Circuit for controlling graded simulation reference voltage by adopting DAC (Digital-to-Analog Converter) data flow
By using a DAC data stream to control a graded analog reference voltage circuit, and utilizing components such as a DAC chip, transistors, and resistor networks, the problem of traditional ballasts being unable to match various lamp light sources is solved. This achieves circuit versatility and flexibility, reduces product model and management costs, and simplifies operation.
Patent Information
- Application Number
- CN202520032682.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Traditional electronic ballasts have complex circuits, many components, poor consistency and reliability, and are difficult to match with multiple lamp light sources at the same time, resulting in many product models, high inventory, high cost and complicated operation.
The circuit uses DAC data stream control to control the stepped analog reference voltage. It utilizes a DAC digital-to-analog converter chip, transistors, optocouplers, and resistor networks to generate different analog voltages through SDA and SCL signal data streams, thereby changing the circuit parameters to adapt to different lamp light sources.
It enables electronic ballasts to match various lamp light sources, reduces product models, lowers inventory and production costs, improves versatility and ease of use, and simplifies operation procedures.
Smart Images
Figure CN223809937U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic circuit technical field especially relates to a circuit that adopts DAC data stream control grading analog reference voltage. BACKGROUND
[0002] In the application field of ultraviolet lamp electronic ballast, or the application field of electronic ballast of other gas discharge lamp, due to the characteristics of the lamp, a kind of electronic ballast needs to match multiple lamp light sources simultaneously, to reduce the model variety of product, reduce the inventory of each model, increase the versatility and flexibility of product, so ON / OFF dial switch needs to be set on electronic ballast to facilitate setting different preheating current and working current.
[0003] The traditional solution is to use the operational amplifier of the circuit inside the special electronic ballast special chip to adjust the working frequency of main circuit by controlling different reference of operational amplifier, and the deficiency is that the circuit is very complex, there are many components, consistency is not good, and reliability is not high. SUMMARY
[0004] The utility model discloses a kind of circuit that adopts DAC data stream control grading analog reference voltage, for realizing the matching of different lamp light sources.
[0005] In order to achieve the above object, the utility model provides the following technical scheme:
[0006] A kind of circuit that adopts DAC data stream control grading analog reference voltage, comprising:
[0007] Signal input processing module, the signal output processing module includes SDA and SCL signal end, the SDA and SCL signal end are used to receive data;
[0008] Voltage regulation control module, the voltage regulation control module includes the control chip U1, triode Q1 and photoelectric coupler connected in turn, the control chip U1 is connected with the SDA and SCL signal end, for generating analog voltage according to the input data and outputting the analog voltage from PIN1 pin, the analog voltage is used to drive the triode Q1, and affect the conduction depth of photoelectric coupler connected with the triode Q1;
[0009] Reference voltage output module, the reference voltage output module includes electrically connected resistance network and load current transformer T1, the load current transformer T1 is used to output different reference voltages along with the resistance network resistance change.
[0010] Optionally, the resistance network is connected in series with the secondary of the optocoupler, and the resistance value of the resistance network varies with the secondary impedance of the optocoupler.
[0011] Optionally, the resistance network comprises resistors R9, R10, R11, R12, R13 and R14 connected in parallel.
[0012] Optionally, the circuit for controlling a stepped analog reference voltage by using a DAC data stream further comprises capacitors C2, C3 and C4 for filtering, the capacitor C2 is electrically connected with the transistor Q1, and the capacitors C3 and C4 are electrically connected with the resistance network.
[0013] Optionally, a rectifier bridge is further connected between the load current transformer T1 and the resistance network.
[0014] Optionally, the control chip U1 is a DAC digital-to-analog conversion chip.
[0015] Compared with the prior art, the circuit for controlling a stepped analog reference voltage by using a DAC data stream can effectively improve the versatility and flexibility, by setting a specific circuit structure, utilizing the synergistic effect of the universal DAC digital-to-analog conversion chip, the transistor, the optocoupler and the resistance network and other elements, different analog voltages can be generated according to the input SDA and SCL signal data stream, and then the related parameters in the circuit are changed, and finally the adaptation to different lamp tube light sources is realized. This makes a kind of electronic ballast can match multiple lamp tube light sources at the same time, greatly reduces the product model variety, improves the versatility and flexibility of the product in different application scenarios, without developing and producing different models of electronic ballast for each lamp tube light source, reduces the production and management cost; in addition, the circuit provided by the present application is easy to operate and adjust, by adjusting the data stream of the SDA and SCL signals input to the DAC chip, the adjustment of the output frequency and other parameters of the circuit can be realized, and then the working requirements of different lamp tube light sources are adapted. This operation mode is simple and easy to operate, without complex hardware modification or rewiring of the circuit, reduces the technical requirements for the operator, improves the usability and maintainability of the product. BRIEF DESCRIPTION OF DRAWINGS
[0016] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application.
[0017] Figure 1 The structure schematic view of the circuit provided for the present application.
[0018] Reference signs:
[0019] 1 - signal input processing module; 2 - voltage regulation control module; 3 - reference voltage output module. DETAILED DESCRIPTION
[0020] In order to make the technical problems, technical solutions and beneficial effects of the utility model clearer, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.
