CN118102537A - High-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change - Google Patents
High-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change Download PDFInfo
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- CN118102537A CN118102537A CN202410487301.5A CN202410487301A CN118102537A CN 118102537 A CN118102537 A CN 118102537A CN 202410487301 A CN202410487301 A CN 202410487301A CN 118102537 A CN118102537 A CN 118102537A
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- source circuit
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- 238000004804 winding Methods 0.000 claims abstract description 52
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 16
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 claims abstract description 7
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000009286 beneficial effect Effects 0.000 description 2
- 208000031361 Hiccup Diseases 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change comprises the following components; the transformer T1, the primary end of the transformer T1 is provided with a winding N1 and a winding N2, and the secondary end is provided with a winding N3; one end of the winding N1 is input with a voltage, the other end of the winding N1 is connected with the input end of the main control unit U1, one end of the winding N2 is grounded, the other end of the winding N2 is connected with an endpoint LOAD, and the end of the winding N2 is also connected with the VDD end of the main control unit U1; one end of winding N3 is connected with terminal VCC1, and this end still is connected with triode Q1's collecting electrode, and triode Q1's projecting pole is connected with the output positive pole, and winding N3's the other end is connected with voltage stabilizing unit U3's one end, and this end still is connected with the output negative pole, and voltage stabilizing unit U3's the other end is connected with triode Q1's base, and the positive pole of output is equipped with terminal V1, and terminal V1 is connected with voltage stabilizing unit U3's collection end.
Description
Technical Field
The invention relates to the field of LED driving power supplies, in particular to a high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change.
Background
The primary auxiliary source of many LED power supplies always carries 2.5W and no-load change, the secondary auxiliary source also always carries 2.5W and no-load change, the auxiliary output voltage precision of the auxiliary source output at high and low temperature and when various primary and secondary auxiliary sources carry change is required to be within 3%, the no-load power consumption of the auxiliary source is required to be small, the power consumption of the LED power supply when the light modulation is turned off is smaller than 0.5W, when an SSR auxiliary source scheme with optocoupler control is adopted, the auxiliary source cannot normally and stably work when the secondary auxiliary source is in no-load and primary heavy load, the auxiliary source scheme with PSR control needs to stably work when the secondary auxiliary load is adopted, the power consumption is overlarge, the output voltage is quite high when the secondary auxiliary source is in no-load and primary heavy load, the precision does not meet the requirement, the precision requirement is required to be reached when the secondary auxiliary load is in the pseudo load, and the power consumption is overlarge.
Disclosure of Invention
In order to solve the problems, the technical scheme provides a high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change.
In order to achieve the above purpose, the technical scheme is as follows:
A high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change comprises the following components;
the transformer T1, wherein a winding N1 and a winding N2 are arranged at the primary end of the transformer T1, and a winding N3 is arranged at the secondary end;
One end of the winding N1 is input with a voltage, the other end of the winding N1 is connected with the input end of the main control unit U1, one end of the winding N2 is grounded, the other end of the winding N2 is connected with an endpoint LOAD, and the end of the winding N2 is also connected with the VDD end of the main control unit U1;
One end of the winding N3 is connected with an endpoint VCC1, the end is further connected with a collector of the triode Q1, an emitter of the triode Q1 is connected with an anode of an output end, the other end of the winding N3 is connected with one end of the voltage stabilizing unit U3, the end is further connected with a cathode of the output end, the other end of the voltage stabilizing unit U3 is connected with a base of the triode Q1, an anode of the output end is provided with an endpoint V1, and the endpoint V1 is connected with an acquisition end of the voltage stabilizing unit U3.
In some embodiments, a capacitor C2 is disposed between the terminal V1 and one end of the voltage stabilizing unit U3.
In some embodiments, the input positive electrode is connected to the terminal V1 through a resistor R8, and the resistor R8 is connected to the output negative electrode through a resistor R7.
In some embodiments, a capacitor C3 is disposed between the positive and negative electrodes of the output terminal.
In some embodiments, a resistor R6 is disposed between the collector and the base of the transistor Q1.
In some embodiments, one end of the winding N3 is connected to one end of a diode D3, the other end of the diode D3 is connected to one end of a capacitor EC4, and the other end of the capacitor EC4 is connected to the other end of the winding N3.
In some embodiments, the other end of the winding N2 is connected to one end of a diode D2, and the other end of the diode D2 is connected to the terminal LOAD, which is grounded through a capacitor EC 2.
In some embodiments, the other end of the diode D2 is connected to the VDD terminal of the master control unit U1 through a diode D1, and the VDD terminal is further grounded through a capacitor C1.
