Digital chip control circuit

Abstract

The utility model provides a digital chip control circuit, which comprises a digital chip, the digital chip is respectively in bidirectional connection with a switch rectification circuit, an auxiliary power supply circuit and a serial port, and the digital chip circuit is used for controlling the switch rectification circuit, the auxiliary power supply circuit and the serial port. The input end of the switch rectification circuit is connected with an external AC power supply, the output end of the switch rectification circuit is connected with a BAT positive electrode and a BAT negative electrode, the switch rectification circuit is used for converting AC voltage into DC voltage and outputting the DC voltage to the BAT positive electrode and the BAT negative electrode, the auxiliary power supply circuit is used for supplying power to the digital chip, and the serial port is used for controlling switch rectification through the digital chip. The size of the switch rectification output current is controlled, a digital circuit is adopted to replace an existing analog circuit, the occupied area is small, the power is large, the output range can be adjusted, and the matching degree is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electricity, and more specifically, to a digital chip control circuit. Background Art

[0002] Since the product has a wide output range (such as 48V-72V), and existing products cannot meet the multi-range output requirements, different conversion products need to be matched according to different ranges, which greatly increases the conversion cost, and mostly uses analog circuits and is large in size.

[0003] In view of this, the utility model proposes a digital chip control circuit which occupies a small area and is flexible to match. Utility Model Content

[0004] In view of this, the utility model proposes a digital chip control circuit which occupies a small area and is flexible to match.

[0005] A digital chip control circuit comprises a digital chip circuit, a switch rectifier circuit, an auxiliary power supply circuit, and a serial port, wherein the digital chip circuit comprises a digital chip, the digital chip is bidirectionally connected to the switch rectifier circuit, the auxiliary power supply circuit, and the serial port, respectively, the digital chip circuit is used to control the switch rectifier circuit, the auxiliary power supply circuit, and the serial port, the input end of the switch rectifier circuit is connected to an external AC power supply, the output end of the switch rectifier circuit is connected to a positive electrode of a BAT and a negative electrode of a BAT, respectively, the switch rectifier circuit is used to convert an AC voltage into a DC voltage and output it to the positive electrode of a BAT and the negative electrode of a BAT, the auxiliary power supply circuit is used to power the digital chip, and the serial port is used to control the switch rectifier circuit through the digital chip to control the magnitude of the output current of the switch rectifier circuit.

[0006] Furthermore, the switching rectifier circuit includes a first rectifier circuit and a second rectifier circuit, both of which are bidirectionally connected to a digital chip, and the digital chip is used to detect and control the first rectifier circuit and the second rectifier circuit. The input end of the first rectifier circuit is connected to an external AC power supply, and the first rectifier circuit is used to rectify and filter the AC voltage into a DC voltage for power supply. The output end of the first rectifier circuit is connected to the input end of the second rectifier circuit, and the output end of the second rectifier circuit is connected to the positive electrode of BAT and the negative electrode of BAT. The second rectifier circuit is used to perform secondary rectification and filtering on the circuit after rectification by the first rectifier circuit and output it to the positive electrode of BAT and the negative electrode of BAT.

[0007] Furthermore, the first rectifier circuit includes a fuse F1, a thermistor RT1, a rectifier bridge diode D1, a capacitor C1, a MOS tube Q2, a MOS tube Q4, and a transformer T1. The rectifier bridge diode D1 has four connection points. The external AC power supply is connected to the first connection point of the rectifier bridge diode D1 through the fuse F1. The fuse F1 plays a role in protecting the circuit. The second connection point of the rectifier bridge diode D1 is respectively connected to the input end of the MOS tube Q2, the input end of the MOS tube Q4, and the third connection point of the rectifier bridge diode D1. The output end of the MOS tube Q2 and the output end of the MOS tube Q4 are connected to the primary side of the transformer T1, and the secondary side of the transformer T1 is connected to the input end of the second rectifier circuit. The fourth connection point of the rectifier bridge diode D1 is connected to the external AC power supply of the rectifier bridge diode D1 through the thermistor RT1. The thermistor RT1 plays a role in protecting the circuit. The resistance specification of the fuse F1 is 250V, the current specification is 15A, and the model of the thermistor RT1 is 3D-20.

[0008] Furthermore, the gate of the MOS tube Q2 is also connected to the OUTA pin of the digital chip, and the gate of the MOS tube Q4 is also connected to the OUTB pin of the digital chip. The digital chip controls the duty cycle of the MOS tube Q2 and the MOS tube Q4 through the OUTA pin and the OUTB pin, thereby changing the output voltage of the first rectifier circuit.

