CN217692695U - Charging detection circuit and charging device - Google Patents
Charging detection circuit and charging device Download PDFInfo
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- CN217692695U CN217692695U CN202220533638.1U CN202220533638U CN217692695U CN 217692695 U CN217692695 U CN 217692695U CN 202220533638 U CN202220533638 U CN 202220533638U CN 217692695 U CN217692695 U CN 217692695U
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Abstract
The utility model discloses a detection circuitry and charging device charge, include: the charged circuit comprises three charging pins and is used for charging a charged device; the charging circuit is used for supplying power to a charged circuit and specifically comprises an insertion detection pin, a charging anode, a charging cathode, a detector DET, a PNP tube Q2 and a PMOS tube Q1; when the charging circuit is in a charging state, the insertion detection pin, the charging anode and the charging cathode are respectively connected with three charging pins of the charged circuit. A charging device comprises the charging detection circuit, wherein the insertion detection pin, the charging anode and the charging cathode protrude out of a plane where the bottom of a charging bin is located; the height of the charging positive electrode is higher than that of the insertion detection pin and that of the charging negative electrode. The utility model discloses a provide an alternative of special chip, reduced the cost in the aspect of the detection that charges, improved the economic feasibility of product.
Description
Technical Field
The utility model relates to a field of charging, in particular to charging detection circuit and charging device.
Background
The existing spring PIN wireless charging technology comprises 2PIN and 3PIN, most of charging insertion detection is realized by detecting charging current during charging, a special chip is needed, the price of the chip is increased due to the current supply chain problem, the cost of the special chip is high, and the existing engineering economy requirement cannot be met.
SUMMERY OF THE UTILITY MODEL
For solving prior art, because proprietary chip cost is higher, the relatively poor technical problem of engineering economy, the utility model provides a detection circuitry and charging device charge, specific technical scheme as follows:
a charge detection circuit, comprising:
the charging circuit comprises three charging pins and is used for charging a charger;
the charging circuit is used for supplying power to the circuit to be charged and specifically comprises an insertion detection pin, a charging anode, a charging cathode, a detector DET, a PNP tube Q2 and a PMOS tube Q1; the detector DET is connected with a power supply anode VCC;
the base electrode of the PNP tube Q2 is connected with the detector DET, and the collector electrode of the PNP tube Q2 is connected with the power supply cathode GND;
the grid electrode of the PMOS tube Q1 is connected with the emitting electrode of the PNP tube Q2, and the drain electrode of the PMOS tube Q1 is connected with the positive electrode VCC of the power supply;
the base electrode of the PNP tube Q2 is connected with the insertion detection pin; the source electrode of the PMOS tube Q1 is connected with the charging positive electrode; the charging negative electrode is connected with the power supply negative electrode GND;
when the charging circuit is in a charging state, the insertion detection pin, the charging anode and the charging cathode are respectively connected with three charging pins of the charged circuit.
According to the technical scheme, a replacement scheme of a special chip is provided through circuit design, the cost in the aspect of charging detection is reduced, and the economic feasibility of a product is improved.
Preferably, the positive electrode VCC of the power supply is connected with the base electrode of the PNP tube Q2 through a second resistor;
and the source electrode of the PMOS tube Q1 is connected with the base electrode of the PNP tube Q2 through the second resistor.
Further preferably, the emitter of the PNP transistor Q2 is also connected to the source of the PMOS transistor Q1 through a first resistor.
Further preferably, the resistance value of the first resistor is 10 ten thousand ohms; the resistance value of the second resistor is 10 kilo ohms.
Preferably, when only the charging positive electrode is connected to the charging circuit, both the gate and the source of the PMOS transistor Q1 are at a high level.
Further preferably, when the insertion detection pin, the charging positive electrode and the charging negative electrode are all connected to the charging circuit, the emitter voltage of the PNP tube Q2 is greater than the base voltage of the PNP tube Q2, so that the PNP tube Q2 is turned on; the grid voltage of the PMOS tube Q1 is smaller than the source voltage of the PMOS tube Q1, so that the PMOS tube Q1 is conducted.
Preferably, the detector DET is further connected to an LED control circuit.
In the technical scheme, the LED control circuit is connected in series, so that the external part can be simply and effectively informed whether the charging equipment is inserted or not, and an extra MCU module is not needed, thereby further reducing the cost.
