TWM650188U - water impedance operation controller - Google Patents

Abstract

A water impedance operation controller includes a circuit body that has at least a voltage detection control unit, a waterproof impedance component and a switching control unit, wherein the voltage detection control unit is used when an input voltage is greater than When the voltage value is set, the switching control unit can be driven to conduct and the operating state of the operation switch unit can be switched, so that the input voltage of the internal input power terminal cannot pass through the waterproof impedance unit.

Description

water impedance operation controller

This invention relates to a water impedance operation controller, especially a water impedance operation controller that can prevent the water impedance from consuming too much power and overheating parts.

A general car light switch unit, as shown in Figure 1, the car light switch unit 2 is arranged between an external input power supply terminal 1 and a waterproof impedance unit 3. Since the car light switch unit 2 is often damaged due to water ingress, Electric leakage may cause the car light switch unit 2 not to be switched, but the car lights electrically connected to the car light switch unit 2 may malfunction.

In order to avoid the occurrence of malfunction, the waterproof impedance unit 3 is electrically connected to the car light switch unit 2 to divide the voltage to avoid the possibility of malfunction.

However, in the above situation, when the car light switch unit 2 is flooded, the impedance will become smaller and smaller due to leakage, and finally it will be directly connected. However, because the waterproof impedance unit 3 is connected to divide the voltage, erroneous faults can be avoided. The waterproof impedance unit 3 is turned on, but because the voltage will become larger and larger, the waterproof impedance unit 3 will also consume too much power, causing the waterproof impedance unit to become hotter and hotter, which may eventually lead to the possibility of burning out.

Therefore, this case operates the controller through water impedance to detect that when the input voltage is greater than a set voltage value, the input voltage cannot pass through the waterproof impedance unit to avoid overheating due to excessive power consumption. Therefore, this case should be A best solution.

The water impedance operation controller of this invention includes a circuit body, which has at least one voltage detection control unit, and is electrically connected to an internal input power terminal for detecting whether the input voltage of the internal input power terminal is greater than a Set a voltage value, and when the input voltage is greater than the set voltage value, the input voltage can pass through the voltage detection control unit; a waterproof impedance component is electrically connected to the internal input power terminal, and the waterproof impedance component is at least It includes a waterproof impedance unit and an operation switch unit. The waterproof impedance unit has a plurality of resistance elements. The operation switch unit has at least a second conductive state and a second closed state, wherein the operation switch unit is in the second A closed state to disconnect the electrical connection between the waterproof impedance unit and the internal input power terminal and prevent the input voltage of the internal input power terminal from passing through the waterproof impedance unit; and a switching control unit connected to the voltage detection unit. The measurement control unit, the internal input power terminal and the operation switch unit are electrically connected. The switching control unit has at least a first on state and a first off state, wherein the switching control unit can switch the second state of the operation switch unit. On state and second off state, and when the input voltage is greater than the set voltage value, the input voltage can enter the switching control unit through the voltage detection control unit, so that the switching control unit is in the first on state, And switch the operation switch unit to enter the second closed state.

More specifically, the waterproof impedance unit is a plurality of resistive elements connected in series, in parallel, or in series and parallel.

More specifically, the operation switch unit includes at least one switching element, which is a bipolar transistor, a metal oxide semiconductor field effect transistor or a multi-control switching device.

More specifically, the internal input power terminal is electrically connected to an external input power terminal, and a car light switch unit is connected in series between the external input power terminal and the internal input power terminal.

Other technical contents, features and functions of this invention will be clearly presented in the following detailed description of the preferred embodiment with reference to the drawings.

Please refer to Figures 2A, 2B and 2C, which are a schematic diagram of the overall structure of the water impedance operation controller, an external power supply structure diagram and a structure schematic diagram of the waterproof impedance component of this invention. As shown in the figure, the water impedance operation controller includes a The circuit body 4 is a circuit board or an electronic device with a circuit board inside.

The circuit body 4 has at least a voltage detection control unit 42, a switching control unit 43 and a waterproof impedance component 44.

The voltage detection control unit 42 is electrically connected to an internal input power terminal 41 for detecting whether the input voltage of the internal input power terminal 41 is greater than a set voltage value, and when the input voltage is greater than the set voltage value, The input voltage can pass through the voltage detection control unit 42 .