[0021] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified. The meaning of "several" is one or more than one, unless otherwise explicitly specified.
[0022] Please refer to Figure 1 The circuit for controlling the DAC data flow and grading analog reference voltage provided by the utility model embodiment comprises a signal input processing module 1, a voltage regulation control module 2 and a reference voltage output module 3, wherein the signal output processing module comprises SDA and SCL signal terminals, the SDA and SCL signal terminals are used for receiving data, the voltage regulation control module 2 comprises a control chip U1, a triode Q1 and a photoelectric coupler connected in sequence, the control chip U1 is connected with the SDA and SCL signal terminals, is used for generating an analog voltage according to the input data and outputting the analog voltage from a PIN1 pin, the analog voltage is used for driving the triode Q1 and affecting the conduction depth of the photoelectric coupler connected with the triode Q1, the reference voltage output module 3 comprises a resistance network and a load current transformer T1 connected in an electrical manner, the load current transformer T1 is used for outputting different reference voltages along with the resistance value change of the resistance network.
[0023] In the application, the resistance network is connected in series with the secondary side of the photoelectric coupler, and the resistance value of the resistance network changes along with the change of the secondary impedance of the photoelectric coupler.
[0024] Further, the resistance network comprises resistors R9, R10, R11, R12, R13 and R14 connected in parallel.
[0025] In the application, the circuit for controlling the stepped analog reference voltage by DAC data stream further comprises a plurality of capacitors C2, C3 and C4 for filtering, wherein the capacitor C2 is electrically connected with the transistor Q1, and the capacitors C3 and C4 are electrically connected with the resistor network.
[0026] In order to convert alternating current into direct current, a rectifier bridge is further connected between the load current transformer T1 and the resistor network.
[0027] In the application, the control chip U1 is a DAC digital-to-analog conversion chip.
[0028] In the application, the circuit for controlling the stepped analog reference voltage by DAC data stream comprises a universal DAC digital-to-analog conversion chip, the data receiving pin of which is connected with the SDA and SCL signal terminals, the SDA and SCL signal terminals receive signals from other signal generating circuits of the main circuit, and the PIN1 pin of the control chip U1 is connected with the transistor Q1, the analog voltage output by the control chip U1 drives the transistor Q1, different analog voltages result in different conduction degrees of the transistor Q1, the transistor Q1 is connected with the photoelectric coupler, the conduction depth of the photoelectric coupler changes with the conduction degree of the transistor Q1, the secondary of the photoelectric coupler is connected in series with the resistor network, the resistor network is composed of the resistors R9, R10, R11, R12, R13 and R14 connected in parallel, the resistance value of the resistor network changes with the impedance of the secondary of the photoelectric coupler, the load current transformer T1 generates different VREF reference voltages with the change of the resistance value of the resistor network, different reference voltages are realized corresponding to different data streams of the SDA and SCL signal terminals, the stepped VREF reference voltage is output to other circuits of the main circuit, and different frequencies are output by the other circuits according to different reference voltages, so as to adapt to the preheating current and working current requirements of different lamp tubes, and the adaptation of different lamp tubes is realized.
[0029] From the structure and the specific implementation process of the circuit, it can be known that the circuit provided by the application can effectively improve the versatility and flexibility, by setting a specific circuit structure, utilizing the synergistic effect of the universal DAC digital / analog conversion chip, the triode, the optocoupler and the resistance network and other elements, different analog voltages can be generated according to the input SDA and SCL signal data streams, and then the related parameters in the circuit are changed, and finally the adaptation to different lamp tube light sources is realized. This makes an electronic ballast can match multiple lamp tube light sources at the same time, greatly reduces the product model variety, improves the versatility and flexibility of the product in different application scenarios, without developing and producing different models of electronic ballasts for each lamp tube light source, reduces the production and management cost; in addition, the circuit provided by the application is convenient to operate and adjust, by adjusting the data stream of the SDA and SCL signals input to the DAC chip, a relatively simple operation mode can realize the adjustment of the circuit output frequency and other parameters, and then adapt to the working requirements of different lamp tube light sources. This operation mode is simple and easy to operate, without complex hardware modification or rewiring of the circuit, reduces the technical requirements for the operator, improves the usability and maintainability of the product.
[0030] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0031] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A circuit for dividing a reference analog voltage using DAC data stream control, characterized by, The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1.
2. The circuit employing DAC data stream controlled fractionalizing analog reference voltage of claim 1, wherein, The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1.
3. The circuit employing DAC data stream controlled fractionalizing analog reference voltage of claim 2, wherein, The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1.
4. The circuit employing DAC data stream controlled fractionalizing analog reference voltage of claim 1, wherein, The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1.
5. The circuit employing DAC data stream controlled fractionalizing analog reference voltage of claim 1, wherein, The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1.
6. The circuit employing DAC data stream controlled fractionalizing analog reference voltage of claim 1, wherein, The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current transformer T1. The utility model relates to a signal input processing module, a voltage regulation control module, a reference voltage output module and a load current