A charging device, a charging detection circuit, the insertion detection pin, the charging anode and the charging cathode protrude out of a plane where the bottom of a charging bin is located; the height of the charging positive electrode is higher than that of the insertion detection pin and that of the charging negative electrode.
Preferably, the insertion detection pin, the charging positive electrode, and the charging negative electrode are pogo pins.
Further preferably, the charging anode is located between the charging cathode and the insertion detection pin in the spatial layout.
In the technical scheme, the possibility of system short circuit is avoided and reduced by the design of a spatial arrangement mode among 3 spring pins and the matching of resistors, and the reliability of equipment is effectively improved.
The utility model discloses at least, include one of following technological effect:
(1) A substitution scheme of a special chip is provided, so that the cost in the aspect of charging detection is reduced, and the economic feasibility of the product is improved;
(2) By connecting the LED control circuit in series, the external device can be simply and effectively informed whether the equipment to be charged is inserted or not, and an additional MCU module is not needed, so that the cost is further reduced;
(3 through the design of the spatial arrangement mode among 3 spring pins, the possibility of system short circuit is avoided and reduced in cooperation with the resistance, and the reliability of the equipment is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the charging circuit of the present invention;
fig. 2 is a schematic view of the charging state of the present invention.
Inserting the detection pin 1;
a charging positive electrode 2;
a charging negative electrode 3;
charging pin 4 charging pin 5, charging pin 6;
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. Moreover, in an effort to provide a concise understanding of the drawings, components having the same structure or function may be shown in some of the drawings in a single schematic representation or may be labeled in multiple representations. In this document, "a" means not only "only one of this but also a case of" more than one ".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will refer to the accompanying drawings to describe specific embodiments of the present invention. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
Example 1:
as shown in fig. 1, the present embodiment provides a charge detection circuit, including:
the charging circuit comprises three charging pins and is used for charging a charger;
the charging circuit is used for supplying power to the circuit to be charged and specifically comprises an insertion detection pin 1, a charging anode 2, a charging cathode 3, a detector DET, a PNP tube Q2 and a PMOS tube Q1; the detector DET is connected with a power supply anode VCC;
the base electrode of the PNP tube Q2 is connected with the detector DET, and the collector electrode of the PNP tube Q2 is connected with the negative pole GND of the power supply;
the grid electrode of the PMOS tube Q1 is connected with the emitting electrode of the PNP tube Q2, and the drain electrode of the PMOS tube Q1 is connected with the positive electrode VCC of the power supply;
the base electrode of the PNP tube Q2 is connected with the insertion detection pin 1; the source electrode of the PMOS tube Q1 is connected with the charging anode 2; the charging cathode 3 is connected with the power supply cathode GND;
when the charging circuit is in a charging state, the insertion detection pin 1, the charging anode 2 and the charging cathode 3 are respectively connected with three charging pins of the charged circuit. Generally, the insertion detection pin 1 corresponds to the charging pin 4, the charging anode 2 corresponds to the charging pin 5, and the charging cathode 3 corresponds to the charging pin 6.
The existing spring PIN wireless charging technology comprises 2PIN and 3PIN, most of charging insertion detection is realized by detecting charging current during charging, a special chip is needed, the price of the chip is increased due to the current supply chain problem, the cost of the special chip is high, and the existing engineering economy requirement cannot be met.
Therefore, in the embodiment, the detection circuit is used to replace the original proprietary chip. When the charged circuit is not connected with the charging circuit, because the level between the grid electrode and the source electrode of the PMOS tube Q1 is the same, and the level of the two poles B and E of the PNP tube Q2 is the same, neither the PMOS tube Q1 nor the PNP tube Q2 is conducted, and no loop is formed, so that in the charging circuit, only a loop from a power supply to the detector DET exists, and the detector DET detects a high-level signal.
The embodiment provides a substitution scheme of a special chip through circuit design, reduces the cost in the aspect of charging detection, and improves the economic feasibility of products.
Preferably, when only the charging anode 2 is connected to the charging circuit, both the gate and the source of the PMOS transistor Q1 are at a high level.
When only the charging anode 2 is connected to the charging circuit, since the gate and the source of the PMOS transistor Q1 have the same level, a corresponding loop cannot be formed, and charging cannot be performed.
