The invention relates to a near light and far
light control circuit of an automotive
headlamp. At present, the cost for realizing near light and far
light control of the automotive
headlamp is higher. The
control circuit comprises a singlechip EM78P153, a three-
terminal voltage stabilizing circuit and a full-bridge power
driving circuit, wherein, one end of a near light limit contact switch S1, one end of a far light limit contact switch S2 and two contacts of a near light and far light change-over switch S3 are respectively connected with the singlechip; the three-
terminal voltage stabilizing circuit comprises a three-
terminal voltage stabilizer and two filter capacitors; the full-bridge power
driving circuit comprises two PNP-type triodes, two NPN-type triodes, eight resistors and a
filter capacitor. A
DC motor in the invention is electrified to work at the moment of conversion of the near light and the far light of the automotive
headlamp to realize rapidly extend and retract so as to achieve the purpose that the far light and the near light respectively illuminate, thus realizing that the far light and the near light can share one
light source and one electronic
ballast, and saving the cost of the automotive headlamp. The
control circuit of the invention has low
power consumption and high reliability.