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Load automatic detection circuit and mobile power supply using it

A technology of automatic detection and mobile power, applied in circuit devices, battery circuit devices, battery over-discharge protection, etc., can solve the problems of high component cost and large static power consumption, achieve fast response, save component cost, and reduce complexity degree of effect

Active Publication Date: 2018-05-29
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] In view of this, the object of the present invention is to provide an automatic load detection circuit and a mobile power supply using it, in order to solve the technical problems of high component cost and large static power consumption in the prior art

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  • Load automatic detection circuit and mobile power supply using it
  • Load automatic detection circuit and mobile power supply using it
  • Load automatic detection circuit and mobile power supply using it

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Embodiment Construction

[0027] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

[0028] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0029] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...

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Abstract

The invention discloses a load automatic detection circuit and a mobile power supply using the same. The invention adopts analog devices and logic components. Since the voltage at the output terminal of the mobile power supply will drop when the load is inserted, the detection and comparison circuit can detect The voltage at the output terminal drops and deflects to confirm that there is a load inserted, and the load is charged through the booster module. After the load is inserted, a voltage drop will occur on the capacitor of the switch at the load end, so that the gate-source voltage of the switch at the load end reaches the load. The conduction threshold of the terminal switch is used to make the load terminal switch conduction and prolong the time for the voltage drop at the output terminal to allow sufficient detection time; in addition, both the detection comparison circuit and the reset circuit of the present invention can realize fast response. The invention does not need a single-chip microcomputer, reduces processing power consumption, and can integrate each module into a single chip, reduces peripheral devices, reduces system design complexity, and saves component costs.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an automatic load detection circuit and a mobile power supply using the same. Background technique [0002] With the development of digital technology and the expansion of its functions, more and more digital products (such as mobile phones, tablet computers, digital cameras, camcorders, PDA, MP3, MP4, GPS, etc.) growing demand. [0003] Various digital products in the prior art mostly use standard power supply batteries, such as polymer batteries or lithium-ion batteries. At present, the charging output voltage commonly used in mobile power supplies on the market is mostly a fixed mode, which is generally based on the main control circuit design of the MCU. [0004] At present, there are two types of mobile power supplies on the market. One is that after the load is plugged in, the mobile power supply needs to be manually pressed to charge the load, which will increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCH02J7/00306H02J7/0036H02J2207/10H02J2207/20
Inventor 黄智
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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