Handshake circuit for interaction of emergency power supply and driving power supply

Abstract

The utility model provides a handshake circuit for interaction of an emergency power supply and a driving power supply, the handshake circuit is arranged in the emergency power supply, the handshake circuit comprises a data sending line and a data receiving line, and the data sending line and the data receiving line are connected with the driving power supply through a communication interface; the data sending line and the data receiving line share one connecting line with the direct-current power supply; the direct-current power supply is connected to the handshake circuit after being rectified and filtered by the capacitor, and is connected to the communication interface, so that double-wire communication is realized, the number of connecting wires is small, and installation errors are avoided.

Description

Technical Field

[0001] This utility model relates to the field of power supply devices, specifically a handshake circuit for interaction between an emergency power supply and a drive power supply. Background Technology

[0002] Electrical equipment is often equipped with emergency power supplies and driver power supplies. For example, LED lights are equipped with emergency power supplies so that the lights can be used in case of power failure. The emergency power supply and the driver power supply need to communicate with each other to adjust the power.

[0003] In existing technologies, emergency power supplies and drive power supplies typically communicate via bus communication, with communication lines and power lines often being separate. This requires four or more connecting lines between the emergency power supply and the drive power supply. Obviously, a large number of connecting lines leads to complex assembly issues. Furthermore, communication between emergency power supplies and drive power supplies from different brands is often incompatible. Therefore, there is an urgent need for a handshake circuit for interaction between emergency power supplies and drive power supplies to solve the above problems. Utility Model Content

[0004] In view of the technical problems in the prior art, such as the large number of communication connection lines between emergency power supplies and drive power supplies, which are difficult to assemble and often incompatible, this utility model provides a solution.

[0005] Specifically, this utility model provides a handshake circuit for interaction between an emergency power supply and a driving power supply. The handshake circuit is located within the emergency power supply and includes a data transmission line and a data reception line. The data transmission line and the data reception line are connected to the driving power supply through a communication interface. The data transmission line and the data reception line share a connection line with the DC power supply. The DC power supply is rectified and filtered by a capacitor before being connected to the handshake circuit and the communication interface.

[0006] Preferably, the data transmission line includes a first MOSFET (QP13) and a first transistor (QP8); the gate of the first MOSFET (QP13) is connected to the TX1 pin of the emergency power supply, the source is connected to the VDD power supply, and the drain is coupled to the base of the first transistor (QP8); the emitter of the first transistor (QP8) is grounded, and the collector is coupled to pin 2 of the communication interface (CON8) after being connected in series with a first resistor (RP44), and is also connected to a +12V power supply.

[0007] Preferably, a second resistor (RP38) is connected in parallel between the base and emitter of the first transistor (QP8), and a first diode (DP8) and a first Zener diode (ZD3) are connected in series between the collector of the first transistor (QP8) and the +12V power supply.

[0008] Preferably, the receiving data line includes a second MOSFET (QP12) and a second transistor (QP7); the gate of the second MOSFET (QP12) is coupled to pin 2 of the communication interface (CON8), the source is connected to a +12V power supply, and the drain is coupled to the base of the second transistor (QP7); the emitter of the second transistor (QP7) is connected to pin 1 of the communication interface (CON8), the collector is connected to the RX1 pin of the emergency power supply, and a third resistor (RP39) is connected in series to the VDD power supply.

[0009] Preferably, a fourth resistor (RP40) is connected in parallel between the base and emitter of the second transistor (QP7).

[0010] Preferably, the +12V power supply is coupled to pin 1 of the communication interface (CON8), and the first capacitor (CP26) is connected between the +12V power supply and ground.

[0011] Preferably, the device includes a second diode (DP7), the cathode of which is coupled to pin 2 of the communication interface (CON8), and the anode of which is coupled to the collector of a third transistor (QP11). The emitter of the third transistor (QP11) is connected in series with a fifth resistor (RP59) and then coupled to the cathode of the third diode (DP6). The base of the third transistor (QP11) is connected in series with a sixth resistor (RP58) and then grounded, and is also connected to the collector of a fourth transistor (QP10). The base of the fourth transistor (QP10) is connected between the fifth resistor (RP59) and the emitter of the third transistor (QP11), and the emitter is coupled to the anode of the third diode (DP6), and is also connected to a +12V power supply.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the handshake circuit for interaction between an emergency power supply and a driving power supply provided by this utility model includes an emergency power supply and a driving power supply, as well as a data transmission line and a data reception line connected to the emergency power supply. The data transmission line and the data reception line are connected to the driving power supply through a communication interface. The data transmission line and the data reception line share a connection line with the DC power supply. The DC power supply is connected to the handshake circuit after being rectified and filtered by a capacitor, and is also connected to the communication interface. The DC power supply, as the working power supply, shares a connection line with the communication signal, realizing two-line communication. The number of connection lines is reduced, and installation errors will not occur. It is also suitable for communication between various emergency power supplies and driving power supplies. Attached Figure Description

[0013] Figure 1 This is a circuit block diagram of the present invention;

[0014] Figure 2 This is a handshake circuit diagram of the present invention; Detailed Implementation

[0015] To more clearly illustrate this utility model, the following description, in conjunction with the accompanying drawings, will provide a further picture.