The internal input power terminal 41 is electrically connected to an external input power terminal 1, and a car light switch unit 2 is connected in series between the external input power terminal 1 and the internal input power terminal 41.

The switching control unit 43 is electrically connected to the voltage detection control unit 42, the internal input power terminal 41 and the operation switch unit 441. The switching control unit 43 has at least a first on state and a first off state.

The waterproof impedance component 44 is electrically connected to the internal input power terminal 41. The waterproof impedance component 44 at least includes a waterproof impedance unit 442 and an operation switch unit 441. The waterproof impedance unit 442 has a plurality of resistive elements. The operation switch unit 441 has at least a second on state and a second off state.

The operation switch unit 441 includes at least one switching element, which is a bipolar transistor, a metal oxide semiconductor field effect transistor or a multi-control switching device.

The waterproof impedance unit 442 connects multiple resistive elements in series, parallel, or a mixture of series and parallel.

The switching control unit 43 can switch the second on state and the second off state of the operation switch unit 441, and when the input voltage is greater than the set voltage value, the input voltage can enter the switching through the voltage detection control unit 42 The control unit 43 makes the switching control unit 43 in the first conductive state, and switches the operation switch unit 441 into the second closed state. The second closed state enables the waterproof impedance unit 442 to connect with the internal input power terminal. 41 are electrically disconnected, and the input voltage of the internal input power terminal 41 cannot pass through the waterproof impedance unit 442.

The first implementation circuit of this case is shown in Figure 3. The voltage detection control unit 42 in the embodiment uses the Zener diode D2 as the voltage detection component. The set voltage value is 9V. If the internal input power terminal When the input voltage of 41 is less than 9V, the Zener diode D2 will not conduct, and the transistor Q2 (NPN BJT) of the switching control unit 43 will not conduct. After the input voltage is divided by the resistors R1 and R3, then The field effect transistor Q1 (NMOS) can be turned on, so the input voltage can pass through the waterproof impedance unit 442, so that the car light switch unit 2 can divide the voltage through the waterproof impedance unit 442 to avoid malfunction.

Continuing from the above, when the input voltage of the internal input power terminal 41 is equal to 9V, since the voltage will be attenuated through the component, if the input voltage is equal to 9V, since the voltage is attenuated, it is equivalent to the above situation where the input voltage is less than 9V.

Continuing the above, when the input voltage of the internal input power terminal 41 is greater than 9V, the Zener diode D2 will be turned on. After the voltage is divided by the resistors R2 and R4, the transistor Q2 (NPN BJT) of the switching control unit 43 can be is turned on, so the gate voltage of the field effect transistor Q1 (NMOS) is directly connected to the ground, so the field effect transistor Q1 (NMOS) will be turned off. The waterproof impedance unit 442 is equivalent to an open circuit, so that the waterproof impedance unit can be avoided. 442 consumes too much power and causes parts to overheat.

The first implementation circuit of this case is shown in Figure 4. The voltage detection control unit 42 in the embodiment uses a Zener diode D2 with resistors R2 and R4 as the voltage detection element. The set voltage value of the diode is 9V. If the input voltage of the internal input power terminal 41 is less than 9V, the Zener diode D2 will not conduct, so the transistor Q2 (PNP BJT) of the switching control unit 43 will not conduct, and the input voltage passes through The voltage divided by the resistors R1 and R3 enters the gate of the field effect transistor Q1 (PMOS). At the same time, the input voltage also enters the source through the line. However, since the gate voltage of the field effect transistor Q1 (PMOS) is smaller than the source Therefore, the field effect transistor Q1 (PMOS) is turned on, so the input voltage can pass through the waterproof impedance unit 442, so that the car light switch unit 2 can divide the voltage through the waterproof impedance unit 442 to avoid malfunction.

Continuing from the above, when the input voltage of the internal input power terminal 41 is equal to 9V, since the voltage will be attenuated through the component, if the input voltage is equal to 9V, since the voltage is attenuated, it is equivalent to the above situation where the input voltage is less than 9V.

