CN213547488U

CN213547488U - Single-key multifunctional driving circuit

Info

Publication number: CN213547488U
Application number: CN202023103185.9U
Authority: CN
Inventors: 牛乐乐; 胡智元; 张海
Original assignee: Shenzhen Niuzhuo Technology Co ltd
Current assignee: Shenzhen Niuzhuo Technology Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-06-25
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a multi-functional drive circuit of single bond, include: the voltage stabilizing circuit comprises a key, a first resistor, a second resistor, a third resistor, a fourth resistor, a triode, a PMOS (P-channel metal oxide semiconductor) tube, a first diode and a second diode, wherein the first diode and the second diode are voltage stabilizing diodes, and the triode is an NPN (negative-positive-negative) type triode. The utility model discloses a combination mode of PMOS pipe and triode with mutually support, can realize ingenious control mode for a button can be realized clicking, double click, long functions such as pressing, and circuit cost is lower, and it is more convenient to use.

Description

Single-key multifunctional driving circuit

Technical Field

The utility model relates to the technical field of circuits, especially, relate to a multi-functional drive circuit of single bond.

Background

Many existing electronic devices have fewer and fewer keys, and thus a single key needs to be able to implement multiple functions to implement flexible control functions.

SUMMERY OF THE UTILITY MODEL

The utility model aims at satisfying current demand, realizing multiple control effect on single button, providing a single bond multifunctional drive circuit.

The technical scheme of the utility model as follows: the utility model provides a multi-functional drive circuit of single bond, include: the resistor comprises a key, a first resistor, a second resistor, a third resistor, a fourth resistor, a triode, a PMOS (P-channel metal oxide semiconductor) tube, a first diode and a second diode, wherein the first diode and the second diode are voltage stabilizing diodes, the triode is an NPN (negative-positive-negative) triode, one end of the first resistor is electrically connected with the PG1 end, one end of the first resistor is electrically connected with one end of the second resistor and the base of the triode respectively, the emitter of the triode and the other end of the second resistor are grounded, the collector of the triode is electrically connected with the anode of the second diode, one end of the fourth resistor and the grid of the PMOS tube respectively, the source of the PMOS tube is electrically connected with the VCC end, the drain of the PMOS tube and the other end of the fourth resistor are electrically connected with the VCC12V end, the cathode of the second diode is electrically connected with the cathode of the first diode and one end of the key respectively, the other end ground connection of button, the positive pole of first diode respectively with the one end of third resistance, PG2 end electric connection, the other end and the VCC3.3 end electric connection of third resistance.

Furthermore, the model of the PMOS tube is IRF 7304.

Further, the model of the triode is S8050.

Further, the first diode and the second diode are both SS14 in model.

Adopt above-mentioned scheme, the utility model discloses a combination mode and the mutually supporting of PMOS pipe and triode can realize ingenious control mode for a button can be realized clicking, double click, long functions such as pressing, and circuit cost is lower, and it is more convenient to use.

Drawings

Fig. 1 is a schematic circuit diagram according to an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, in the present embodiment, the present invention provides a single-key multifunctional driving circuit, including: the circuit comprises a key S1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a triode Q1, a PMOS (P-channel metal oxide semiconductor) tube Q2, a first diode Z1 and a second diode Z2. The triode Q1 is an NPN type triode Q1, and the model is S8050. The model of the PMOS tube Q2 is IRF 7304. The first diode Z1 and the second diode Z2 are both zener diodes, and are both SS14 in model. One end of the first resistor R1 is electrically connected with the PG1 end, one end of the first resistor R1 is electrically connected with one end of the second resistor R2 and the base of the triode Q1 respectively, the emitter of the triode Q1 and the other end of the second resistor R2 are both grounded, the collector of the triode Q1 is electrically connected with the anode of the second diode Z2, one end of the fourth resistor R4 and the gate of the PMOS transistor Q2, the source electrode of the PMOS tube Q2 is electrically connected with a VCC end, the drain electrode of the PMOS tube Q2 and the other end of the fourth resistor R4 are both electrically connected with a VCC12V end, the cathode of the second diode Z2 is electrically connected to the cathode of the first diode Z1 and one end of the key S1 respectively, the other end ground connection of button S1, the positive pole of first diode Z1 respectively with one end, PG2 end electric connection of third resistance R3, the other end and the VCC3.3 end electric connection of third resistance R3.