[0016] Please see Figure 1-2 This invention provides a handshake circuit for interaction between an emergency power supply and a driving power supply. The handshake circuit is located within the emergency power supply and includes a data transmission line and a data reception line. The data transmission line and the data reception line are connected to the driving power supply via a communication interface. The data transmission line and the data reception line share a single connection line with the DC power supply. The DC power supply is rectified and filtered by a capacitor before being connected to the handshake circuit and the communication interface. The communication signal and the operating power supply share a single connection line, greatly reducing the number of connection lines between the driving power supply and the emergency power supply. Typically, the handshake circuit of this invention is integrated into the emergency power supply. When used with different models of driving power supplies, only the plug matching the driving power supply needs to be replaced for connection, resulting in high compatibility.

[0017] In specific embodiments, such as Figure 2 As shown, the data transmission line includes a first MOSFET (QP13) and a first transistor (QP8). The gate of the first MOSFET (QP13) is connected to the TX1 pin of the emergency power supply, the source is connected to the VDD power supply, and the drain is coupled to the base of the first transistor (QP8). The emitter of the first transistor (QP8) is grounded, and the collector is coupled to pin 2 of the communication interface (CON8) after being connected in series with the first resistor (RP44), and is also connected to a +12V power supply. Obviously, when the emergency power supply sends data to the driving power supply, the signal enters the circuit through TX1, changing the on / off state of the first MOSFET (QP13), thereby changing the high / low level of the first transistor (QP8), thus generating a square wave with high and low levels in the PROG2 terminal. The data can be read by driving the power supply through pin 2 of the communication interface (CON8).

[0018] Furthermore, such as Figure 2 As shown, a second resistor (RP38) is connected in parallel between the base and emitter of the first transistor (QP8). A first diode (DP8) and a first Zener diode (ZD3) are connected in series between the collector of the first transistor (QP8) and the +12V power supply. The second resistor (RP38) can provide a stable bias current to reduce temperature-induced changes. The second resistor (RP38) forms a negative feedback, making the base current of the first transistor (QP8) more stable. This is because the voltage drop across the second resistor (RP38) will compensate for some of the effects of temperature changes, thereby maintaining a stable collector current. The first diode (DP8) and the first Zener diode (ZD3) also play a role in stabilizing and protecting the signal in the circuit, while simultaneously stabilizing the voltage and limiting the current to prevent excessive voltage from damaging circuit components.

[0019] In specific embodiments, such as Figure 2 As shown, the data receiving line includes a second MOSFET (QP12) and a second transistor (QP7). The gate of the second MOSFET (QP12) is coupled to pin 2 of the communication interface (CON8), the source is connected to a +12V power supply, and the drain is coupled to the base of the second transistor (QP7). The emitter of the second transistor (QP7) is connected to pin 1 of the communication interface (CON8), and the collector is connected to the RX1 pin of the emergency power supply. At the same time, a third resistor (RP39) is connected in series to the VDD power supply. It can be seen that when the driving power supply wants to send data to the emergency power supply, the data generates a high-low level through the PROG2 terminal, thereby changing the on / off state of the second MOSFET (QP12), and thus changing the switch of QP7. This will generate a square wave at the RX1 terminal. The emergency power supply can receive the data transmitted by the driving power supply by reading this square wave.

[0020] In the above embodiments, TX1 and RX1 are both connected to the corresponding pins on the main control chip of the emergency power supply.

[0021] Similarly, a fourth resistor (RP40) is connected in parallel between the base and emitter of the second transistor (QP7) to enhance the stability of the current in the circuit and accelerate the consumption of base charge, allowing the transistor to switch from the on state to the off state more quickly. This helps to reduce switching time and improve the switching speed and efficiency of the circuit.

[0022] In a specific embodiment, the +12V power supply is coupled to pin 1 of the communication interface (CON8), and the first capacitor (CP26) is connected between the +12V power supply and ground. The 12V DC power supply generated by rectification and filtering in the entire handshake circuit provides the working power for the entire handshake circuit, and at the same time provides the drive power through pin 1 of the communication interface (CON8).

