CN110661412A - A surge circuit and antenna ESC controller - Google Patents

Abstract

The invention provides a surge circuit and an antenna ESC controller, the technical solution of which is that the surge circuit includes an electronic switch module, an energy storage module, a variable resistance module and a switching power supply module, and the variable resistance module and the electronic switch module The input end is connected to the external voltage input end, one end of the energy storage module is connected to the switching power supply module and the other end is grounded, the output ends of the electronic switch module and the variable resistance module are respectively connected to the energy storage module, so The energy storage module is used to delay power-on of the switching power supply module, and the variable resistance module is used to output a constant current charging current. By setting the variable resistance module, the power-on surge current is not affected by the input voltage, output voltage and energy storage module, the power-on time is stable, and the effect of power-on current stability is achieved.

Description

A surge circuit and antenna ESC controller

technical field

The invention relates to the field of surge circuit design, in particular to a surge circuit and an antenna electrical adjustment controller.

Background technique

The existing standard antenna interface 3.0 protocol ESC controller has the problem of power-on inrush current during the power-on process of the switching power supply, and the power-on current is unstable, resulting in unstable power-on time and long power-on time.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide a surge circuit with stable power-on current.

Another object of the present invention is to provide an antenna ESC controller using the above surge circuit.

In order to achieve the above object, the present invention provides the following technical solutions:

A surge circuit includes an electronic switch module, an energy storage module, a variable resistance module and a switching power supply module, wherein the input ends of the variable resistance module and the electronic switch module are connected to an external voltage input end, and one end of the energy storage module is connected to an external voltage input end. The switching power supply module is connected and the other end thereof is grounded, the output ends of the electronic switching module and the variable resistance module are respectively connected with an energy storage module, and the energy storage module is used for delaying power-on of the switching power supply module, The variable resistance module is used to output a constant current charging current.

Further setting: the surge circuit further includes a delay module, the delay module is connected between the external voltage input terminal and the electronic switch module, and the delay module is used to delay the conduction of the electronic switch module .

Further setting: the surge circuit further includes a voltage regulator module, the voltage regulator module is connected between the external voltage input terminal and the delay module, and the voltage regulator module is used to provide a reference voltage for the delay module .

Further setting: the voltage regulator module includes a first resistor and a voltage regulator diode connected in series with each other, the positive electrode of the voltage regulator diode is grounded, and the two ends of the first resistor are respectively connected to the external voltage input terminal and the negative electrode of the voltage regulator diode. connected, the output end of the voltage regulator module is connected between the voltage regulator diode and the first resistor.

Further setting: the delay module includes a second resistor and a first capacitor, the second resistor is connected to the output end of the voltage regulator module, one end of the first capacitor is grounded, and the other end is connected to the second resistor , the output end of the delay module is connected between the second resistor and the first capacitor.

Further setting: the variable resistance module includes a third resistor, a fourth resistor, a first triode and a second triode, the collector of the first triode and the input end of the variable resistance module connection, the two ends of the third resistor are respectively connected to the collector and base of the first triode, the emitter of the first triode is connected to the fourth resistor, and the fourth resistor is far away from the first three One end of the transistor is grounded, the base of the second transistor is connected between the emitter of the first transistor and the fourth resistor, and the collector of the second transistor is connected to the Between the base of the first triode and the third resistor, the emitter of the second triode is connected to the output end of the variable resistance module, the first triode and the second The triode is a PNP type triode.

Further setting: the electronic switch module includes a MOS tube, a fifth resistor, a sixth resistor and a third triode, the base of the third triode is connected to the output end of the delay module, and its collector is Connected with the sixth resistor and its emitter is grounded, the fifth resistor is connected between the external voltage input terminal and the sixth resistor, and the source of the MOS tube is connected between the fifth resistor and the external voltage input terminal , its drain is connected between the variable resistance module and the energy storage module, its gate is connected between the fifth resistor and the sixth resistor, the MOS tube is a P-channel MOS tube, and the third triode It is an NPN transistor.

Further setting: the switching power supply module includes a voltage stabilizer chip, and also includes a third capacitor, one end of the third capacitor is grounded, and the other end of the third capacitor is electrically connected to the enabling end of the voltage stabilizer chip, and the voltage stabilizer chip has an electrical connection. The voltage input terminal is connected with the output terminal of the variable resistance module.

The present invention also provides an antenna ESC controller, including the above-mentioned surge circuit.

