Lg Display Co., Ltd.

Postech Academy-industry Foundation

Bong-Koo Kang

Kyung-Min Lee

Jung-Jae Kim

Joung-Woo Lee

Hyung-Jin Choe

Young-Ho Hwang

Chang-Hyun Sung

Ho-Young Yoon

Jae-Jung Yun

A DC-DC converter control circuit with enhanced driving efficiency while securing circuit stability during light-load driving of the DC-DC converter through variation of an on/off duty ratio of a burst mode according to load. The control circuit includes a detection unit for detecting an amount of current and a voltage at an output stage of a DC-DC converter, and generating and outputting a differential voltage according to a level of the detected voltage, a comparison unit for comparing the differential voltage with a reference voltage having a triangle or sawtooth waveform, thereby generating a duty signal, and a converter controller for generating an on/off control signal corresponding to a duty ratio of the duty signal, and supplying the on/off control signal to the DC-DC converter, to control on/off of the DC-DC converter.

DC-DC converter control circuit, image display device using the same and driving method thereof

Disclosed herein are a DC-DC boost converter circuit, which is capable of preventing power loss and stabilizing switching elements by implementing soft switching and improving efficiency by adding a charge pumping function, and a method for driving the same. The DC-DC boost converter circuit, in which an inductor and an output diode are connected in series and an output capacitor and a load are connected to an output port of the output diode in parallel, includes an output stabilization circuit in which first and second switching elements, a transformer, a plurality of boost capacitors, and a plurality of diodes are connected in series/parallel between the inductor and the output diode.

DC-DC boost converter circuit with an output stabilization circuit and method for driving the same

Growing community of inventors

Pohang-si, South Korea

Bong-Koo Kang