CN210603337U

CN210603337U - Application circuit of Hall IC element

Info

Publication number: CN210603337U
Application number: CN201921344128.4U
Authority: CN
Inventors: 刘双春; 孙观福; 刘全喜; 魏肃; 刘家斌; 黄志强
Original assignee: Xiamen Chipsun Science and Technology Co Ltd
Current assignee: Xiamen Chipsun Science and Technology Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-05-22
Anticipated expiration: 2029-08-19

Abstract

The utility model relates to an application circuit of hall IC component, including hall IC component and control circuit, hall IC component has three pin VDD, OUT and GND, has concatenated resistance R2 between pin VDD and the OUT, control circuit includes control chip U1, control chip U1's P44 mouth with the pin VDD of hall IC component passes through first connection of electric lines, control circuit's GND with the pin GND of hall IC component passes through second connection of electric lines, and the power VCC concatenates resistance R1 and is connected to on the first electric lines. The circuit flexibly utilizes the internal characteristics of the output port of the Hall IC element during design, uses 2 resistors and matches the I/O of the control chip for A/D sampling, and can simultaneously supply power to the Hall IC element and transmit signals only by 2 flat cables, so the material cost is relatively low, and the required structural space is small.

Description

Application circuit of Hall IC element

Technical Field

The utility model relates to a position detection circuit field specifically relates to a hall IC component's application circuit.

Background

Along with the development of scientific technology and the improvement of living standard of people, various portable devices and small household electrical appliances develop rapidly, various water purifying devices are produced at the same time, and the development is towards the direction of intellectualization and miniaturization, so that the realization of functions such as the position detection of movable parts on the devices and the waterless detection of a water tank is particularly important, a Hall IC element is used as a magnetic field detection device and can be effectively used for detecting the position of the movable parts and the water level condition of the water tank by matching with a magnet and a structural part, and compared with the traditional contact type detection mode, the detection mode is not easy to age and wear and has high sensitivity; the detection method is the detection mode which is the most widely and effectively applied and has the highest cost performance in the existing equipment, however, in order to effectively detect the Hall IC element during application, the Hall IC element is required to be independently attached to the structural part of the equipment in an attached mode, and then a detection signal is transmitted to a control board through a flat cable, and the detection method is basically realized by adopting the scheme shown in FIG. 1 at present. When the Hall sensor is applied, the P44 port of the control chip U1 is used for detecting Hall signals, when the Hall IC element does not detect a magnetic field, the output port OUT of the Hall IC element is in an off state due to the fact that an internal N-channel MOS tube is opened, and the P44 port of the control chip U1 detects a high level; when a magnet is close to the Hall IC element and detects that a magnetic field exists, an output port OUT of the Hall IC element is grounded due to conduction of an internal N-channel MOS tube, and a P44 port of the control chip U1 detects a low level.

The connection of the control panel and the Hall IC element of the scheme needs three connecting wires, on the one hand, the increase of the flat cables needs larger structural space, which is not in accordance with the current trend of miniaturization and portability; on the other hand, the increase of the connecting wires also causes the increase of material cost, the Hall assembly position is limited, and the welding reject ratio is higher under the condition of small space.

Disclosure of Invention

The utility model aims at providing a hall IC component's application circuit to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:

the utility model provides an application circuit of hall IC component, includes hall IC component and control circuit, the hall IC component has three pin VDD, OUT and GND, has concatenated resistance R2 between pin VDD and the OUT, control circuit includes control chip U1, control chip U1's P44 mouth with the pin VDD of hall IC component passes through first connection of electric lines, control circuit's GND with the pin GND of hall IC component passes through the second connection of electric lines, and power VCC concatenates resistance R1 and is connected to on the first electric line.

Furthermore, two ends of the first wire and the second wire are connected with plugs, the Hall IC element and the control circuit are respectively connected with a socket, and the plugs are plugged into the sockets.

Further, resistor R2 is bonded and encapsulated within the hall IC element.

Further, the resistor R1 and the resistor R2 are 1k Ω and 2k Ω, respectively.

Further, the model of the control chip U1 is SN8P 2711B.

Further, a capacitor C2 is connected in series between the pin VDD and GND of the hall IC element.

