A power supply driving circuit inputting a wide voltage range

Abstract

The application provides a power supply driving circuit for inputting a wide voltage range, comprising a DC-DC wide voltage conversion module, a DC-AC conversion module, a light driving module and an atomization driving module, the DC-DC wide voltage conversion module is connected with a power input end, the output end of the DC-DC wide voltage conversion module is connected with the DC-AC conversion module, the DC-AC conversion module is connected with a light load through the light driving module, the DC-AC conversion module is connected with an atomization load through the atomization driving module, the input power supply is converted in voltage through the DC-DC conversion module and the DC-AC conversion module, the input power supply voltage is adjusted to the working voltage of the load, so that the light driving module drives the light load to work and the atomization driving module drives the atomization load to work. The power supply driving circuit for inputting a wide voltage range can be applied to a wide input voltage range, and can basically meet the required power supply voltage of household through the DC-DC wide voltage conversion module and the DC-AC conversion module, thereby solving the limitation of the input voltage.

Description

Technical Field

[0001] This invention belongs to the field of power drive circuit technology, and in particular relates to a power drive circuit with a wide input voltage range. Background Technology

[0002] Current power drive circuits have limitations in input voltage. A product can only use a power adapter with a corresponding voltage, such as a 5V, 9V, 12V, or 18V power adapter. This means that a product can only be used with one power adapter, which increases its operating cost and can also cause the product to malfunction or burn out due to using the wrong power adapter. At the same time, existing power drive circuits have limited functionality and cannot adequately meet practical needs. Therefore, this patent application designs a power drive circuit with a wide input voltage range. Summary of the Invention

[0003] In view of this, the present invention aims to provide a power supply drive circuit with a wide input voltage range, in order to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A power drive circuit with a wide input voltage range includes a DC-DC wide voltage conversion module, a DC-AC conversion module, a lighting drive module, and a fogging drive module. The DC-DC wide voltage conversion module is connected to the power input terminal, and the output terminal of the DC-DC wide voltage conversion module is connected to the DC-AC conversion module. The DC-AC conversion module is connected to a lighting load through the lighting drive module, and the DC-AC conversion module is connected to a fogging load through the fogging drive module. The input power supply undergoes voltage conversion through the DC-DC conversion module and the DC-AC conversion module, adjusting the input power supply voltage to the operating voltage of the load, so that the lighting drive module drives the lighting load and the fogging drive module drives the fogging load.

[0006] Furthermore, the DC-DC wide voltage conversion module includes a main control chip U2, the input pin of the main control chip U2 is connected to a DC power socket DC1, the DC power socket DC1 is connected to the input power supply, and the output pin of the main control chip U2 is connected to the DC-AC conversion module.

[0007] The DC-DC wide voltage conversion module is also connected to a filter module and a voltage divider resistor module. The filter circuit is used to filter the input power supply voltage, and the voltage divider resistor module is used to adjust the power supply voltage output by the DC-DC wide voltage conversion module.

[0008] Furthermore, the voltage divider resistor module includes resistors R16, R17, R18, R19, R20, and R21, and the filter module includes capacitors C1, C9, C10, and C12.

[0009] The VFB pin of the main control chip U2 is connected to resistor R17, resistor R18 and capacitor C6 respectively. The other end of resistor R17 is grounded, the other end of resistor R18 is connected to the power output point VDD, and the other end of capacitor C6 is connected to resistor R21. The other end of resistor R21 is also connected to the power output point VDD.

[0010] The CSN pin of the main control chip U2 is connected to the power output point VDD. The CSP pin of the main control chip U2 is connected to resistors R19, R20 and inductor L1. The other ends of resistors R19 and R20 are connected to the power output point VDD. The other end of inductor L1 is connected to the SW pin of the main control chip U2.

[0011] The SW pin of the main control chip U2 is grounded through resistor R16 and capacitor C7 in sequence;

[0012] The GND pin of the main control chip U2 is connected to the power output point VDD through capacitors C9 and C12, respectively. The GND pin of the main control chip U2 is also grounded.

[0013] Furthermore, the VIN pin of the main control chip U2 is also connected to the auxiliary power interface J1, which is connected to an external input power supply as an auxiliary power backup.

[0014] The two pins of the auxiliary power interface J1 are connected to capacitors C1 and C10 respectively, and the other ends of capacitors C1 and C10 are grounded.

[0015] Pin 1 of the auxiliary power interface J1 is connected to the DC power socket DC1, and pin 1 of the auxiliary power interface J1 is also connected to ground.

