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Topics - mh

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Character LCDs / Driving backlight for NHD-C0220BiZ-FSRGB-FBW-3VM
« on: April 28, 2014, 02:56:13 PM »
Hello,
I'd like clarification on what the schematic shows to drive the backlight for this device. Basically, no resistors for the cathodes. Is this correct? I plan to drive the anode with 3.3V, same as the rest of the unit. The specs say 1.9V to drive red, 3.0v for green and blue, at 30mA for each. Is that max current handled internally, or should resistors be added to each cathode?

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