POWER MANAGEMENT CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME

A power management circuit of a display device includes: a boost converter configured to convert an input voltage into a first power supply voltage; a pass transistor configured to transfer the first power supply voltage as a second power supply voltage after a predetermined time from a time point a...

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Bibliographische Detailangaben
Hauptverfasser:	PARK SUNG CHUN, HONG JIN TAEK
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ADVERTISING APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CRYPTOGRAPHY DISPLAY EDUCATION ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS SEALS TESTING
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Beschreibung
Zusammenfassung:	A power management circuit of a display device includes: a boost converter configured to convert an input voltage into a first power supply voltage; a pass transistor configured to transfer the first power supply voltage as a second power supply voltage after a predetermined time from a time point at which the first power supply voltage is activated; and an overcurrent detect circuit configured to perform an overcurrent detect operation by sensing a current flowing through the pass transistor. Accordingly, the power management circuit may deactivate the second power supply voltage when a subtle short-circuit defect related to the second power supply voltage occurs. Therefore, even if a slight short circuit occurs, the power supply voltage can be disabled. 표시 장치의 전력 관리 회로는 입력 전압을 제1 전원 전압으로 변환하는 부스트 컨버터, 제1 전원 전압이 활성화된 시점으로부터 일정 시간 후 제1 전원 전압을 제2 전원 전압으로서 전송하는 패스 트랜지스터, 및 패스 트랜지스터에 흐르는 전류를 센싱하여 과전류 검출 동작을 수행하는 과전류 검출 회로를 포함한다. 이에 따라, 전력 관리 회로는 제2 전원 전압과 관련된 미세한 쇼트 결함이 발생된 경우 제2 전원 전압을 비활성화할 수 있다.