Compared with the prior art, the scheme of the present invention has the following advantages:

1. In the surge circuit involved in the present invention, by setting a variable resistance module, the power-on surge current is not affected by the input voltage, output voltage and energy storage module, the power-on time is stable, and the effect of power-on current stability is achieved. .

2. In the antenna ESC controller involved in the present invention, by using the above-mentioned surge circuit, the antenna ESC controller can meet the AISG3.0 power-on surge current requirements during the power-on process, the power-on current is stable, and the performance is improved. Work stability.

Additional aspects and advantages of the present invention will be set forth in part in the following description, which will be apparent from the following description, or may be learned by practice of the present invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a frame diagram of a surge circuit according to an embodiment of the present invention;

2 is a circuit schematic diagram of a surge circuit according to an embodiment of the present invention;

FIG. 3 is a working flowchart of a surge circuit according to an embodiment of the present invention.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

As shown in FIG. 1 and FIG. 2, the present invention provides an antenna ESC controller, including a surge circuit, the surge circuit includes an electronic switch module 1, a delay module 2, a voltage regulator module 3, and an energy storage module 4. The variable resistance module 5 and the switching power supply module 6, the input terminals of the voltage regulator module 3, the variable resistance module 5 and the electronic switch module 1 are connected to the external voltage input terminal. One end of the energy storage module 4 is connected to the switching power supply module 6 and the other end is grounded. The output ends of the electronic switch module 1 and the variable resistance module 5 are respectively connected to the energy storage module 4. The voltage stabilization module 3 is connected to an external voltage input terminal, and the delay module 2 is connected between the voltage regulator module 3 and the electronic switch module 1 . The energy storage module 4 is used to delay the power-on of the electronic switch module 1, the variable resistance module 5 is used to output a constant current charging current, and the delay module 2 is used to delay the conduction of the electronic switch module 1. The voltage regulator module 3 is used to provide the reference voltage for the delay module 2 .

In this embodiment, the voltage stabilizing module 3 includes a first resistor R1 and a zener diode D1 connected in series with each other, the positive electrode of the zener diode D1 is grounded, and the two ends of the first resistor R1 are respectively connected to an external voltage input terminal It is connected with the negative electrode of the zener diode D1, and the output end of the voltage stabilizing module 3 is connected between the zener diode D1 and the first resistor R1.

The delay module 2 includes a second resistor R2 and a first capacitor C1, the third capacitor C3 is connected to the output end of the voltage regulator module 3, one end of the first capacitor C1 is grounded, and the other end is connected to the other end. The second resistor R2 is connected, and the output end of the delay module 2 is connected between the second resistor R2 and the first capacitor C1. The delay module 2 plays the role of delay, and the electronic switch module 1 is turned on after a period of time delay after power-on.

The variable resistance module 5 includes a third resistor R3, a fourth resistor R4, a first transistor Q1 and a second transistor Q2, and the collector of the first transistor Q1 is connected to the variable resistance module. 5 is connected to the input terminal of 5, the two ends of the third resistor R3 are respectively connected to the collector and base of the first transistor Q1, and the emitter of the first transistor Q1 is connected to the fourth resistor R4, so One end of the fourth resistor R4 away from the first transistor Q1 is grounded, and the base of the second transistor Q2 is connected between the emitter of the first transistor Q1 and the fourth resistor R4, The collector of the second transistor Q2 is connected between the base of the first transistor Q1 and the third resistor R3, and the emitter of the second transistor Q2 is connected to the adjustable resistor. At the output end of the variable resistance module 5, the first transistor Q1 and the second transistor Q2 are PNP transistors.

The electronic switch module 1 includes a MOS transistor Q3, a fifth resistor R5, a sixth resistor R6 and a third transistor Q4, the base of the third transistor Q4 is connected to the output end of the delay module 2 , its collector is connected to the sixth resistor R6 and the emitter of the third transistor Q4 is grounded, the fifth resistor R5 is connected between the external voltage input terminal and the sixth resistor R6, the source of the MOS transistor Q3 Connected between the fifth resistor R5 and the external voltage input terminal, the drain of the MOS transistor Q3 is connected between the variable resistance module 5 and the energy storage module 4, and the gate of the MOS transistor Q3 is connected to the fifth resistor R5 and the sixth between resistor R6. In this embodiment, the MOS transistor Q3 is a P-channel MOS transistor Q3, and the third transistor Q4 is an NPN transistor.

In this embodiment, the energy storage module 4 includes a second capacitor C2, one end of the second capacitor C2 is grounded, and the other end of the second capacitor C2 is connected to the drain of the MOS transistor Q3, and its typical value is 1-10000μF.