In some embodiments, the other end of the winding N2 is connected to one end of a resistor R3, the other end of the resistor R3 is connected to the collecting end of the main control unit U1, and the other end of the resistor R3 is grounded through the resistor R2.
In some embodiments, the enable terminal of the master control unit U1 is grounded through a resistor R1.
The application has the beneficial effects that:
the application can output the auxiliary source output with high precision and low temperature drift under the conditions of primary and secondary heavy idle load change and high and low temperature, and can also meet the requirement of small idle power consumption of the auxiliary source, thereby achieving the purposes that the power consumption of the LED power supply is less than 0.5W when the light modulation is turned off and providing the auxiliary source output with high precision and low temperature drift.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below.
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, a high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load variation includes;
the transformer T1, wherein a winding N1 and a winding N2 are arranged at the primary end of the transformer T1, and a winding N3 is arranged at the secondary end;
One end of the winding N1 is input with a voltage, the other end of the winding N1 is connected with the input end of the main control unit U1, one end of the winding N2 is grounded, the other end of the winding N2 is connected with an endpoint LOAD, and the end of the winding N2 is also connected with the VDD end of the main control unit U1;
One end of the winding N3 is connected with an endpoint VCC1, the end is further connected with a collector of the triode Q1, an emitter of the triode Q1 is connected with an anode of an output end, the other end of the winding N3 is connected with one end of the voltage stabilizing unit U3, the end is further connected with a cathode of the output end, the other end of the voltage stabilizing unit U3 is connected with a base of the triode Q1, an anode of the output end is provided with an endpoint V1, and the endpoint V1 is connected with an acquisition end of the voltage stabilizing unit U3.
In this embodiment, a capacitor C2 is disposed between the terminal V1 and one end of the voltage stabilizing unit U3.
In this embodiment, the positive electrode of the input terminal is connected to the terminal V1 through a resistor R8, and the resistor R8 is connected to the negative electrode of the output terminal through a resistor R7.
In this embodiment, a capacitor C3 is disposed between the positive electrode and the negative electrode of the output terminal.
In this embodiment, a resistor R6 is disposed between the collector and the base of the transistor Q1.
In this embodiment, one end of the winding N3 is connected to one end of a diode D3, the other end of the diode D3 is connected to one end of a capacitor EC4, and the other end of the capacitor EC4 is connected to the other end of the winding N3.
In this embodiment, the other end of the winding N2 is connected to one end of a diode D2, and the other end of the diode D2 is connected to the terminal LOAD, and the terminal LOAD is grounded through a capacitor EC 2.
In this embodiment, the other end of the diode D2 is connected to the VDD terminal of the master control unit U1 through a diode D1, and the VDD terminal is further grounded through a capacitor C1.
In this embodiment, the other end of the winding N2 is connected to one end of a resistor R3, the other end of the resistor R3 is connected to the collecting end of the main control unit U1, and the other end of the resistor R3 is grounded through the resistor R2.
In this embodiment, the enable end of the master control unit U1 is grounded through a resistor R1.
When HV+ and VSS nodes are electrified, the U1 control chip controls the voltage of the secondary VCC1 node through the turn ratio of N2/N3 of the T1 transformer, the ratio of the primary R3 and R2 resistors is high, when the primary LOAD node dynamically changes in heavy and light LOADs and the secondary auxiliary source VCC1 node changes in heavy and light LOADs, the voltage of the secondary VCC1 node changes greatly, and by the control of the circuit, when the voltage between the OUT+ and OUT-nodes reaches the starting voltage of the U3 precision voltage stabilizing chip through the voltage divided by the R8 and R7 resistors, the base voltage of the Q1 NPN triode is pulled down, so that the output voltage between OUT+ and OUT-is kept stable, the output voltage precision between OUT+ and OUT+ is high and can be kept within 3 percent no matter the dynamic heavy and light LOAD changes at the primary LOAD node and the secondary auxiliary source OUT+ node, the false LOAD is not needed, the high-precision low-temperature drift auxiliary source can be output, the C2 capacitor in the invention can be further adjusted, the output current value of the Q1 triode can be adjusted, and the best idle current value of the triode can be adjusted.
When the auxiliary source OUT+ and OUT-output short circuit or overcurrent, the U1 control chip realizes auxiliary source hiccup protection by detecting overvoltage at two ends of the R1 resistor, and reliability of the auxiliary source is ensured.
By adopting the circuit, under the conditions of primary and secondary dynamic heavy idle load change and high and low temperature environment change, the high-precision low-temperature drift low-power consumption auxiliary source output can be provided, the auxiliary source output with the output precision less than 3% can be provided under the conditions of primary and secondary various load change and high and low temperature change, the power consumption of the auxiliary source in idle load can be very low, and the power consumption of the LED power supply in dimming and turn-off is less than 0.5W.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, but rather is presented in the claims.
