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Power management circuit and display panel

A power management, power management chip technology, applied in the field of power supply, can solve problems such as system failure, fuse burnout, and no technical solutions

Active Publication Date: 2022-07-12
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it takes tens of milliseconds to adopt this method, so the fuse has been burned before the protection occurs, causing the system to fail to work normally
[0003] For the above problems, there is no effective technical solution

Method used

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  • Power management circuit and display panel
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Embodiment Construction

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0026] In th...

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PUM

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Abstract

Embodiments of the present application provide a power management circuit and a display panel. The power management circuit includes: a power supply input terminal, a voltage conversion chip, a first switch unit, a power management chip, an isolation triode, a first diode and a second diode; the power supply input terminal and the anode of the first diode connection, the cathode of the first diode is connected to the input end of the isolation triode, the output end of the isolation triode is connected to the cathode of the second diode, and the anode of the second diode is connected to the power supply end of the power management chip The power supply input terminal is also connected to the control terminal of the isolation transistor, the common node of the isolation transistor and the second diode is grounded, the control terminal of the first switch unit is connected to the voltage conversion chip, and the input terminal of the first switch unit is connected to the power supply input The terminal is connected to the common node of the first diode, the output terminal of the first switch unit is grounded, and the enable pin of the voltage conversion chip is connected to the second diode and the common node of the power management chip.

Description

technical field [0001] The present application relates to the field of power technology, and in particular, to a power management circuit and a display panel. Background technique [0002] In order to prevent the short-circuit of the VAA voltage terminal causing the input voltage to be directly short-circuited, the BOOST chip has an error protection mechanism. When a short circuit occurs, the corresponding function pin is triggered to pull down the enable signal internally. At this time, the triode in the voltage conversion circuit is turned off to cut off the power supply input terminal and the VAA voltage terminal for protection. However, it takes tens of milliseconds to adopt this method, so the fuse has been burned before the protection has occurred, resulting in the system not working properly. [0003] There is currently no effective technical solution for the above-mentioned problems. SUMMARY OF THE INVENTION [0004] The purpose of the embodiments of the present ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/12H02H7/20H02M3/156
CPCH02H7/12H02H7/1213H02H7/20H02M3/156Y02B70/10
Inventor 吴永锋李文芳
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD