Tung & Associates
LED driver using a depletion mode transistor to serve as a current source
In a LED driver using a depletion mode transistor to serve as a current source, the depletion mode transistor is self-biased for providing a driving current to drive at least one LED, thereby requesting no additional control circuit to control the depletion mode transistor. The driving current is independent on the supply voltage coupled to the at least one LED, thereby requesting no additional voltage regulator, reducing the circuit size, and lowering the cost.
Richtek Technology Corporation, R.O.C.
H Y
H05B Y02B
inventional additional
Chung-Lung Jing-Meng Hung-Der
Pai Liu Su