Further preferably, when the insertion detection pin 1, the charging positive electrode 2 and the charging negative electrode 3 are all connected to the charging circuit, the emitter voltage of the PNP tube Q2 is greater than the base voltage of the PNP tube Q2, so that the PNP tube Q2 is turned on; the grid voltage of the PMOS tube Q1 is smaller than the source voltage of the PMOS tube Q1, so that the PMOS tube Q1 is conducted.
When inserting the detection pin 1, charge anodal 2, when the negative pole 3 that charges is connected to charging circuit simultaneously, because the grid level of PMOS pipe Q1 this moment will be less than PMOS pipe Q1's source electrode level, thereby make PMOS pipe Q1 switch on, form from the anodal VCC of power to the anodal 2 that charges, reach the return circuit that the negative pole 3 that charges arrives power negative pole GND again by the charger, simultaneously, because inserting detection pin 1 and charging negative pole 3 and linking to each other, thereby lead to PNP pipe Q2's emitter voltage to be greater than PNP pipe Q2's base voltage, and then formed power positive VCC, to inserting detection pin 1, reach the route of power negative pole GND again.
In this case, the voltage drop of the detector DET is low due to the parallel connection of a plurality of devices, and whether the devices are normally connected can be easily determined by whether the detector DET is at low level or high level.
Preferably, the detector DET is further connected to an LED control circuit. The LED control circuit is used for judging whether the charging equipment is to be inserted or not by the on-off of the LED lamp, and the LED lamp is used as an indication, so that the MCU module can be omitted.
Through series connection LED control circuit, can simply effectual notice outside, treat that the battery charging outfit has inserted, do not need extra MCU module to the cost has further been reduced.
Preferably, the positive electrode VCC of the power supply is connected with the base electrode of the PNP tube Q2 through a second resistor; and the source electrode of the PMOS pipe Q1 is connected with the base electrode of the PNP pipe Q2 through the second resistor.
If only the detection pin 1 is inserted and the charging anode 2 is short-circuited, the short-circuit detection pin cannot form an electric loop; when the charging cathode 3 and the charging anode 2 are short-circuited, the charging anode 2 is often not output and is not short-circuited; only when the detection pin 1 and the charging cathode 3 are inserted, the short circuit can not affect the detection pin and the charging cathode due to the fact that the second resistor is connected in series; the resistance value of the second resistor is 10 kilo ohms.
This embodiment is through the setting of second resistance, and the effectual metal foreign matter of having avoided when getting into the storehouse that charges, the circuit board damage that the short circuit caused between the pogo pin.
Preferably, the emitter of the PNP transistor Q2 is further connected to the source of the PMOS transistor Q1 through a first resistor; the resistance value of the first resistor is 10 ten thousand ohms;
through setting up first resistance, avoid when PNP pipe Q2 switches on, positive VCC of power and power negative pole GND lug connection to lead to further short circuit.
Example 2:
as shown in fig. 2, the present embodiment provides a charging device, including the charging detection circuit of embodiment 1, wherein the insertion detection pin 1, the charging positive electrode 2, and the charging negative electrode 3 protrude from a plane where the bottom of the charging chamber is located; the height of the charging anode 2 is higher than that of the insertion detection pin 1 and the charging cathode 3. The insertion detection pin 1, the charging anode 2 and the charging cathode 3 are spring pins. The charging anode 2 is positioned between the charging cathode 3 and the insertion detection pin 1 in the spatial layout.
When the device to be charged is inserted into the charging bin, the device to be charged can be firstly contacted with the charging anode 2, and at the moment, because the G and S two poles of the PMOS pipe Q1 are both high level, the charging anode 2 can not output voltage. When the device to be charged continues to contact the insertion detection pin 1 and the charging negative electrode 3 at the bottom downwards, the insertion detection pin 1 and the charging negative electrode 3 are electrically connected, so that the insertion detection pin 1 is grounded. Then, because the voltage of the emitter is greater than the voltage of the base electrode, the PNP tube Q2 is conducted, so that the grid electrode level is smaller than the source electrode level to enter a conducting state, the charging anode 2 outputs external voltage, and the device to be charged is charged.
When the storehouse of charging had the foreign matter to enter into, because 3 spring pins become certain interval and arrange and the characteristics that high both sides are low in the middle of, hardly cause 3 spring pins short circuit simultaneously, and have and only when 3 spring pins short circuit simultaneously, charging circuit just can the short circuit.
