Tung & Associates
Light emitting device driver circuit, light emitting device array controller and control method thereof
The present invention discloses a light emitting device array controller which controls a power stage to supply an output voltage to one end of each of a plurality of light emitting device strings. The other end of each of the light emitting device strings is coupled to a corresponding transistor having a current inflow end, a current outflow end and a control end. The present invention obtains signals from the control ends of the transistors instead of the current inflow ends, and feedback controls the output voltage according to the highest voltage of the control ends. Thus, the number of pins required for a circuit chip is reduced.
Richtek Technology Corporation, R.O.C.
H H
H05B H05B
inventional inventional
Jing-Meng
Liu