Abstract: Disclosed is a power loss protection integrated circuit. According to one embodiment, the power loss protection integrated circuit includes a buck/boost converter controller that operates in buck mode in a normal power supply state such that a portion of the power is used to store energy in a low voltage capacitor and operates in boost mode when the power supply is cut off such that the energy charged in the low voltage capacitor is utilized to supply emergency power to a main system.

Abstract: Discloses is an inrush current limiting circuit for a power system. In the power system that charges an output capacitor when an input voltage is initially applied and in which multiple resistance elements and switching elements are connected in an electrical path that connects the input voltage and an output voltage, the inrush current limiting circuit for the power system implements the soft start of the power system by limiting a peak value of an input current to a predetermined level or less by changing a total resistance value of the electrical path through an operation of the switching elements.

Abstract: Disclosed is a soft start circuit 100 for a power system 1. In the soft start circuit 100, an input voltage VIN is applied to charge an output capacitor COUT and output an output voltage VOUT such that a soft start of the power system 1 is achieved. A constant current is supplied onto an electrical path connecting the input voltage VIN and the output voltage VOUT to charge the output capacitor COUT at the soft start time.

Abstract: Disclosed is a power loss protection integrated circuit. In the power loss protection integrated circuit, an interrupt device is arranged on an electrical path between an output terminal of a buck converter and a low voltage capacitor such that a flow of current to the low voltage capacitor is limited upon initial operation to ensure stability of an output voltage of the buck converter, and after the passage of a predetermined time, the interrupt device is fully turned on when a voltage of the low voltage capacitor is almost the same as the output voltage of the buck converter such that the voltage of the low voltage capacitor is electrically connected to the output voltage of the buck converter.

Abstract: Disclosed is a power loss protection integrated circuit. In the power loss protection integrated circuit, an interrupt device is arranged on an electrical path between an output terminal of a buck converter and a low voltage capacitor such that a flow of current to the low voltage capacitor is limited upon initial operation to ensure stability of an output voltage of the buck converter, and after the passage of a predetermined time, the interrupt device is fully turned on when a voltage of the low voltage capacitor is almost the same as the output voltage of the buck converter such that the voltage of the low voltage capacitor is electrically connected to the output voltage of the buck converter.

Abstract: The present invention relates to a direct current/direct current (DC/DC) converter. According to the present invention, output ends of a plurality of converter circuits, each having two switches in a single fabricated integrated circuit (IC), are integrated by selectively connecting them to each other in the outside depending on the amount of current required for operation of the IC. Therefore, the DC/DC converter can operate with maximum efficiency in various user-desired load current ranges.

Abstract: Disclosed is a power loss protection integrated circuit. According to one embodiment, the power loss protection integrated circuit includes a buck/boost converter controller that operates in buck mode in a normal power supply state such that a portion of the power is used to store energy in a low voltage capacitor and operates in boost mode when the power supply is cut off such that the energy charged in the low voltage capacitor is utilized to supply emergency power to a main system.