Continuing from the above, when the input voltage of the internal input power terminal 41 is greater than 9V, the Zener diode D2 will be turned on. After the voltage is divided by the resistors R2 and R4, the base voltage of the transistor Q2 (PNP BJT) must be less than the emitter voltage. , so the transistor Q2 (PNP BJT) of the switching control unit 43 is turned on, so the gate voltage of the field effect transistor Q1 (PMOS) is equal to the input voltage, so the gate voltage of the field effect transistor Q1 (PMOS) is equal to source voltage, so the field effect transistor Q1 (NMOS) will be turned off, and the waterproof impedance unit 442 is equivalent to an open circuit. This will prevent the waterproof impedance unit 442 from consuming too much power and overheating the parts.

It can be seen from the above that the voltage detection control unit 42 can be designed with a variety of components to perform voltage detection and control, and can be adjusted to suit the actual situation. For example, circuit design can be performed using methods such as Zener diodes and resistor voltage dividers. This case can also be used Paired with IC detection for voltage detection and control.

When compared with other conventional technologies, the water impedance operation controller provided by this creation has the following advantages: (1) This case operates the controller through water impedance to detect that when the input voltage is greater than a set voltage value, the input voltage cannot pass through the waterproof impedance unit to avoid overheating due to excessive power consumption. (2) In this case, the detection circuit is mainly used to determine whether the switch is turned on, in order to achieve the purpose of saving power consumption.

The present invention has been disclosed through the above-mentioned embodiments, but this is not intended to limit the present invention. Anyone who is familiar with this technical field and has ordinary knowledge can understand the foregoing technical features and embodiments of the present invention without departing from the scope of the present invention. Some modifications and embellishments may be made within the spirit and scope of this invention. Therefore, the patent protection scope of this invention must be determined by the claims attached to this specification.

1: External input power terminal 2:Car light switch unit 3: Waterproof impedance unit 4:Circuit body 41: Internal input power terminal 42: Voltage detection control unit 43:Switch control unit 44: Waterproof impedance component 441: Operation switch unit 442: Waterproof impedance unit

[Picture 1] is a circuit diagram of a commonly used waterproof impedance. [Figure 2A] is a schematic diagram of the overall structure of the water impedance operation controller of this invention. [Figure 2B] is a schematic diagram of the external power supply structure of the water impedance operation controller of this invention. [Figure 2C] is a schematic diagram of the structure of the waterproof impedance component of the water impedance operation controller of this invention. [Figure 3] is a schematic diagram of the first implementation circuit of the water impedance operation controller of this invention. [Figure 4] is a schematic diagram of the second implementation circuit of the water impedance operation controller of this invention.

4:Circuit body

41: Internal input power terminal

42: Voltage detection control unit

43:Switch control unit

44: Waterproof impedance component

Claims (4)

A water impedance operation controller, the system includes: A circuit body must at least have: A voltage detection control unit is electrically connected to an internal input power terminal for detecting whether the input voltage of the internal input power terminal is greater than a set voltage value, and when the input voltage is greater than the set voltage value, the input The voltage system can detect the control unit through the voltage; A waterproof impedance component is electrically connected to the internal input power terminal. The waterproof impedance component at least includes a waterproof impedance unit and an operation switch unit. The waterproof impedance unit has a plurality of resistive elements. The operation switch unit is at least Having a second conductive state and a second closed state, wherein the operation switch unit is in the second closed state to disconnect the electrical connection between the waterproof impedance unit and the internal input power terminal and enable the internal input power supply The input voltage of the terminal cannot pass through the waterproof impedance unit; and A switching control unit is electrically connected to the voltage detection control unit, the internal input power terminal and the operation switch unit. The switching control unit has at least a first on state and a first off state, wherein the switching control unit The unit can switch the second on state and the second off state of the operating switch unit, and when the input voltage is greater than the set voltage value, the input voltage can enter the switching control unit through the voltage detection control unit, so that the The switching control unit is in the first conductive state and switches the operation switch unit into the second closed state. The water impedance operation controller as described in claim 1, wherein the waterproof impedance unit is a plurality of resistive elements connected in series, parallel or series-parallel. The water impedance operation controller of claim 1, wherein the operation switch unit at least includes one switching element, and the switching element is a bipolar transistor, a metal oxide semiconductor field effect transistor or a multi-control Switchgear. The water impedance operation controller of claim 1, wherein the internal input power terminal is electrically connected to an external input power terminal, and a car light is further connected in series between the external input power terminal and the internal input power terminal. switch unit.

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