In the embodiment, through the design of the spatial arrangement mode among the 3 spring pins, the possibility of system short circuit is avoided and reduced, and the reliability of the equipment is effectively improved.
The utility model discloses an above-mentioned embodiment, realized:
(1) A substitution scheme of a special chip is provided, so that the cost in the aspect of charging detection is reduced, and the economic feasibility of the product is improved;
(2) By connecting the LED control circuit in series, the external device can be simply and effectively informed whether the equipment to be charged is inserted or not, and an additional MCU module is not needed, so that the cost is further reduced;
(3 through the design of the spatial arrangement mode among 3 pogo pins, the cooperation resistance has avoided and has reduced the possibility of system's short circuit, the effectual reliability that improves equipment.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A charge detection circuit, comprising:
the charged circuit comprises three charging pins and is used for charging a charged device;
the charging circuit is used for supplying power to the circuit to be charged and specifically comprises an inserted detection pin, a charging anode, a charging cathode, a detector DET, a PNP tube Q2 and a PMOS tube Q1; the detector DET is connected with a power supply anode VCC;
the base electrode of the PNP tube Q2 is connected with the detector DET, and the collector electrode of the PNP tube Q2 is connected with the negative pole GND of the power supply;
the grid electrode of the PMOS tube Q1 is connected with the emitting electrode of the PNP tube Q2, and the drain electrode of the PMOS tube Q1 is connected with the positive electrode VCC of the power supply;
the base electrode of the PNP tube Q2 is connected with the insertion detection pin; the source electrode of the PMOS tube Q1 is connected with the charging positive electrode; the charging negative electrode is connected with the power supply negative electrode GND;
when the charging circuit is in a charging state, the insertion detection pin, the charging anode and the charging cathode are respectively connected with three charging pins of the charged circuit.
2. The charge detection circuit according to claim 1, wherein the positive power supply electrode VCC is connected to the base electrode of the PNP transistor Q2 via a second resistor;
and the source electrode of the PMOS tube Q1 is connected with the base electrode of the PNP tube Q2 through the second resistor.
3. The charge detection circuit according to claim 2, wherein the emitter of the PNP transistor Q2 is further connected to the source of the PMOS transistor Q1 through a first resistor.
4. A charge detection circuit according to claim 3, wherein the first resistor has a resistance of 10 kilo ohms;
the resistance value of the second resistor is 10 kilo ohms.
5. The charge detection circuit of claim 1, wherein when only the charging anode is connected to the charging circuit, the gate and the source of the PMOS transistor Q1 are both high.
6. The charge detection circuit according to claim 1 or 5, wherein when the insertion detection pin, the positive charge electrode and the negative charge electrode are all connected to the charge circuit, the emitter voltage of the PNP transistor Q2 is greater than the base voltage of the PNP transistor Q2, so that the PNP transistor Q2 is turned on; the grid voltage of the PMOS tube Q1 is smaller than the source voltage of the PMOS tube Q1, so that the PMOS tube Q1 is conducted.
7. The charge detection circuit according to claim 1, wherein the detector DET is further connected to an LED control circuit.
8. A charging device comprising a charging detection circuit as claimed in any one of claims 1 to 7, wherein the insertion detection pin, the charging positive electrode and the charging negative electrode protrude from a plane where the bottom of the charging chamber is located; the height of the charging anode is higher than that of the insertion detection pin and the charging cathode.
9. A charging arrangement as claimed in claim 8, in which the insertion detection pin, the charging positive electrode and the charging negative electrode are pogo pins.
10. A charging arrangement as claimed in claim 9, in which the positive charging pole is spatially disposed between the negative charging pole and the insertion detection pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220533638.1U CN217692695U (en) | 2022-03-11 | 2022-03-11 | Charging detection circuit and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220533638.1U CN217692695U (en) | 2022-03-11 | 2022-03-11 | Charging detection circuit and charging device |
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| Publication Number | Publication Date |
|---|---|
| CN217692695U true CN217692695U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220533638.1U Active CN217692695U (en) | 2022-03-11 | 2022-03-11 | Charging detection circuit and charging device |
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| CN (1) | CN217692695U (en) |
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- 2022-03-11 CN CN202220533638.1U patent/CN217692695U/en active Active
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