LED dimming power supply control circuit with low standby power consumption and adjustable main light and auxiliary light

Abstract

The utility model discloses an LED (light-emitting diode) dimming power supply control circuit with low standby power consumption and adjustable main and auxiliary light, which comprises a module power supply circuit, a working circuit power supply circuit, a control circuit and an external feedback regulation circuit, and is characterized in that the module power supply circuit is connected with the control circuit and supplies power to the control circuit through the module power supply circuit; the working circuit power supply circuit is connected with the main light source and supplies power to the main light source through the working circuit power supply circuit. The control circuit comprises a control module, a power-on and power-off detection circuit, a standby control circuit and a main light driving control circuit, the control module detects the power-on and power-off state through the power-on and power-off detection circuit, and the control module is connected with the working circuit power supply circuit through the standby control circuit and controls the working state of the working circuit power supply circuit; the control module is connected with the auxiliary light source through the auxiliary light driving control circuit and controls the working state of the auxiliary light source. The control module is connected with the main light source through the main light driving control circuit and controls the working state of the main light source.

Description

Technical Field

[0001] The utility model relates to the field of lamps, and particularly relates to an LED dimming power supply control circuit with adjustable main and auxiliary lights and low standby power consumption. Background Technique

[0002] In daily use, the efficiency and standby power consumption of electrical equipment are particularly important. The working efficiency and standby power consumption are long-term time-consuming. The daily working hours of some electrical equipment may only be 2 hours, but the normal standby time is close to 24 hours. Therefore, low standby power consumption and high working efficiency are indicators that must be quantified and evaluated for electrical equipment.

[0003] Taking the current intelligent lighting industry as an example, the standby power consumption of intelligent LED power supplies is relatively high, about 1W, and when the power is lower than a certain value, the PF correction circuit cannot work properly, resulting in low working efficiency of equipment in the low-power segment, which urgently needs to be improved and optimized. At the same time, for side-emitting and backlight lamps, the non-adjustability of the auxiliary light and the non-uniformity of the overall lamp brightness adjustment need to be improved; in the ordinary home lighting market, the LED dimming scheme is chaotic. At present, there are huge non-conformity fundamentals in the safety regulations of supporting light sources for non-offline power supplies in the industry, and there are huge problems in driving standardization and light source standardization.

[0004] Therefore, there is a need for an LED dimming power supply control circuit with adjustable main and auxiliary lights and low standby power consumption that can achieve the consistency and independent control of the brightness and color temperature adjustment of the main and auxiliary lights by setting a main light drive control circuit and an auxiliary light drive control circuit, and can achieve lower costs and higher production efficiency. Content of the Utility Model

[0005] The main purpose of the utility model is to provide an LED dimming power supply control circuit with adjustable main and auxiliary lights and low standby power consumption that can achieve the consistency and independent control of the brightness and color temperature adjustment of the main and auxiliary lights by setting a main light drive control circuit and an auxiliary light drive control circuit, and can achieve lower costs and higher production efficiency.

[0006] The utility model provides an LED dimming power supply control circuit with adjustable main and auxiliary lights and low standby power consumption, including a module power supply circuit, a working circuit power supply circuit, a control circuit, a main light source and an auxiliary light source;

[0007] The module power supply circuit is connected to the control circuit and supplies power to the control circuit through the module power supply circuit. The working circuit power supply circuit is connected to the main light source and supplies power to the main light source through the working circuit power supply circuit, and the working circuit power supply circuit can achieve off-line output;

[0008] The control circuit includes a control module, a power-on / off detection circuit, a standby control circuit, a main light drive control circuit, and an auxiliary light drive control circuit. The control module detects the power-on / off state through the power-on / off detection circuit. The control module is connected to the power supply circuit of the working circuit through the standby control circuit and controls the working state of the power supply circuit of the working circuit. The control module is connected to the main light source through the main light drive control circuit and controls the working state of the main light source. The control module is connected to the auxiliary light source through the auxiliary light drive control circuit and controls the working state of the auxiliary light source.

[0009] The main light drive control circuit includes a main light control circuit and a main light drive circuit. The main light control circuit includes MOS transistors M2 and M3, diodes D14 and D15. The sources of MOS transistors M2 and M3 are grounded, and the gates of MOS transistors M2 and M3 are connected to the control module. The drain of MOS transistor M2 is connected to the first dimming drive output pin, and the drain of MOS transistor M3 is connected to the third dimming drive output pin. The drains of MOS transistors M2 and M3 are connected to the second dimming drive output pin through diodes D14 and D15, respectively.