[0009] Furthermore, a capacitor C1 is connected between the second connection point of the rectifier bridge diode D1 and the third connection point of the rectifier bridge diode D1 , and the capacitor C1 plays a filtering role.

[0010] Furthermore, the primary side of the transformer T1 is also connected to the pin 3 of the digital chip for detecting the primary side voltage.

[0011] Furthermore, the second rectifier circuit includes a rectifier diode D2, an inductor L6, an inductor L7, a relay K4, and a relay K3. The secondary side of the transformer T1 is connected to the positive electrode of BAT and the negative electrode of BAT respectively through the rectifier diode D2. The two ends of the rectifier diode D2 are respectively provided with inductors L6 and L7 near the positive electrode of BAT and the negative electrode of BAT. The inductors L6 and L7 play a filtering role. One end of the rectifier diode D2 is provided with relays K4 and K3. Relays K4 and K3 are connected to pin 1 of the digital chip. The digital chip reduces BMI by outputting digital signals to relays K4 and K3.

[0012] Furthermore, resistors R19 and R18 are provided between the relays K4 and K3 and the positive electrode of BAT. Resistors R18 are provided at both ends of the resistor R19. The resistors R19 and R18 are used to absorb peak voltage.

[0013] In some implementations, one end of the inductor L7 is also connected to pin 2 of the digital chip for current detection at the end of the inductor L7.

[0014] In some embodiments, the secondary power supply circuit includes a power chip, a transformer T4, and an LDO chip. One end of the first rectifier circuit is connected to the input end of the power chip, the output end of the power chip is connected to the output end of the LDO chip through the transformer T4, and the output end of the LDO chip is connected to the digital chip. The power chip model is EG1125, and the LDO chip model is 3.3v linear regulator-CJT1117B3.3.

[0015] Beneficial effects of the utility model: The utility model proposes a digital chip control circuit, the digital chip circuit includes a digital chip, the digital chip is bidirectionally connected to the switch rectifier circuit, the auxiliary power supply circuit, and the serial port respectively, the digital chip circuit is used to control the switch rectifier circuit, the auxiliary power supply circuit, and the serial port, the input end of the switch rectifier circuit is connected to the external AC power supply, the output end of the switch rectifier circuit is connected to the BAT positive electrode and the BAT negative electrode respectively, the switch rectifier circuit is used to convert the AC voltage into a DC voltage and output it to the BAT positive electrode and the BAT negative electrode, the auxiliary power supply circuit is used to power the digital chip, the serial port is used to control the switch rectifier circuit through the digital chip, and control the size of the switch rectifier output current. The digital circuit is used to replace the existing analog circuit, which occupies a small area, has high power, and can adjust the output range to improve the matching degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a digital chip control circuit of the present application.

[0017] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0018] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0019] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0020] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0021] A digital chip control circuit comprises a digital chip circuit, a switch rectifier circuit, an auxiliary power supply circuit, and a serial port, wherein the digital chip circuit comprises a digital chip, the digital chip is bidirectionally connected to the switch rectifier circuit, the auxiliary power supply circuit, and the serial port, respectively, the digital chip circuit is used to control the switch rectifier circuit, the auxiliary power supply circuit, and the serial port, the input end of the switch rectifier circuit is connected to an external AC power supply, the output end of the switch rectifier circuit is connected to a positive electrode of a BAT and a negative electrode of a BAT, respectively, the switch rectifier circuit is used to convert an AC voltage into a DC voltage and output it to the positive electrode of a BAT and the negative electrode of a BAT, the auxiliary power supply circuit is used to power the digital chip, and the serial port is used to control the switch rectifier circuit through the digital chip to control the magnitude of the output current of the switch rectifier circuit.

[0022] The switching rectifier circuit includes a first rectifier circuit and a second rectifier circuit. Both the first rectifier circuit and the second rectifier circuit are bidirectionally connected to a digital chip. The digital chip is used to detect and control the first rectifier circuit and the second rectifier circuit. The input end of the first rectifier circuit is connected to an external AC power supply. The first rectifier circuit is used to rectify and filter the AC voltage into a DC voltage for power supply. The output end of the first rectifier circuit is connected to the input end of the second rectifier circuit. The output end of the second rectifier circuit is connected to the positive electrode of BAT and the negative electrode of BAT. The second rectifier circuit is used to perform secondary rectification and filtering on the circuit after rectification of the first rectifier circuit and output it to the positive electrode of BAT and the negative electrode of BAT.