[0016] Furthermore, the DC-AC conversion module includes a self-excited oscillation circuit, which includes a conversion chip U1. The VDD pin of the conversion chip U1 is connected to the power output point VDD through a resistor R4. The PB0 pin of the conversion chip U1 is connected to a resistor R3. The other end of the resistor R3 is connected to a transistor Q8. The emitter of the transistor Q8 is grounded. The collector of the transistor Q8 is connected to a diode D2. The anode of the diode D2 is connected to a capacitor C2, a resistor R1, and a resistor R2. The other end of the capacitor C2 is connected to a step-up transformer T1. The other end of the resistor R1 is connected to a capacitor C3 and a transistor Q1. The emitter of the transistor Q1 is connected to the step-up transformer T1 through a fuse F1. The collector of the transistor Q1 is connected to a capacitor C3, a resistor R2, and a resistor R4.

[0017] Pin 7 of the step-up transformer T1 is connected to the lighting driver module through resistors R6 and R14 connected in parallel. Pin 7 of the step-up transformer T1 is also connected to capacitor C4, and the other end of capacitor C4 is grounded.

[0018] Furthermore, the lighting load includes an EL cold light sheet and an LED light strip. The lighting driving module includes a driving branch one. The output pin of the main control chip U1 is connected to the flashing port through the driving branch one. The flashing port is connected to the LED light strip. The main control chip U1 controls the LED light strip to flash.

[0019] It also includes one or more drive branches two. The output pins of the main control chip U1 are connected to the drive branch two. The main control chip U1 is connected to the EL cold light sheet through the drive branch two to control the EL cold light sheet to emit light.

[0020] Furthermore, the drive branch includes a resistor R13. One end of the resistor R13 is connected to the PA3 pin of the main control chip U1, and the other end of the resistor R13 is connected to a transistor Q9. The collector of the transistor Q9 is connected to the flashing port J2, and the flashing port J2 is connected to the LED strip.

[0021] The second driving branch includes a resistor and a bidirectional trigger diode connected to the resistor. The other end of the resistor is connected to the main control chip U1, and the bidirectional trigger diode is connected to the EL cold light sheet.

[0022] Furthermore, the atomization driving module includes a MOS switch Q7 and a triangular inductor L2. The gate of the MOS switch Q7 is connected to the PB2 pin of the main control chip U1, and the drain of the MOS switch Q7 is connected to the atomization port L2 through the triangular inductor L2. The atomization port J2 is connected to an external atomizing sheet.

[0023] The gate of the MOS switch Q7 is connected to a resistor R12, the other end of which is grounded, and the source of the MOS switch Q7 is grounded.

[0024] Furthermore, it also includes multiple parallel-connected constant voltage power output ports connected to the power output point VDD, with corresponding external spare parts connected to the constant voltage power output ports.

[0025] Compared with the prior art, the power supply drive circuit with a wide input voltage range described in this invention has the following advantages:

[0026] (1) The power drive circuit with a wide input voltage range described in this invention can be applied to a wide input voltage range. After passing through the DC-DC wide voltage conversion module and the DC-AC conversion module, it can basically meet the power supply voltage required by households and solve the limitation of input voltage.

[0027] The power drive circuit is multifunctional. It connects to the light load through the light drive module and to the atomization load through the atomization drive module. The light load can enhance the display effect and grade of the sign light / LOGO light, and the atomization circuit drives the microporous atomizing sheet to spray out mist to achieve humidification and air purification.

[0028] (2) The power drive circuit with a wide input voltage range described in this invention satisfies the diverse output requirements. By utilizing the set peripheral circuit interface, it can not only meet the basic lighting function, but also meet the power needs of conventional electrical appliances, thus realizing more output requirements. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is a power supply drive circuit diagram with a wide input voltage range according to an embodiment of the present invention;

[0031] Figure 2 This is a circuit diagram of the constant voltage power supply output port according to an embodiment of the present invention;

[0032] Figure 3 This is a circuit diagram of the peripheral spare parts described in an embodiment of the present invention. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Please see Figure 1 As shown, a power supply driving circuit with a wide input voltage range includes a DC-DC wide voltage conversion module, a DC-AC conversion module, a lighting driving module, and a fogging driving module. The DC-DC wide voltage conversion module is connected to the power input terminal, and the output terminal of the DC-DC wide voltage conversion module is connected to the DC-AC conversion module. The DC-AC conversion module is connected to a lighting load through the lighting driving module, and the DC-AC conversion module is connected to a fogging load through the fogging driving module. The input power supply undergoes voltage conversion through the DC-DC conversion module and the DC-AC conversion module, adjusting the input power supply voltage to the operating voltage of the load, so that the lighting driving module drives the lighting load and the fogging driving module drives the fogging load.

