Power management circuit and timing controller for display device

A timing controller comprising:

• a load analysis circuit configured to analyze image data for each frame of a plurality of frames and to calculate a panel load for each frame of the plurality of frames;
• and
• a communication circuit configured to generate a control signal corresponding to a size of the panel load and to transmit the control signal for changing a driving condition of a control circuit to a power management circuit including the control circuit,
• wherein the driving condition of the control circuit includes an adjustment of a number of driven power switches driven in response to the control signal including information on the size of the panel load,
• the adjustment of the number of driven power switches includes:
• a first adjustment for driving a first power switch and for not driving a second power switch in case the size of the panel load is a first value,
• a second adjustment for not driving the first power switch and for driving the second power switch in case the size of the panel load is a second value greater than the first value, and
• a third adjustment for driving both the first power switch and the second power switch in case the size of the panel load is a third value greater than the second value.