CN214380163U

CN214380163U - Switch type charging circuit and electronic equipment

Info

Publication number: CN214380163U
Application number: CN202022899858.XU
Authority: CN
Inventors: 蒋利军; 李木栅
Original assignee: Shenzhen Geekvape Technology Co Ltd
Current assignee: Shenzhen Geekvape Technology Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-10-08
Anticipated expiration: 2030-12-03

Abstract

The utility model provides a switch type charging circuit and electronic equipment, wherein, switch type charging circuit includes the input unit, the management unit charges, switch unit and electric core, the input unit electricity is connected in the management unit that charges, the management unit electricity that charges is connected in switch unit, the switch unit electricity is connected in electric core, when input unit has input current signal and/or input voltage signal, the management unit control switch unit that charges switches on, when input unit does not have input current signal and/or input voltage signal, the management unit control switch unit that charges turns off. The utility model discloses can reduce quiescent current's production by a wide margin, can reduce quiescent current to zero even.

Description

Switch type charging circuit and electronic equipment

[ technical field ] A method for producing a semiconductor device

The utility model relates to a charging circuit especially indicates a switch type charging circuit and applied this switch type charging circuit's electronic equipment.

[ background of the invention ]

Charging refers to a process of replenishing electric power to a storage battery in an electronic device such as a mobile phone, a computer, an electronic cigarette, and the like. In these electronic devices, it is usually necessary to provide a corresponding charging circuit to ensure the normal use of the charging function.

In the prior art, the charging circuit generally includes an input unit, a charging chip and a battery cell electrically connected in sequence, and when the input unit does not supply power, the battery cell reversely supplies power to the charging chip, thereby causing power consumption and generating excessive quiescent current.

Therefore, it is necessary to improve the structure of the charging circuit.

[ Utility model ] content

The utility model discloses the technical problem that will solve is: the utility model provides a switching type charging circuit and applied this switching type charging circuit's electronic equipment, solves the problem that charging circuit produced too much quiescent current among the prior art.

In order to solve the technical problem, the utility model discloses a technical scheme be:

the embodiment of the utility model provides a first aspect provides a switch type charging circuit, include: the charging management system comprises an input unit, a charging management unit, a switch unit and a battery cell, wherein the input unit is electrically connected to the charging management unit, the charging management unit is electrically connected to the switch unit, and the switch unit is electrically connected to the battery cell;

when the input unit has an input current signal and/or an input voltage signal, the charging management unit controls the switch unit to be switched on, and when the input unit does not have the input current signal and/or the input voltage signal, the charging management unit controls the switch unit to be switched off.

In some embodiments, the switching unit includes: and one end of the switch is electrically connected with the charging management unit, and the other end of the switch is electrically connected with the battery cell.

In some embodiments, the switch is any one of a PMOS transistor, a relay, a diode, and an IGBT.

In some embodiments, the switch is a PMOS transistor, and the switch unit further includes: the battery charging management device comprises a PMOS tube, a first resistor and a second resistor, wherein the drain electrode of the PMOS tube is electrically connected with the charging management unit, the source electrode of the PMOS tube is electrically connected with the battery cell, the grid electrode of the PMOS tube is electrically connected with the first resistor, one end of the second resistor is electrically connected with the common joint of the grid electrode of the PMOS tube and the first resistor, and the other end of the second resistor is electrically connected with the common joint of the source electrode of the PMOS tube and the battery cell.

In some embodiments, the input unit includes: the charging management device comprises a triode, a third resistor, a fourth resistor and an input terminal, wherein one end of the third resistor is electrically connected with an emitting electrode of the triode, the other end of the third resistor is electrically connected with a base electrode of the triode, a common joint of the base electrode of the triode and the third resistor is electrically connected with the input terminal, a common joint of the third resistor and the input terminal is electrically connected with one end of the fourth resistor, and the other end of the fourth resistor, and a common joint of the fourth resistor and the third resistor are electrically connected with the charging management unit.

In some embodiments, the charging management unit is a charging management chip.

The embodiment of the utility model provides a second aspect provides an electronic equipment, include: PCB board, be equipped with on the PCB board like the utility model discloses embodiment first aspect the switch type charging circuit.

From the above description, compared with the prior art, the beneficial effects of the present invention lie in:

the charging management unit is electrically connected with the battery cell, when the input unit inputs the input information, the switch unit is switched on, and the charging management unit supplies power to the battery cell through the input of the input unit; when the input unit does not have input, the switch unit is switched off, the battery cell does not reversely supply power to the charging management unit, the generation of static current is greatly reduced, and the static current can be reduced to zero.

[ description of the drawings ]

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely illustrative of some, but not all, embodiments of the invention. For a person skilled in the art, other figures can also be obtained from the provided figures without inventive effort.

Fig. 1 is a block diagram of a switch-type charging circuit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a switch-type charging circuit according to an embodiment of the present invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, fig. 1 is a block diagram of a switch-type charging circuit according to an embodiment of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a switch type charging circuit, including an input unit 110, a charging management unit 120, a switch unit 130 and a battery cell 140, wherein the input unit 110 is electrically connected to the charging management unit 120, the charging management unit 120 is electrically connected to the switch unit 130, and the switch unit 130 is electrically connected to the battery cell 140.

In practical application, when the input unit 110 has an input current signal and/or an input voltage signal, the charging management unit 120 controls the switch unit 130 to be turned on, and the charging management unit 120 supplies power to the battery cell 140 through the input of the input unit 110; when the input unit 110 does not have the input current signal and/or the input voltage signal, the charging management unit 120 controls the switch unit 130 to be turned off, and the battery cells 140 do not supply power to the charging management unit 120 in the reverse direction.