[0038] This patent application can meet the wide range of power supply voltages from DC4.5V to 18V input through the DC1 and J1 interfaces. Through the control chip U2, it can achieve precise constant voltage and constant current droop DC-DC conversion, so that the CSN pin of the main control chip U2 outputs the power supply voltage required by the downstream circuit to be VDD4.5V-5.3V, and the maximum output current can reach 3.4A, which can meet the load requirements of the downstream circuit. The circuit has short circuit protection, overheat protection and overvoltage protection functions.

[0039] With the 5V voltage provided by the CSN pin of chip U2, the self-excited oscillation circuit boosts the DC 5V voltage to AC 90-110V, providing the AC power required by the EL electroluminescent film to enable the electroluminescent film to light up.

[0040] The atomization function is achieved by the output of a frequency of about 108KHZ with a duty cycle of about 30% from pin PB2 of the main control chip U1, which controls the complete drive circuit composed of field effect transistors Q7, R12, L2, and C11 to realize the spray function of the atomizing plate.

[0041] The control frequency output from pin PA3 of the control chip U1 is used to achieve the blinking output of the LED light, so as to meet the output effect of the LED light.

[0042] The DC-DC wide voltage conversion module includes a main control chip U2. The input pin of the main control chip U2 is connected to a DC power socket DC1, which is connected to the input power supply. The output pin of the main control chip U2 is connected to the DC-AC conversion module.

[0043] The DC-DC wide voltage conversion module is also connected to a filter module and a voltage divider resistor module. The filter circuit is used to filter the input power supply voltage, and the voltage divider resistor module is used to adjust the power supply voltage output by the DC-DC wide voltage conversion module.

[0044] The voltage divider resistor module includes resistors R16, R17, R18, R19, R20, and R21; the filter module includes capacitors C1, C9, C10, and C12.

[0045] The VFB pin of the main control chip U2 is connected to resistor R17, resistor R18 and capacitor C6 respectively. The other end of resistor R17 is grounded, the other end of resistor R18 is connected to the power output point VDD, and the other end of capacitor C6 is connected to resistor R21. The other end of resistor R21 is also connected to the power output point VDD.

[0046] The CSN pin of the main control chip U2 is connected to the power output point VDD. The CSP pin of the main control chip U2 is connected to resistors R19, R20 and inductor L1. The other ends of resistors R19 and R20 are connected to the power output point VDD. The other end of inductor L1 is connected to the SW pin of the main control chip U2.

[0047] The SW pin of the main control chip U2 is grounded through resistor R16 and capacitor C7 in sequence;

[0048] The GND pin of the main control chip U2 is connected to the power output point VDD through capacitors C9 and C12, respectively. The GND pin of the main control chip U2 is also grounded.

[0049] The VIN pin of the main control chip U2 is also connected to the auxiliary power interface J1, which is connected to an external input power supply as an auxiliary power backup.

[0050] The two pins of the auxiliary power interface J1 are connected to capacitors C1 and C10 respectively, and the other ends of capacitors C1 and C10 are grounded.

[0051] Pin 1 of the auxiliary power interface J1 is connected to the DC power socket DC1, and pin 1 of the auxiliary power interface J1 is also connected to ground.

[0052] The DC-AC conversion module includes a self-excited oscillation circuit, which includes a conversion chip U1. The conversion chip U1 can be programmed with specific pins according to actual needs. The VDD pin of the conversion chip U1 is connected to the power output point VDD through resistor R4. The PB0 pin of the conversion chip U1 is connected to resistor R3. The other end of resistor R3 is connected to transistor Q8. The emitter of transistor Q8 is grounded. The collector of transistor Q8 is connected to diode D2. The anode of diode D2 is connected to capacitor C2, resistor R1, and resistor R2. The other end of capacitor C2 is connected to step-up transformer T1. The other end of resistor R1 is connected to capacitor C3 and transistor Q1. The emitter of transistor Q1 is connected to step-up transformer T1 through fuse F1. The collector of transistor Q1 is connected to capacitor C3, resistor R2, and resistor R4.

[0053] The 7th pin of the step-up transformer T1 is connected to the lighting driver module through resistors R6 and R14 connected in parallel. The 7th pin of the step-up transformer T1 is also connected to capacitor C4, and the other end of capacitor C4 is grounded.

