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Power supply management integrated circuit and display device

An integrated circuit and power management technology, applied in data processing power supply, electrical digital data processing, cathode ray tube indicator, etc., can solve the problem of local oscillator leakage at the moment of startup, and achieve improved local oscillator leakage, improved picture quality, increased The effect of placing the space

Inactive Publication Date: 2015-07-29
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a power management integrated circuit and a display device, which can improve the problem of local oscillator leakage at the moment of starting up, so as to improve the image quality, without changing the circuit and layout of the PCBA, and without increasing the placement of PCBA components. space

Method used

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  • Power supply management integrated circuit and display device
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  • Power supply management integrated circuit and display device

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] Such as figure 2 As shown, the power management integrated circuit described in the embodiment of the present invention includes a feedback pin FBN, and further includes:

[0029] The DC voltage output unit 20 is configured to output different DC voltages to the feedback pin FBN in time division.

[0030] The power management integrated circuit described in the embodiment of the present invention does not need an external circuit, and the power...

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Abstract

The invention provides a power supply management integrated circuit and a display device. The power supply management integrated circuit comprises a feedback pin and a DC (Direct Current) voltage output unit, wherein the DC voltage output unit is used for outputting different DC voltages to the feedback pin in a time-sharing manner. According to the invention, an external circuit is not required; different DC voltages can be directly output in a time-sharing manner by the power supply management integrated circuit so as to conveniently reach VGL (Vgatelow) controllability; the problem of start-up instant local oscillator leakage can be improved so as to improve image quality; moreover, a circuit and layout of a PCBA (printed circuit board assembly) do not need to be changed and a component placement space of the PCBA also cannot be increased.

Description

technical field [0001] The invention relates to the technical field of power management, in particular to a power management integrated circuit and a display device. Background technique [0002] The FBN (feedback pin) of the existing PMIC (Power Management IC, power management integrated circuit) can only output a DC level. If you want to achieve VGL (low level) controllable, for example, the voltage at the moment of power-on and during operation If the level is different, or the corresponding VGL is required to detect different screens or different temperatures, it is necessary to add a control circuit on the PCBA (Printed Circuit Board Assembly, printed circuit board). Such as Figure 1A As shown, the existing PMIC outputs a DC voltage Vfbn through FBN, and the first resistor R1 and the second resistor R2 need to be connected externally. The voltage difference between them has a certain ratio to adjust the size of the low-level VGL. Figure 1A , DRVN indicates the drive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG09G5/18G09G2330/026G09G2330/028G05F3/08G09G2310/0289G05F1/10G05F1/66G09G5/003G09G2310/08G09G2330/025G06F1/26G09G3/3696G06F1/3234
Inventor 宋嘉嘉刘磊董殿正赖政德王光兴
Owner BOE TECH GRP CO LTD
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