The embodiment of the utility model provides a switch type charging circuit can reduce quiescent current's production by a wide margin, can reduce quiescent current to zero even.

Referring to fig. 2, fig. 2 is a circuit diagram of a switch-type charging circuit according to an embodiment of the present invention.

As shown in fig. 2, as a possible implementation, the input unit 110 may include a transistor Q2, a third resistor R9, a fourth resistor R1, and an input terminal VIN, wherein one end of the third resistor R9 is electrically connected to the emitter 2 of the transistor Q2, the other end is electrically connected to the base 1 of the transistor Q2, a common junction of the base 1 of the transistor Q2 and the third resistor R9 is electrically connected to the input terminal VIN, a common junction of the third resistor R9 and the input terminal VIN is electrically connected to one end of the fourth resistor R1, the other end of the fourth resistor R1, and a common junction of the fourth resistor R1 and the third resistor R9 are electrically connected to the charge management unit 120.

Further, the switch unit 130 may include a PMOS transistor Q1, a first resistor R10, and a second resistor R8, wherein a drain D of the PMOS transistor is electrically connected to the charge management unit 120, a source S of the PMOS transistor is electrically connected to the battery cell 140, a gate G of the PMOS transistor is electrically connected to the first resistor R10, one end of the second resistor R8 is electrically connected to a common node between the gate G of the PMOS transistor Q1 and the first resistor R10, and the other end of the second resistor R8 is electrically connected to a common node between the source S of the PMOS transistor Q1 and the battery cell 140.

Further, in order to ensure the charging management function of the charging management unit 120, the charging management unit 120 at least includes a charging management chip U1.

IN practical applications, the transistor Q2, the third resistor R9 and the fourth resistor R1 form an input detection, and when the input terminal VIN has an input (e.g., a 5V input), the signal output from INT _ USB _ IN to the charge management chip U1 is at a low level; when the input terminal VIN is not input, the signal INT _ USB _ IN output to the charge management chip U1 is at a high level, and the pin INT _ USB _ IN connected to the charge management chip U1 is always set to be an internal pull-up. When the charge management chip U1 detects INT _ USB _ IN is at a low level, the charge management chip U1 sets MOS _ EN to be at a low level, the PMOS tube Q1 is switched on, and charging is normal; when the input terminal VIN does not have input or the battery cell BAT1 does not need to be charged, the charging management chip U1 sets the MOS _ EN to a high level, the PMOS transistor Q1 is turned off, at this time, the battery cell BAT1 cannot supply power to the charging management chip U1, so that the power supply of the battery cell BAT1 to the charging management chip U1 and peripheral circuits is zero, thereby achieving the purpose of reducing the static power consumption of the charging circuit, even zero. It is assumed that if the PMOS transistor Q1 is removed, BAT + and the battery cell BAT1 are directly short-circuited, the static consumption current in the charge management unit 120 is 20 μ a or more.

In other embodiments, the PMOS transistor Q1 may be replaced by any one of a transistor, a relay, a diode, and an IGBT. It should be understood that what kind of components are specifically selected to be used as the switch of the switch unit 130 is determined according to the actual application scenario, and the embodiment of the present invention does not limit this.

Furthermore, the embodiment of the utility model provides a still provide an electronic equipment who uses above-mentioned switch type charging circuit, this electronic equipment includes the PCB board, is equipped with above-mentioned switch type charging circuit on this PCB board.

It should be understood that the electronic devices include, but are not limited to, cell phones, computers, electronic cigarettes, and electric shavers.

It should be noted that the embodiments of the present invention are described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is further noted that, in the present disclosure, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switched-mode charging circuit, comprising: the charging management system comprises an input unit, a charging management unit, a switch unit and a battery cell, wherein the input unit is electrically connected to the charging management unit, the charging management unit is electrically connected to the switch unit, and the switch unit is electrically connected to the battery cell;

2. The switch-type charging circuit according to claim 1, wherein said switching unit comprises: and one end of the switch is electrically connected with the charging management unit, and the other end of the switch is electrically connected with the battery cell.

3. The switch-type charging circuit according to claim 2, wherein the switch is any one of a PMOS transistor, a relay, a diode, and an IGBT.

4. The switched-mode charging circuit of claim 3, wherein the switch is a PMOS transistor, the switching unit further comprising: the battery charging management device comprises a PMOS tube, a first resistor and a second resistor, wherein the drain electrode of the PMOS tube is electrically connected with the charging management unit, the source electrode of the PMOS tube is electrically connected with the battery cell, the grid electrode of the PMOS tube is electrically connected with the first resistor, one end of the second resistor is electrically connected with the common joint of the grid electrode of the PMOS tube and the first resistor, and the other end of the second resistor is electrically connected with the common joint of the source electrode of the PMOS tube and the battery cell.

5. The switch-mode charging circuit of claim 1, wherein the input unit comprises: the charging management device comprises a triode, a third resistor, a fourth resistor and an input terminal, wherein one end of the third resistor is electrically connected with an emitting electrode of the triode, the other end of the third resistor is electrically connected with a base electrode of the triode, a common joint of the base electrode of the triode and the third resistor is electrically connected with the input terminal, a common joint of the third resistor and the input terminal is electrically connected with one end of the fourth resistor, and the other end of the fourth resistor, and a common joint of the fourth resistor and the third resistor are electrically connected with the charging management unit.

6. The switch-mode charging circuit according to any of claims 1-5, wherein the charging management unit is a charging management chip.

7. An electronic device, comprising: PCB board, be equipped with the switching type charging circuit of any one of claims 1-6 on the PCB board.