[0023] The first rectifier circuit includes a fuse F1, a thermistor RT1, a rectifier bridge diode D1, a capacitor C1, a MOS tube Q2, a MOS tube Q4, and a transformer T1. The rectifier bridge diode D1 has four connection points. The external AC power supply is connected to the first connection point of the rectifier bridge diode D1 through the fuse F1. The fuse F1 plays a role in protecting the circuit. The second connection point of the rectifier bridge diode D1 is respectively connected to the input end of the MOS tube Q2, the input end of the MOS tube Q4, and the third connection point of the rectifier bridge diode D1. The output end of the MOS tube Q2 and the output end of the MOS tube Q4 are connected to the primary side of the transformer T1, and the secondary side of the transformer T1 is connected to the input end of the second rectifier circuit. The fourth connection point of the rectifier bridge diode D1 is connected to the external AC power supply of the rectifier bridge diode D1 through the thermistor RT1. The thermistor RT1 plays a role in protecting the circuit. The resistance specification of the fuse F1 is 250V, the current specification is 15A, and the model of the thermistor RT1 is 3D-20.

[0024] The gate of the MOS tube Q2 is also connected to the OUTA pin of the digital chip, and the gate of the MOS tube Q4 is also connected to the OUTB pin of the digital chip. The digital chip controls the duty ratio of the MOS tubes Q2 and Q4 through the OUTA pin and the OUTB pin, thereby changing the output voltage of the first rectifier circuit.

[0025] A capacitor C1 is further connected between the second connection point of the rectifier bridge diode D1 and the third connection point of the rectifier bridge diode D1 , and the capacitor C1 plays a filtering role.

[0026] The primary side of the transformer T1 is also connected to the 3rd pin of the digital chip for detecting the primary side voltage.

[0027] The second rectifier circuit includes a rectifier diode D2, an inductor L6, an inductor L7, a relay K4, and a relay K3. The secondary side of the transformer T1 is connected to the positive electrode of BAT and the negative electrode of BAT respectively through the rectifier diode D2. The two ends of the rectifier diode D2 are respectively provided with inductors L6 and L7 near the positive electrode of BAT and the negative electrode of BAT. The inductors L6 and L7 play a filtering role. One end of the rectifier diode D2 is provided with relays K4 and K3. Relays K4 and K3 are connected to pin 1 of the digital chip. The digital chip reduces BMI by outputting digital signals to relays K4 and K3.

[0028] Resistors R19 and R18 are also provided between the relays K4 and K3 and the positive electrode of BAT. Resistors R18 are provided at both ends of the resistor R19. The resistors R19 and R18 are used to absorb peak voltage.

[0029] One end of the inductor L7 is also connected to the pin 2 of the digital chip for current detection at the end of the inductor L7.

[0030] The auxiliary power supply circuit includes a power chip, a transformer T4, and an LDO chip. One end of the first rectifier circuit is connected to the input end of the power chip, the output end of the power chip is connected to the output end of the LDO chip through the transformer T4, and the output end of the LDO chip is connected to the digital chip. The power chip model is EG1125, and the LDO chip model is 3.3v linear regulator-CJT1117B3.3.

[0031] Beneficial effects of the utility model: The utility model proposes a digital chip control circuit, the digital chip circuit includes a digital chip, the digital chip is bidirectionally connected to the switch rectifier circuit, the auxiliary power supply circuit, and the serial port respectively, the digital chip circuit is used to control the switch rectifier circuit, the auxiliary power supply circuit, and the serial port, the input end of the switch rectifier circuit is connected to the external AC power supply, the output end of the switch rectifier circuit is connected to the BAT positive electrode and the BAT negative electrode respectively, the switch rectifier circuit is used to convert the AC voltage into a DC voltage and output it to the BAT positive electrode and the BAT negative electrode, the auxiliary power supply circuit is used to power the digital chip, the serial port is used to control the switch rectifier circuit through the digital chip, and control the size of the switch rectifier output current. The digital circuit is used to replace the existing analog circuit, which occupies a small area, has high power, and can adjust the output range to improve the matching degree.

[0032] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A digital chip control circuit, comprising a digital chip circuit, a switch rectifier circuit, a secondary power supply circuit, and a serial port, characterized in that: The digital chip circuit includes a digital chip, which is bidirectionally connected to a switching rectifier circuit, an auxiliary power supply circuit, and a serial port, respectively. The digital chip circuit is used to control the switching rectifier circuit, the auxiliary power supply circuit, and the serial port. The input end of the switching rectifier circuit is connected to an external AC power supply, and the output end of the switching rectifier circuit is connected to a positive electrode of BAT and a negative electrode of BAT, respectively. The switching rectifier circuit is used to convert an AC voltage into a DC voltage and output it to the positive electrode of BAT and the negative electrode of BAT. The auxiliary power supply circuit is used to power the digital chip, and the serial port is used to control the switching rectifier circuit through the digital chip to control the magnitude of the output current of the switching rectifier circuit.

