Silicon Works Co., Ltd.

Hong Kyu Choi

Jung Min Choi

Seong Sik Yoon

Young Jin Woo

Jung Hyun Tark

Won Suk Jang

Tae Kyu Nam

Power consumption of a display device is reduced by controlling power supplies in driving sections and in non-driving sections to be different.

Power management device to minimize power consumption

A switching power supply may include: an inductor connected to an input voltage terminal; a first switch configured to form a first electrical path between the inductor and an output voltage terminal; a second switch configured to form a second electrical path between the inductor and a ground voltage terminal; a negative current sensor configured to sense an inductor current flowing through the first electrical path, and generate an over-current protection signal when the inductor current is sensed as a negative current equal to or more than a preset value; and a controller configured to enable a discontinuous conduction mode (DCM) when the over-current protection signal is generated, and turn off the first switch and turn on the second switch, in response to the enabled DCM.

Switching power supply

Growing community of inventors

Cheongju-si, South Korea

Hong Kyu Choi