[0023] like Figure 2 As shown, in practical use, considering that the connecting line may be very long, in order to increase the load capacity of the circuit, this embodiment also includes a second diode (DP7). The cathode of the second diode is coupled to pin 2 of the communication interface (CON8), and the anode is coupled to the collector of the third transistor (QP11). The emitter of the third transistor (QP11) is connected in series with the fifth resistor (RP59) and then coupled to the cathode of the third diode (DP6). The base is connected in series with the sixth resistor (RP58) and then grounded, and is also connected to the collector of the fourth transistor (QP10). The base of the fourth transistor (QP10) is connected between the fifth resistor (RP59) and the emitter of the third transistor (QP11), and the emitter is coupled to the anode of the third diode (DP6), and is also connected to a +12V power supply; forming a constant current circuit to provide a stable current to ensure the stable operation of the handshake circuit.

[0024] In this embodiment, when the mains power is disconnected, the emergency power supply sends a 4 Hz square wave signal to the drive power supply. After receiving the signal, the drive power supply switches to emergency power supply. When the mains power is restored, the emergency power supply sends a 1 Hz square wave signal to the drive power supply. After receiving the signal, the drive power supply switches to drive power supply. In this embodiment, the duty cycle of the square wave signal is 20%.

[0025] The advantages of this utility model are:

[0026] 1) The DC power supply and the handshake circuit share a single connection wire, which greatly reduces the number of connection wires and simplifies installation.

[0027] 2) A resistor is connected in parallel with the first and second transistors, and a diode and a Zener diode are connected in series in the circuit to ensure the stability of the circuit current and signal.

[0028] 3) A constant current circuit is provided to keep the voltage and current constant, improve the load and stability of the circuit, and allow the length of the connecting wires to be set to be longer.

[0029] The above-disclosed embodiments are only a few specific examples of this utility model. However, this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A handshake circuit for interaction between an emergency power supply and a drive power supply, characterized in that, The handshake circuit is located within the emergency power supply. The handshake circuit includes a data transmission line and a data reception line, which are connected to the drive power supply via a communication interface. The data transmission line and the data reception line share a single connection line with the DC power supply. The DC power supply is rectified and filtered by a capacitor before being connected to the handshake circuit and the communication interface.

2. The handshake circuit for interaction between an emergency power supply and a drive power supply according to claim 1, characterized in that, The data transmission line includes a first MOSFET (QP13) and a first transistor (QP8); the gate of the first MOSFET (QP13) is connected to the TX1 pin of the emergency power supply, the source is connected to the VDD power supply, and the drain is coupled to the base of the first transistor (QP8); the emitter of the first transistor (QP8) is grounded, and the collector is coupled to pin 2 of the communication interface (CON8) after being connected in series with a first resistor (RP44), and is also connected to a +12V power supply.

3. The handshake circuit for interaction between an emergency power supply and a drive power supply according to claim 2, characterized in that, A second resistor (RP38) is connected in parallel between the base and emitter of the first transistor (QP8), and a first diode (DP8) and a first Zener diode (ZD3) are connected in series between the collector of the first transistor (QP8) and the +12V power supply.

4. The handshake circuit for interaction between emergency power supply and drive power supply according to claim 1, characterized in that, The data receiving line includes a second MOSFET (QP12) and a second transistor (QP7); the gate of the second MOSFET (QP12) is coupled to pin 2 of the communication interface (CON8), the source is connected to a +12V power supply, and the drain is coupled to the base of the second transistor (QP7); the emitter of the second transistor (QP7) is connected to pin 1 of the communication interface (CON8), the collector is connected to the RX1 pin of the emergency power supply, and a third resistor (RP39) is connected in series to the VDD power supply.

5. The handshake circuit for interaction between an emergency power supply and a drive power supply according to claim 4, characterized in that, A fourth resistor (RP40) is connected in parallel between the base and emitter of the second transistor (QP7).

6. The handshake circuit for interaction between an emergency power supply and a drive power supply according to claim 1, characterized in that, The +12V power supply is coupled to pin 1 of the communication interface (CON8), and the first capacitor (CP26) is connected between the +12V power supply and ground.

7. The handshake circuit for interaction between an emergency power supply and a drive power supply according to claim 6, characterized in that, The device includes a second diode (DP7), whose cathode is coupled to pin 2 of the communication interface (CON8), and whose anode is coupled to the collector of a third transistor (QP11). The emitter of the third transistor (QP11) is connected in series with a fifth resistor (RP59) and then coupled to the cathode of the third diode (DP6). The base of the third transistor (QP11) is connected in series with a sixth resistor (RP58) and then grounded, and is also connected to the collector of a fourth transistor (QP10). The base of the fourth transistor (QP10) is connected between the fifth resistor (RP59) and the emitter of the third transistor (QP11), and the emitter is coupled to the anode of the third diode (DP6), and is also connected to a +12V power supply.

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