2. The digital chip control circuit according to claim 1, characterized in that: The switching rectifier circuit includes a first rectifier circuit and a second rectifier circuit. Both the first rectifier circuit and the second rectifier circuit are bidirectionally connected to a digital chip. The digital chip is used to detect and control the first rectifier circuit and the second rectifier circuit. The input end of the first rectifier circuit is connected to an external AC power supply. The first rectifier circuit is used to rectify and filter the AC voltage into a DC voltage for power supply. The output end of the first rectifier circuit is connected to the input end of the second rectifier circuit. The output end of the second rectifier circuit is connected to the positive electrode of BAT and the negative electrode of BAT. The second rectifier circuit is used to perform secondary rectification and filtering on the circuit after rectification of the first rectifier circuit and output it to the positive electrode of BAT and the negative electrode of BAT.

3. The digital chip control circuit according to claim 2, characterized in that: The first rectifier circuit includes a fuse F1, a thermistor RT1, a rectifier bridge diode D1, a capacitor C1, a MOS tube Q2, a MOS tube Q4, and a transformer T1. The rectifier bridge diode D1 has four connection points. The external AC power supply is connected to the first connection point of the rectifier bridge diode D1 through the fuse F1. The fuse F1 plays a role in protecting the circuit. The second connection point of the rectifier bridge diode D1 is respectively connected to the input end of the MOS tube Q2, the input end of the MOS tube Q4, and the third connection point of the rectifier bridge diode D1. The output end of the MOS tube Q2 and the output end of the MOS tube Q4 are connected to the primary side of the transformer T1. The secondary side of the transformer T1 is connected to the input end of the second rectifier circuit. The fourth connection point of the rectifier bridge diode D1 is connected to the external AC power supply of the rectifier bridge diode D1 through the thermistor RT1. The thermistor RT1 plays a role in protecting the circuit. The resistance specification of the fuse F1 is 250V, the current specification is 15A, and the model of the thermistor RT1 is 3D-20.

4. The digital chip control circuit according to claim 3, characterized in that: The gate of MOS tube Q2 is also connected to the OUTA pin of the digital chip, and the gate of MOS tube Q4 is also connected to the OUTB pin of the digital chip. The digital chip controls the duty ratio of MOS tube Q2 and MOS tube Q4 through the OUTA pin and OUTB pin, thereby changing the output voltage of the first rectifier circuit.

5. The digital chip control circuit according to claim 3, characterized in that: A capacitor C1 is further connected between the second connection point of the rectifier bridge diode D1 and the third connection point of the rectifier bridge diode D1 , and the capacitor C1 plays a filtering role.

6. The digital chip control circuit according to claim 3, characterized in that: The primary side of transformer T1 is also connected to pin 3 of the digital chip for detecting the primary side voltage.

7. The digital chip control circuit according to claim 1, characterized in that: The second rectifier circuit includes a rectifier diode D2, an inductor L6, an inductor L7, a relay K4, and a relay K3. The secondary side of the transformer T1 is connected to the positive electrode of BAT and the negative electrode of BAT respectively through the rectifier diode D2. The two ends of the rectifier diode D2 are respectively provided with inductors L6 and L7 near the positive electrode of BAT and the negative electrode of BAT. The inductors L6 and L7 play a filtering role. One end of the rectifier diode D2 is provided with relays K4 and K3. Relays K4 and K3 are connected to pin 1 of the digital chip. The digital chip reduces BMI by outputting digital signals to relays K4 and K3.

8. The digital chip control circuit according to claim 7, characterized in that: Resistors R19 and R18 are also provided between relays K4 and K3 and connected to the positive electrode of BAT. Resistors R18 are provided at both ends of resistor R19. Resistors R19 and R18 are used to absorb peak voltage.

9. The digital chip control circuit according to claim 1, characterized in that: One end of the inductor L7 is also connected to pin 2 of the digital chip for current detection at the end of the inductor L7.

10. The digital chip control circuit according to claim 1, characterized in that: The auxiliary power supply circuit includes a power chip, a transformer T4, and an LDO chip. One end of the first rectifier circuit is connected to the input end of the power chip, the output end of the power chip is connected to the output end of the LDO chip through the transformer T4, and the output end of the LDO chip is connected to the digital chip. The power chip model is EG1125, and the LDO chip model is 3.3v linear regulator-CJT1117B3.3.

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