SYSTEMS AND METHODS FOR REDUCING STANDBY POWER CONSUMPTION OF SWITCH-MODE POWER CONVERTERS

摘要

Power conversion system and method. The system includes a first capacitor including a first capacitor terminal and a second capacitor terminal, a second capacitor including a third capacitor terminal and a fourth capacitor terminal, and a plurality of diodes including a first diode, a second diode, a third diode, and a fourth diode. The first diode is coupled to the second diode at a first node, the second diode is coupled to the fourth diode at a second node, the fourth diode is coupled to the third diode at a third node, and the third diode is coupled to the first diode at a fourth node. Additionally, the system includes a fifth diode including a first anode and a first cathode and a sixth diode including a second anode and a second cathode.

主权项

1. A power conversion system, the system comprising:
a first capacitor including a first capacitor terminal and a second capacitor terminal; a second capacitor including a third capacitor terminal and a fourth capacitor terminal; a plurality of diodes including a first diode, a second diode, a third diode, and a fourth diode, the first diode being coupled to the second diode at a first node, the second diode being coupled to the fourth diode at a second node, the fourth diode being coupled to the third diode at a third node, the third diode being coupled to the first diode at a fourth node; a fifth diode including a first anode and a first cathode, the first anode being connected to a first input terminal; a sixth diode including a second anode and a second cathode, the second anode being connected to a second input terminal, the first cathode and the second cathode being connected to a fifth node; a system controller including a first controller terminal, a second controller terminal, a third controller terminal, a fourth controller terminal, and a fifth controller terminal; a primary winding including a first winding terminal and a second winding terminal; a secondary winding coupled to the primary winding; an auxiliary winding coupled to the secondary winding; and a switch including a first switch terminal and a second switch terminal; wherein:
the first node is connected to the first input terminal;the second node is connected to the first winding terminal;the third node is connected to the second input terminal;the fourth node is biased to a predetermined voltage;the fifth node is connected to the first controller terminal;the second controller terminal is connected to the second input terminal;the third controller terminal is biased to the predetermined voltage;the fourth controller terminal is connected to the third capacitor terminal;the fourth capacitor terminal is biased to the predetermined voltage;the first capacitor terminal is connected to the first input terminal;the second capacitor terminal is connected to the second input terminal;the first switch terminal is connected to the fifth controller terminal; andthe second switch terminal is connected to the second winding terminal; wherein:
the first input terminal and the second input terminal are configured to receive an input voltage; andthe secondary winding is configured to generate an output voltage based on at least information associated with the input voltage.