摘要:
The present invention discloses AC/DC converters and methods of manufacturing the same. The method includes providing a substrate; forming an oxide layer on a top surface of the substrate; applying a photo-resist layer on the oxide layer to define a well region; performing an ion-implantation in the well region using a dopant; and driving in atoms of the dopant to a depth in the well region through a thermal treatment, wherein the driving in process provides a concentration profile of the dopant in the well region such that the semiconductor structure has a high breakdown voltage.
摘要:
Power switch controllers and methods used therein are disclosed. An exemplifying power switch controller includes a window provider, a sensor and a logic controller. The window provider provides minimum and maximum time signals to indicate the elapses of a minimum time and a maximum time, respectively. The sensor detects a terminal of an inductive device, to generate a trigger signal. The logic controller prevents a power switch connected to the inductive device from being turned on before the elapse of the minimum time, forces the power switch to be turned on after the elapse of the maximum time, and turns on the power switch if the trigger signal is asserted.