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charging circuit

A charging circuit and battery technology, which is applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problems of increased power consumption of mobile phone batteries and troubles for users, and achieve the effect of eliminating the harm of reverse electromotive force and making full use of energy

Active Publication Date: 2018-01-30
SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the increase of mobile phone functions, the power consumption of the mobile phone battery is bound to increase. It is necessary to frequently charge the battery through the charging circuit of the mobile phone, which brings trouble to the user.

Method used

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Experimental program
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Embodiment Construction

[0012] see figure 1 , the charging circuit 100 of the preferred embodiment of the present invention includes a power management unit 10, a motor 20, a metal-oxide-semiconductor (Mental-Oxide-Semiconductor, MOS) transistor M, a first diode D1, a second diode D2, Inductor L, capacitor C and battery 30 .

[0013] The power management unit 10 includes a power output pin VIB and a control pin GPIO.

[0014] The motor 20 is connected to the power output pin VIB of the power management unit 10 , so that the power management unit 10 provides power for the motor 20 . Let one end of the motor 20 connected to the power output pin VIB be a first node A, and the other end be a second node B.

[0015] The drain d of the MOS transistor M is electrically connected to the B terminal of the motor 20, so that the motor 20 is electrically connected between the power output pin VIB and the drain d, the source s of the MOS transistor M is grounded, and the MOS transistor M The gate g of M is ele...

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PUM

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Abstract

A charging circuit, comprising a power management unit, a motor, a MOS transistor, a first diode, a second diode and a battery, the power management unit is used to drive the motor and control the on and off of the MOS transistor; when the power When the management unit drives the motor, the MOS transistor is on; when the power management unit stops driving the motor, the motor generates a reverse electromotive force, and the MOS transistor is turned off at this time, and the reverse electromotive force charges the battery; When the back electromotive force stops charging, the MOS transistor is turned on, and the back electromotive force is released through the second diode. The charging circuit of the present invention charges the battery with the reverse electromotive force, which eliminates the harm of the reverse electromotive force and fully utilizes the energy.

Description

technical field [0001] The invention relates to a charging circuit, in particular to a charging circuit applied to portable electronic devices. Background technique [0002] More and more mobile phones are equipped with vibration motors. Since the motor is an inductive coil, when the motor is disconnected from the power supply, the motor will generate a back electromotive force. In order to prevent the back electromotive force from burning out the power management unit that drives the motor (Power Management Unit, PMU), the usual practice is to connect a freewheeling diode in parallel to the motor, and the freewheeling diode and the motor form a loop to consume the reverse electromotive force. [0003] Along with the increase of mobile phone function, the electric energy consumption of mobile phone battery also will certainly increase, needs to charge battery frequently by the charging circuit of mobile phone, brings trouble to the user. Contents of the invention [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 钱忠根
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD