Abstract: A switching-type regulation driver comprises a transformer, a controller, a synchronous rectifier and a drive control module. The drive control module is connected to the synchronous rectifier and the non-homonymous end of the secondary winding respectively, and is used to detect a target parameter of the voltage at both power ends of the synchronous rectifier when the synchronous rectifier disconnects the conductive path between the non-homonymous end of the secondary winding and the reference ground. When it is detected that the target parameter of the voltage at both power ends of the synchronous rectifier meets a preset condition, the controller controls a switching action of the first transistor so that the primary winding transmits power to the secondary winding. According to the present disclosure, the pre-stage chip may be matched with to realize a function of dynamic acceleration, and the dependence on the output pin may be reduced.

Abstract: A controller having an on-time controller, an off-time controller, a switch control signal generator, and a jittering signal generator, wherein the jittering signal generator couples jitter into the on-time or the off-time of a primary switch of the power supply. Therefore the EMI performance may be improved.

Abstract: One embodiment of the present invention discloses a switch-mode power supply controller and associated method. In an embodiment, the controller comprises an on-time controller, an off-time controller, a switch control signal generator, and a jittering signal generator, wherein the jittering signal generator couples jitter into the on-time or the off-time of a primary switch of the power supply. Therefore the EMI performance may be improved.