Driving device of plasma display panel and method

A driving device of a plasma display panel (PDP) having a plurality of pixels located at crossing of a plurality of first and second electrodes and a plurality of third electrodes, the driving device comprising:

• a sustain pulse supply for supplying a sustain voltage to the first electrodes;
• a ramp pulse supply for supplying a ramp up pulse having a voltage that increases from the sustain voltage at a constant slope, and a ramp down pulse having a voltage that decreases from the sustain voltage at a constant slope, to the first electrodes;
• and
• a scan voltage supply for supplying a first scan voltage and a second scan voltage to the first electrodes,
• wherein the ramp pulse supply comprises a first transistor coupled between a voltage source and a ramp up pulse outputting node and configured as constant current source;
• a second transistor configured as constant current source, a source of the second transistor coupled to a second scan voltage inputting terminal for inputting the second scan voltage;
• a resistive element coupled to a drain of the second transistor, the resistance value of the resistive element changing in response to temperature change;
• and a voltage dropping element coupled between the resistive element and a ramp down pulse outputting node.