Claims (10)
1. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change is characterized by comprising the following components;
the transformer T1, wherein a winding N1 and a winding N2 are arranged at the primary end of the transformer T1, and a winding N3 is arranged at the secondary end;
One end of the winding N1 is input with a voltage, the other end of the winding N1 is connected with the input end of the main control unit U1, one end of the winding N2 is grounded, the other end of the winding N2 is connected with an endpoint LOAD, and the end of the winding N2 is also connected with the VDD end of the main control unit U1;
One end of the winding N3 is connected with an endpoint VCC1, the end is further connected with a collector of the triode Q1, an emitter of the triode Q1 is connected with an anode of an output end, the other end of the winding N3 is connected with one end of the voltage stabilizing unit U3, the end is further connected with a cathode of the output end, the other end of the voltage stabilizing unit U3 is connected with a base of the triode Q1, an anode of the output end is provided with an endpoint V1, and the endpoint V1 is connected with an acquisition end of the voltage stabilizing unit U3.
2. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 1, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: a capacitor C2 is disposed between the terminal V1 and one end of the voltage stabilizing unit U3.
3. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 2, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: the positive electrode of the input end is connected with the endpoint V1 through a resistor R8, and the resistor R8 is connected with the negative electrode of the output end through a resistor R7.
4. A primary and secondary dynamic heavy idle variation high precision low power consumption auxiliary source circuit as defined in claim 3, wherein: and a capacitor C3 is arranged between the positive electrode and the negative electrode of the output end.
5. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 4, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: a resistor R6 is arranged between the collector and the base of the triode Q1.
6. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 5, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: one end of the winding N3 is connected with one end of a diode D3, the other end of the diode D3 is connected with one end of a capacitor EC4, and the other end of the capacitor EC4 is connected with the other end of the winding N3.
7. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 1, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: the other end of the winding N2 is connected with one end of a diode D2, the other end of the diode D2 is connected with the terminal LOAD, and the terminal LOAD is grounded through a capacitor EC 2.
8. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 7, wherein the high-precision low-power consumption auxiliary source circuit comprises: the other end of the diode D2 is connected with the VDD end of the main control unit U1 through a diode D1, and the VDD end is grounded through a capacitor C1.
9. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 1, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: the other end of the winding N2 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the collecting end of the main control unit U1, and the other end of the resistor R3 is grounded through the resistor R2.
10. The high-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle variation according to claim 1, wherein the high-precision low-power consumption auxiliary source circuit is characterized in that: the enabling end of the main control unit U1 is grounded through a resistor R1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410487301.5A CN118102537A (en) | 2024-04-23 | 2024-04-23 | High-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410487301.5A CN118102537A (en) | 2024-04-23 | 2024-04-23 | High-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change |
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| Publication Number | Publication Date |
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| CN118102537A true CN118102537A (en) | 2024-05-28 |
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|---|---|---|---|
| CN202410487301.5A Withdrawn CN118102537A (en) | 2024-04-23 | 2024-04-23 | High-precision low-power consumption auxiliary source circuit for primary and secondary dynamic heavy idle load change |
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| CN (1) | CN118102537A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118765008A (en) * | 2024-08-30 | 2024-10-11 | 深圳市华浩德电子有限公司 | High-precision low-temperature drift low-loss PSR auxiliary source control circuit |
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| CN103475074A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | No-load low-loss battery charging circuit |
| WO2020181830A1 (en) * | 2019-03-12 | 2020-09-17 | 青岛海信电器股份有限公司 | Display apparatus and power supply control method |
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-
2024
- 2024-04-23 CN CN202410487301.5A patent/CN118102537A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103475074A (en) * | 2013-08-27 | 2013-12-25 | 崧顺电子（深圳）有限公司 | No-load low-loss battery charging circuit |
| WO2020181830A1 (en) * | 2019-03-12 | 2020-09-17 | 青岛海信电器股份有限公司 | Display apparatus and power supply control method |
| CN212695908U (en) * | 2020-09-29 | 2021-03-12 | 中国电子科技集团公司第四十三研究所 | Small-size nimble supplementary power supply circuit |
Non-Patent Citations (1)
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| 邢心润: "一种磁反馈开关电源的设计与实现", 《中国优秀硕士学位论文全文数据库·信息科技辑》, no. 8, 15 August 2018 (2018-08-15) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118765008A (en) * | 2024-08-30 | 2024-10-11 | 深圳市华浩德电子有限公司 | High-precision low-temperature drift low-loss PSR auxiliary source control circuit |
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Application publication date: 20240528 |
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