - 9 - no connection
10 - enable - below 1 v disables/resets controller
11 - lct - select mode for dimming, analog here
12 - sense problems with ccfl, voltage rise shuts it down
13 - startup and 'strike' osc control
14 - Vss
16 - driver ground
Schematic shows 20k/30k in the voltage divider for ovpt, but the samsung is using much higher values - I would not rely on the printed R and C values.
I will try to relocate that URL.....
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