The utility model adopts the above technical scheme, the beneficial effect who has is: the circuit flexibly utilizes the internal characteristics of the output port of the Hall IC element when in design, uses 2 resistors and matches the I/O of the control chip for A/D sampling, can simultaneously supply power and transmit signals for the Hall IC element only by 2 flat cables, and has relatively low material cost and small required structural space.

Drawings

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a schematic circuit diagram of an application circuit of a conventional Hall IC device;

fig. 2 is a schematic circuit diagram of an application circuit of the hall IC device according to the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 2, the application circuit of the hall IC element comprises a hall IC element 1 and a control circuit 2, wherein the hall IC element 1 is provided with three pins VDD, OUT and GND, a resistor R2 is connected between the pins VDD and OUT in series, and a capacitor C2 is connected between the pins VDD and GND in series. The control circuit 2 includes a control chip U1. Specifically, the model of the control chip U1 is SN8P 2711B. The P44 port of the control chip U1 is connected with a pin VDD of the Hall IC element through a first wire, the GND of the control circuit is connected with the pin GND of the Hall IC element through a second wire, and a power supply VCC series resistor R1 is connected to the first wire.

In the present embodiment, plugs are connected to both ends of the first wire and the second wire, and sockets to which the plugs are plugged are connected to the hall IC element 1 and the control circuit 2, respectively. More specifically, the hall IC 1 and the resistors R2 and C2 are soldered to one circuit board (referred to as a hall plate), the control circuit 2 is soldered to the other circuit board (referred to as a control board), the corresponding sockets are soldered to the hall plate and the control board, and the hall plate and the control board are connected by a two-core connecting wire (first and second wires) with a plug.

Preferably, resistor R2 is bonded and encapsulated within the hall IC element. This enables the hall IC element to be provided with only two pins (pins VDD/OUT and GND).

The working principle of the present invention is briefly described as follows: when the Hall IC element does not detect a magnetic field, the output port OUT of the Hall IC element is in a disconnected state due to the fact that an internal N-channel MOS tube is opened, one end, connected to the Hall IC element OUT, of the resistor R2 is equivalently disconnected, and the A/D value sampled by the I/O port P44 of the control chip U1 is VCC; when the Hall IC element detects a magnetic field, the output port OUT of the Hall IC element is grounded due to the conduction of an internal N-channel MOS tube, one end of the R2 connected with the output port OUT is equivalent to the ground, and the A/D value sampled by the I/O port P44 of the control chip U1 is equivalent to the voltage division value R2/(R1+ R2) VCC of VCC on R1 and R2. For example, when R1 is 1k Ω and R2 is 2k Ω, the divided voltage value is 0.667 VCC.

The circuit flexibly utilizes the internal characteristics of the output port of the Hall IC element during design, uses 2 resistors (R1 and R2) and is matched with the I/O (P44 port) of a control chip for A/D sampling, and can simultaneously supply power and transmit signals to the Hall IC element only by 2 flat cables, so the material cost is relatively low, and the required structural space is small.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The application circuit of the Hall IC element is characterized by comprising the Hall IC element and a control circuit, wherein the Hall IC element is provided with three pins VDD, OUT and GND, a resistor R2 is connected between the pins VDD and OUT in series, the control circuit comprises a control chip U1, a P44 port of the control chip U1 is connected with the pin VDD of the Hall IC element through a first electric wire, the GND of the control circuit is connected with the pin GND of the Hall IC element through a second electric wire, and a power VCC series resistor R1 is connected onto the first electric wire.

2. The application circuit of the hall IC of claim 1 wherein the first wire and the second wire are connected to plugs at both ends, the hall IC and the control circuit are connected to sockets, respectively, and the plugs are plugged into the sockets.

3. The application circuit of the hall IC of claim 1 wherein the resistor R2 is bonded and encapsulated within the hall IC.

4. The application circuit of the hall IC of claim 1 wherein the resistor R1 and the resistor R2 are 1k Ω and 2k Ω, respectively.

5. The application circuit of the Hall IC element according to claim 1, wherein the model number of the control chip U1 is SN8P 2711B.

6. The application circuit of the Hall IC element according to claim 1, wherein a capacitor C2 is connected in series between pins VDD and GND of the Hall IC element.