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Mobile communication terminal and circuit used for protecting charging of mobile communication terminal

A mobile communication terminal and protection circuit technology, applied in emergency protection circuit devices, battery circuit devices, circuit devices, etc., can solve the problem that there is no hardware method, the charger voltage input has no reverse protection function, and the mobile phone power management chip is easily damaged. and other problems to achieve the effect of protecting from damage and preventing reverse flow

Active Publication Date: 2013-04-03
HUIZHOU TCL MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current mobile phone charging circuit design, the charging circuit has no reverse protection function for the charger voltage input, and there is no hardware method to prevent the battery of the mobile phone from feeding back the power to the charger.
In actual use, the user may use the wrong charger to plug in. Since the mobile phone circuit has no reverse voltage and reverse current protection functions, the power management chip of the mobile phone is easily damaged.

Method used

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  • Mobile communication terminal and circuit used for protecting charging of mobile communication terminal
  • Mobile communication terminal and circuit used for protecting charging of mobile communication terminal

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Embodiment Construction

[0015] see figure 1 , figure 1 It is a schematic diagram of a circuit for protecting charging of a mobile communication terminal according to the present invention. Such as figure 1 As shown, the circuit 10 for protecting charging of a mobile communication terminal suggested in this embodiment includes: a comparator 103 , a first MOS transistor 101 , a second MOS transistor 102 , a diode 105 , a first resistor 106 and a second resistor 104 .

[0016] In this embodiment, the anode of the diode 105 is connected to the drain of the first MOS transistor 101, the cathode of the diode 105 is connected to the source of the first MOS transistor 101, and the source of the first MOS transistor 101 is also connected to the charging unit of the mobile communication terminal 12 and the negative input terminal of the comparator 103, the drain of the first MOS transistor 101 is also connected to the charging interface 11 of the mobile communication terminal and the positive input terminal ...

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Abstract

The invention discloses a mobile communication terminal and a circuit used for protecting charging of the mobile communication terminal. The circuit comprises a comparator, a first MOS (metal oxide semiconductor) tube, a second MOS tube, a diode, a first resistor and a second resistor, wherein an anode of the diode is connected with a drain electrode of the first MOS tube, a cathode of the diode is connected with a source electrode of the first MOS tube, the source electrode of the first MOS tube is further connected with a charging unit of the mobile communication terminal and a negative input end of the comparator, the drain electrode of the first MOS tube is further connected with a charging interface of the mobile communication terminal and a positive input end of the comparator, a grid electrode of the first MOS tube is connected with a drain electrode of the second MOS tube, a grid electrode of the second MOS tube is connected with an output end of the comparator, a source electrode of the second MOS tube is grounded through the second resistor, one end of the first resistor is connected with the grid electrode of the first MOS tube, and the other end of the first resistor is connected with the source electrode of the first MOS tube to protect the mobile communication terminal. By the mode, counterflow of current or voltage can be prevented, so that the mobile communication terminal is protected from damages.

Description

technical field [0001] The invention relates to the technical field of mobile communication terminals, in particular to a mobile communication terminal and a circuit for protecting charging of the mobile communication terminal. Background technique [0002] In the design of the mobile phone charging circuit in the prior art, the charging circuit has no reverse protection function for the voltage input of the charger, and there is no hardware method to prevent the battery of the mobile phone from feeding back the power to the charger. In actual use, the user may use the wrong charger to plug in. Since the mobile phone circuit does not have reverse voltage and reverse current protection functions, the power management chip of the mobile phone is easily damaged. Contents of the invention [0003] The technical problem mainly solved by the present invention is to provide a mobile communication terminal and a circuit for protecting charging of the mobile communication terminal,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02H11/00
Inventor 张帆
Owner HUIZHOU TCL MOBILE COMM CO LTD
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