[0054] The self-excited oscillation circuit described above can convert a DC 3-5V DC voltage into an AC 90-110V AC voltage through self-excited oscillation and transformer step-up transformation, thereby providing the AC drive power required for the EL electroluminescent film.

[0055] The lighting load includes an EL cold light sheet and an LED light strip. The lighting driver module includes a driver branch one. The output pin of the main control chip U1 is connected to the flashing port through the driver branch one. The flashing port is connected to an external LED light strip. The main control chip U1 controls the LED light strip to flash.

[0056] It also includes one or more drive branches two. The output pins of the main control chip U1 are connected to the drive branch two. The main control chip U1 is connected to the EL light-emitting sheet through the drive branch two to control the EL light-emitting sheet to emit light. The circuit has the function of driving the EL sheet and can display LOGO lights, sign lights, key sign displays and other animation displays, all of which can be realized through the EL light-emitting sheet circuit. The lighting mode of the light-emitting sheet can be controlled by the output frequency of pins 1, 2, 3, 13 and 14 of the main control chip U1 to control the circuit to realize the light-emitting effect of the EL light-emitting sheet (such as constant light, flashing, or jumping functions to meet the required effect).

[0057] The first driving branch includes resistor R13. One end of resistor R13 is connected to pin PA3 of the main control chip U1, and the other end of resistor R13 is connected to transistor Q9. The collector of transistor Q9 is connected to the flashing port J2, and the flashing port J2 is connected to the LED strip. By adjusting the control frequency output by the control chip U1, the flashing output of the LED strip or the desired lighting effect such as gradual brightening and dimming can be achieved. The output effect can be adjusted as required.

[0058] Drive branch two includes a resistor and a bidirectional trigger diode connected to the resistor. The other end of the resistor is connected to the main control chip U1, and the bidirectional trigger diode is connected to the EL (Elastic Optical Array) chip. This patent application uses five branches two as an example, each connected to a 5-pin EL chip, such as resistor R7 and bidirectional trigger diode Q2 connected to resistor R7. The other end of resistor R7 is connected to pin PB6 of the main control chip U1, and the other end of bidirectional trigger diode Q2 is connected to terminal 1 of the EL chip. Here, only the branch containing R7 is explained; the other branches will not be described in detail. Please refer to the appendix for specific circuit diagrams. Figure 1 .

[0059] The atomization driving module includes a MOS switch Q7 and a triangular inductor L2. The gate of the MOS switch Q7 is connected to the PB2 pin of the main control chip U1, and the drain of the MOS switch Q7 is connected to the atomization port L2 through the triangular inductor L2. The atomization port J2 is connected to an external atomizing sheet.

[0060] The gate of the MOS switch Q7 is also connected to a resistor R12, the other end of which is grounded, and the source of the MOS switch Q7 is grounded.

[0061] The circuit has an atomization function and can be applied in enclosed spaces (such as a main restaurant). The atomization circuit drives the microporous atomizing plate to spray out mist to achieve indoor air humidification and air freshening.

