The invention relates to a DC-DC12V25A adaptor having an electric door lock function special for an
electric vehicle. The adaptor comprises a main circuit and a
control circuit, wherein the two circuits employ independent circuit boards to achieve flexible plug of the main circuit and the
control circuit, replacement and
troubleshooting are facilitated when a fault occurs in one of the circuit boards, the whole circuit board is not needed to be replaced, the adaptor is convenient to maintain and install, materials are saved, and the production efficiency is improved; the electric door lock function,
energy storage and output over-
voltage protection can be achieved by the main circuit, and the
control circuit has an effect of
voltage stabilization on the circuit; the control circuit comprises a control
chip, a
voltage stabilization circuit, an oscillation circuit and a pulse output circuit; a voltage, such as 48V, 60V, 64V and 72V, used by a storage battery of the
electric vehicle is converted to 12V, and a rated working voltage is provided for a 12V low-voltage power utilization device such as a lighting lamp, an instrument, a horn, a window wiper, a light indicator, a fan, a radioand a
backup camera.