Referring to fig. 1, in the present disclosure, when the circuit is used in an electronic device, the PG1 terminal and the PG2 terminal may be connected to a main control module, which is used as two detection points to detect that the key S1 is pressed. The key S1 in the circuit can be used in electronic equipment to realize the functions of starting, closing, clicking, double clicking, long pressing and the like. The startup function is realized by controlling the on-off of the PMO tube, and the specific principle of realizing the long-press startup function can be as follows: before the key S1 is not pressed, the voltage at the two ends of the gate and the source of the PMOS transistor Q2 is the same, the PMOS transistor Q2 is not turned on, after the key S1 is pressed, the gate of the PMOS transistor Q2 is grounded through the first diode Z1, the PMOS transistor Q2 is turned on, the 12V voltage at the VCC12V end is from the PMOS transistor Q2 to the VCC end to supply power to the rear stage, after the system of the electronic device is operated, the level at the PG1 end can be pulled high to turn on the triode Q1, the gate of the PMOS transistor Q2 is pulled low, and even if the key S1 is released, the PMOS transistor Q2 can still be turned on, so that the long-press startup function can be realized. The specific principle of the key S1 for implementing click, double click and long press functions may be as follows: when the key S1 is pressed, the PG2 is grounded through the second diode Z2, when the key S1 is released, the PG2 is pulled back to a high level, the main control module of the electronic device can detect the short press, the long press, the double-click and other functions of the key S1 through the state of the PG2, and after the electronic device is turned on, the electronic device can judge whether to implement other functions or turn off the electronic device according to the time for pressing the key S1. When the key S1 is pressed for a long time to realize shutdown, the principle may be: when the power-off device is powered off, the level of the PG1 end is pulled down, when the key S1 is loosened, the triode Q1 and the PMOS tube Q2 are in a cut-off state, and a power supply at the VCC12V end cannot reach the VCC end, so that the long-time power-off function is realized. It should be noted that the present solution is an improvement on the key circuit, and does not relate to an improvement on a software method, and the functions of level detection, level control, and the like corresponding to the PG1 terminal and the PG2 terminal when the key circuit is used can be implemented by any existing technology capable of implementing the corresponding functions.

In conclusion, the combination mode and the mutual cooperation of the PMOS tube and the triode can realize an ingenious control mode, so that the functions of clicking, double clicking, long pressing and the like can be realized by one key, the circuit cost is lower, and the practicability is more convenient.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A single-bond multifunctional driving circuit is characterized by comprising: the resistor comprises a key, a first resistor, a second resistor, a third resistor, a fourth resistor, a triode, a PMOS (P-channel metal oxide semiconductor) tube, a first diode and a second diode, wherein the first diode and the second diode are voltage stabilizing diodes, the triode is an NPN (negative-positive-negative) triode, one end of the first resistor is electrically connected with the PG1 end, one end of the first resistor is electrically connected with one end of the second resistor and the base of the triode respectively, the emitter of the triode and the other end of the second resistor are grounded, the collector of the triode is electrically connected with the anode of the second diode, one end of the fourth resistor and the grid of the PMOS tube respectively, the source of the PMOS tube is electrically connected with the VCC end, the drain of the PMOS tube and the other end of the fourth resistor are electrically connected with the VCC12V end, the cathode of the second diode is electrically connected with the cathode of the first diode and one end of the key respectively, the other end ground connection of button, the positive pole of first diode respectively with the one end of third resistance, PG2 end electric connection, the other end and the VCC3.3 end electric connection of third resistance.

2. The single bond multifunctional driver circuit of claim 1, wherein the PMOS transistor is model IRF 7304.

3. The single bond multifunctional driver circuit of claim 2, wherein said transistor is of type S8050.

4. The single bond multifunctional driver circuit as claimed in any one of claims 1 to 3, wherein said first and second diodes are both SS14 model.