[0062] like Figure 2 As shown, it also includes multiple parallel-connected constant voltage power output ports, such as interfaces J3, J4, and J5, connected to the power output point VDD. These constant voltage power output ports are connected to corresponding peripheral components, such as… Figure 3 As shown, multiple other peripheral circuit interfaces can be set to achieve diversified lighting functions, basically meeting the required lighting functions, while also meeting the power needs of conventional electrical appliances, such as motor devices, etc.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power supply drive circuit with a wide input voltage range, characterized in that: It includes a DC-DC wide voltage conversion module, a DC-AC conversion module, a lighting driver module, and a misting driver module. The DC-DC wide voltage conversion module is connected to the power input terminal, and its output terminal is connected to the DC-AC conversion module. The DC-AC conversion module is connected to a lighting load through the lighting driver module, and the DC-AC conversion module is connected to a misting load through the misting driver module. The input power supply undergoes voltage conversion through the DC-DC and DC-AC conversion modules, adjusting the input power voltage to the operating voltage of the load, so that the lighting driver module drives the lighting load and the misting driver module drives the misting load. The DC-DC wide voltage conversion module includes a main control chip U2. The input pin of the main control chip U2 is connected to a DC power socket DC1, which is connected to the input power supply. The output pin of the main control chip U2 is connected to the DC-AC conversion module. The DC-DC wide voltage conversion module is also connected to a filter module and a voltage divider resistor module. The filter module is used to filter the input power supply voltage, and the voltage divider resistor module is used to adjust the power supply voltage output by the DC-DC wide voltage conversion module. The voltage divider resistor module includes resistors R16, R17, R18, R19, R20 and R21, and the filter module includes capacitors C1, C9, C10 and C12. The VFB pin of the main control chip U2 is connected to resistor R17, resistor R18 and capacitor C6 respectively. The other end of resistor R17 is grounded, the other end of resistor R18 is connected to the power output point VDD, and the other end of capacitor C6 is connected to resistor R21. The other end of resistor R21 is also connected to the power output point VDD. The CSN pin of the main control chip U2 is connected to the power output point VDD. The CSP pin of the main control chip U2 is connected to resistors R19 and R20 and inductor L1. The other ends of resistors R19 and R20 are connected to the power output point VDD. The other end of inductor L1 is connected to the SW pin of the main control chip U2. The SW pin of the main control chip U2 is grounded through resistor R16 and capacitor C7 in sequence; The GND pin of the main control chip U2 is connected to the power output point VDD through capacitors C9 and C12 respectively, and the GND pin of the main control chip U2 is also grounded. The DC-AC conversion module includes a self-excited oscillation circuit, which includes a conversion chip U1. The VDD pin of the conversion chip U1 is connected to the power output point VDD through a resistor R4. The PB0 pin of the conversion chip U1 is connected to a resistor R3. The other end of the resistor R3 is connected to a transistor Q8. The emitter of the transistor Q8 is grounded. The collector of the transistor Q8 is connected to a diode D2. The anode of the diode D2 is connected to a capacitor C2, a resistor R1, and a resistor R2. The other end of the capacitor C2 is connected to a step-up transformer T1. The other end of the resistor R1 is connected to a capacitor C3 and a transistor Q1. The emitter of the transistor Q1 is connected to the step-up transformer T1 through a fuse F1. The collector of the transistor Q1 is connected to a capacitor C3, a resistor R2, and a resistor R4. Pin 7 of the step-up transformer T1 is connected to the lighting driver module through resistors R6 and R14 connected in parallel. Pin 7 of the step-up transformer T1 is also connected to capacitor C4, and the other end of capacitor C4 is grounded.

2. The power supply drive circuit with a wide input voltage range according to claim 1, characterized in that: The VIN pin of the main control chip U2 is also connected to the auxiliary power interface J1, which is connected to an external input power supply as an auxiliary power backup. The two pins of the auxiliary power interface J1 are connected to capacitors C1 and C10 respectively, and the other ends of capacitors C1 and C10 are grounded. Pin 1 of the auxiliary power interface J1 is connected to the DC power socket DC1, and pin 1 of the auxiliary power interface J1 is also connected to ground.

3. The power supply drive circuit with a wide input voltage range according to claim 1, characterized in that: The lighting load includes an EL cold light sheet and an LED light strip. The lighting driver module includes a driver branch one. The output pin of the main control chip U1 is connected to the flashing port through the driver branch one. The flashing port is connected to the LED light strip. The main control chip U1 controls the LED light strip to flash. It also includes one or more drive branches two. The output pins of the main control chip U1 are connected to the drive branch two. The main control chip U1 is connected to the EL cold light sheet through the drive branch two to control the EL cold light sheet to emit light.

4. The power supply drive circuit with a wide input voltage range according to claim 3, characterized in that: The first driving branch includes resistor R13. One end of resistor R13 is connected to the PA3 pin of the main control chip U1, and the other end of resistor R13 is connected to transistor Q9. The collector of transistor Q9 is connected to the flashing port J2, and the flashing port J2 is connected to the LED light strip. The second driving branch includes a resistor and a bidirectional trigger diode connected to the resistor. The other end of the resistor is connected to the main control chip U1, and the bidirectional trigger diode is connected to the EL cold light sheet.

5. The power supply drive circuit with a wide input voltage range according to claim 1, characterized in that: The atomization driving module includes a MOS switch Q7 and a triangular inductor L2. The gate of the MOS switch Q7 is connected to the PB2 pin of the main control chip U1, and the drain of the MOS switch Q7 is connected to the atomization port L2 through the triangular inductor L2. The atomization port J2 is connected to an external atomizing sheet. The gate of the MOS switch Q7 is also connected to a resistor R12, the other end of which is grounded, and the source of the MOS switch Q7 is grounded.

6. The power supply drive circuit with a wide input voltage range according to claim 1, characterized in that: It also includes multiple parallel-connected constant voltage power output ports connected to the power output point VDD, and the constant voltage power output ports are connected to external spare parts.

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