In this embodiment, the switching power supply module 6 includes a voltage regulator chip 61 and a third capacitor C3 , one end of the third capacitor C3 is grounded, and the other end of the third capacitor C3 is connected to the enabling end of the voltage regulator chip 61 . , the voltage input terminal of the voltage regulator chip 61 is connected to the output terminal of the variable resistance module 5 . In this embodiment, the third capacitor C3 is a switching power supply delay enabling capacitor. When the delay time of the switching power supply module 6 is greater than the delay time of the delay module 2, the switching power supply module 6 starts to output.

The switching power supply module 6 also includes a fourth capacitor C4, one end of the fourth capacitor C4 is grounded, and the other end of the fourth capacitor C4 is connected to the soft start end of the voltage regulator chip 61, which is used to set the time for the soft start of the switching power supply module 6, The soft-start time is determined by the magnitude of the inrush current.

Combining with Fig. 3, the working flow of the surge circuit is shown. When the power is turned on, the second capacitor C2 is charged first. When the second capacitor C2 is fully charged, the MOS transistor Q3 is turned on, the switching power supply is enabled, and the The final startup is complete.

In this embodiment, after the second capacitor C2 is fully charged, the MOS transistor Q3 is turned on. Since the external input voltage passes through the Zener diode D1, the conduction of the MOS transistor Q3 is not affected by the input voltage and the discrete coefficient of the MOS transistor Q3 itself. , the conduction time of MOS tube Q3 is relatively stable, and it can be turned on for up to 200ms after power-on.

The above are only some embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. A surge circuit is characterized in that: the energy storage module is used for enabling the switch power supply module to be powered on in a delayed mode, and the variable resistance module is used for outputting constant-current charging current.

2. The surge circuit of claim 1, wherein: the electronic switch module is connected between the external voltage input end and the electronic switch module, and the delay module is used for delaying the conduction of the electronic switch module.

3. The surge circuit of claim 2, wherein: the voltage stabilizing module is connected between the external voltage input end and the time delay module and used for providing reference voltage for the time delay module.

4. A surge circuit according to claim 3, wherein: the voltage stabilizing module comprises a first resistor and a voltage stabilizing diode which are connected in series, the anode of the voltage stabilizing diode is grounded, two ends of the first resistor are respectively connected with an external voltage input end and the cathode of the voltage stabilizing diode, and the output end of the voltage stabilizing module is connected between the voltage stabilizing diode and the first resistor.

5. The surge circuit of claim 4, wherein: the time delay module comprises a second resistor and a first capacitor, the second resistor is connected with the output end of the voltage stabilizing module, one end of the first capacitor is grounded, the other end of the first capacitor is connected with the second resistor, and the output end of the time delay module is connected between the second resistor and the first capacitor.

6. The surge circuit of claim 5, wherein: the variable resistance module comprises a third resistor, a fourth resistor, a first triode and a second triode, wherein a collector of the first triode is connected with an input end of the variable resistance module, two ends of the third resistor are respectively connected with a collector and a base of the first triode, an emitter of the first triode is connected with the fourth resistor, one end of the fourth resistor, far away from the first triode, is grounded, a base of the second triode is connected between the emitter of the first triode and the fourth resistor, a collector of the second triode is connected between the base of the first triode and the third resistor, an emitter of the second triode is connected with an output end of the variable resistance module, and the first triode and the second triode are PNP type triodes.

7. The surge circuit of claim 5, wherein: the electronic switch module comprises an MOS (metal oxide semiconductor) tube, a fifth resistor, a sixth resistor and a third triode, wherein the base of the third triode is connected with the output end of the delay module, the collector of the third triode is connected with the sixth resistor, the emitter of the third triode is grounded, the fifth resistor is connected with an external voltage input end and between the sixth resistor, the source of the MOS tube is connected between the fifth resistor and the external voltage input end, the drain of the MOS tube is connected between the variable resistor module and the energy storage module, the grid of the MOS tube is connected between the fifth resistor and the sixth resistor, the MOS tube is a P-channel MOS tube, and the third triode is an NPN-type triode.

8. The surge circuit of claim 1, wherein: the switching power supply module comprises a voltage stabilizing chip and a third capacitor, one end of the third capacitor is grounded, the other end of the third capacitor is electrically connected with an enabling end of the voltage stabilizing chip, and a voltage input end of the voltage stabilizing chip is connected with an output end of the variable resistance module.

9. An antenna electrically tuning controller is characterized in that: comprising a surge circuit as claimed in any of the claims 1 to 8.

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