Abstract: A synchronous rectifier driving method, a synchronous rectifier circuit and a switching power supply are provided, and the method includes: detecting an output current in a secondary winding of a transformer unit, and generating a first driving signal according to the output current; obtaining a protection signal according to a voltage signal of the secondary winding of the transformer unit in a synchronous rectifier circuit; correcting the first driving signal by using the obtained protection signal to obtain a second driving signal; and driving a rectifier in the synchronous rectifier circuit according to the second driving signal.

Abstract: A synchronous rectifier driving method, a synchronous rectifier circuit and a switching power supply are provided, and the method includes: detecting an output current in a secondary winding of a transformer unit, and generating a first driving signal according to the output current; obtaining a protection signal according to a voltage signal of the secondary winding of the transformer unit in a synchronous rectifier circuit; correcting the first driving signal by using the obtained protection signal to obtain a second driving signal; and driving a rectifier in the synchronous rectifier circuit according to the second driving signal.

Abstract: Provided is apparatus and a method for driving synchronous rectifiers, which relate to the field of power supplies for communications. The apparatus includes: detection circuits, wherein each of the detection circuits is configured to detect drain and source voltages of one of synchronous rectifiers to obtain a detection signal for indicating a current direction in the one of the synchronous rectifiers; an isolated driving circuit, configured to generate isolated driving signals for driving the synchronous rectifiers according to the detection signals output by the detection circuits; and the synchronous rectifiers, configured to synchronously rectify input signals from a main transformer by using the isolated driving signals. The present disclosure can obtain the isolated driving signals of the synchronous rectifiers simply and effectively, and has a superior protective feature in case of shoot-through and other abnormalities.

Abstract: Provided is apparatus and a method for driving synchronous rectifiers, which relate to the field of power supplies for communications. The apparatus includes: detection circuits, wherein each of the detection circuits is configured to detect drain and source voltages of one of synchronous rectifiers to obtain a detection signal for indicating a current direction in the one of the synchronous rectifiers; an isolated driving circuit, configured to generate isolated driving signals for driving the synchronous rectifiers according to the detection signals output by the detection circuits; and the synchronous rectifiers, configured to synchronously rectify input signals from a main transformer by using the isolated driving signals. The present disclosure can obtain the isolated driving signals of the synchronous rectifiers simply and effectively, and has a superior protective feature in case of shoot-through and other abnormalities.

Abstract: Disclosed are a high-voltage protection circuit, a high-voltage protection method and a power supply. The high voltage protection circuit comprises a main relay, an auxiliary relay, a first resistor, a second resistor, a first capacitor and a second capacitor, wherein one end of the main relay is connected to the input port of a live line, and the other end thereof is connected to the output port of the live line; one end of the auxiliary relay is connected to the input port of the live line, and the other end thereof is connected between the first resistor and the second resistor; one end of the first capacitor is connected to the output port of the live line, and the other end thereof is connected to a neutral line parallel to the live line; the second capacitor is connected to both ends of the main relay in parallel; and the second resistor and the first resistor are connected between the input port and the output port of the live line in series in sequence.

Abstract: Disclosed are a high-voltage protection circuit, a high-voltage protection method and a power supply. The high voltage protection circuit comprises a main relay, an auxiliary relay, a first resistor, a second resistor, a first capacitor and a second capacitor, wherein one end of the main relay is connected to the input port of a live line, and the other end thereof is connected to the output port of the live line; one end of the auxiliary relay is connected to the input port of the live line, and the other end thereof is connected between the first resistor and the second resistor; one end of the first capacitor is connected to the output port of the live line, and the other end thereof is connected to a neutral line parallel to the live line; the second capacitor is connected to both ends of the main relay in parallel; and the second resistor and the first resistor are connected between the input port and the output port of the live line in series in sequence.