[0010] The auxiliary light driving control circuit includes transistors Q21, Q22, Q23, Q24, Q25, Q26 and Q27, resistors R81, R82, R83, R84, R85, R86, R87, R88, R89, R90, R91, R92, R93, R94 and R95, capacitors C31 and C32, MOSFET M9 and Zener diode Z2;

[0011] One output pin of the control module is first connected to resistor R81 and then to the base of transistor Q21 and the collector of transistor Q27 respectively. The collector of transistor Q21 is connected to the base of transistor Q23. The collector of transistor Q23 is connected to the base of transistors Q24 and Q25 respectively. The emitters of transistors Q24 and Q25 are connected to the gate of MOSFET M9. The drain of MOSFET M9 is connected to the auxiliary light source.

[0012] The source of MOSFET M9 is connected to the base of transistor Q22 through resistor R89. The collector of transistor Q22 is connected to the base of transistor Q26 through resistor R87. The collector of transistor Q26 is connected to the base of transistor Q27.

[0013] Preferably, it further includes an external feedback adjustment circuit, which is connected to the power supply circuit of the working circuit and can adjust the output voltage of the power supply circuit of the working circuit to achieve output power adjustment.

[0014] Preferably, the power-on / off detection circuit includes diodes D7 and D8, capacitors CP8, CP9 and CP10, resistors R23, R24, R25 and R26, transistor Q1 and optocoupler G1;

[0015] One end of capacitor CP8 is connected to the AC live wire ACL, and the other end of capacitor CP8 is connected to ACN through diode D7 and to the input terminal of optocoupler G1 through resistor R24. The output terminal of optocoupler G1 is connected to the base of transistor Q6, and the collector of transistor Q6 is connected to one of the pins of the control module. By setting up a power-on / off detection circuit, the AC power-on / off can be reliably determined.

[0016] Preferably, the control module includes a control module body, an external module interface, and a pluggable smart module. The pluggable smart module can be connected to the control module body through the external module interface, and the functionality and scalability of the product can be improved by replacing the pluggable smart modules with different functions and versions.

[0017] Preferably, the standby control circuit includes resistors R15, R16, R17, R18, R19, R20 and R21, transistors Q2, Q3 and Q4, diodes D5 and D9, and optocoupler G1;

[0018] One pin of the control module is connected to the input of optocoupler G1 via resistor R21. The output of optocoupler G1 is connected to the base of transistor Q3, the base of transistor Q4, and the base and collector of transistor Q2, respectively. The emitters of transistors Q3 and Q4 are grounded. The collector of transistor Q4 is connected to the base of transistor Q3. The collector of transistor Q3 and the emitter of transistor Q2 are connected to one end of diodes D5 and D9 via resistors R15 and R16, respectively. The other ends of diodes D5 and D9 are connected to the power supply circuit of the working circuit.

[0019] Preferably, the control circuit further includes a short-circuit protection control circuit, which provides short-circuit protection for the main optical drive control circuit.

[0020] Preferably, the short-circuit protection control circuit includes a detection shielding circuit, a voltage triggering circuit, a delay reset circuit, and a control output circuit. The voltage triggering circuit includes a resistor R35 and a transistor Q7. The delay reset circuit includes resistors R36, R37, and R38 and a capacitor CP12. The control output circuit includes transistors Q8, Q9, and Q10 and resistors R33, R34, and R39. The detection shielding circuit includes resistors R29, R30, and R32 and transistors Q11 and Q12.

[0021] Preferably, the external feedback adjustment circuit includes an externally mounted adjustable resistor KT1, which can adjust the output voltage of the power supply circuit of the working circuit by adjusting the adjustable resistor KT1.

[0022] The beneficial effects of this utility model's low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light are as follows:

[0023] 1. By setting up a main light drive control circuit and an auxiliary light drive control circuit, the consistency and independent control of the brightness and color temperature adjustment of the main and auxiliary lights can be achieved together.

[0024] 2. By setting an external module interface, and allowing pluggable smart modules to connect to the control module body through the external module interface, the functionality and expandability of the product can be improved by replacing pluggable smart modules with different functions and versions.

[0025] 3. The short-circuit protection control circuit adopts a high-speed architecture with protection delay, which combines discrete components, solving the problems of lack of short-circuit protection and cost in the industry.

[0026] 4. By adopting an independent modular power supply circuit, the power supply stability problem caused by the control module's transmission and reception can be solved.

[0027] 5. By setting up an auxiliary light control module, compatibility between dual-color power supply and main and auxiliary power supply can be achieved, and production can be switched at will; at the same time, the main and auxiliary light power can be matched arbitrarily, determined by the load. Attached Figure Description

[0028] Figure 1 This is an overall application block diagram of the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary lights according to this utility model.

[0029] Figure 2 The circuit diagram shows the overall control circuit of the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light of this utility model.

[0030] Figure 3 The circuit diagram shows the external feedback adjustment circuit of the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light of this utility model.

[0031] Figure 4 The circuit diagram shows the module power supply circuit of the low standby power consumption LED dimming power control circuit with adjustable main and auxiliary light of this utility model.

[0032] Figure 5 The circuit diagram shows the on / off detection circuit of the low standby power consumption LED dimming power control circuit with adjustable main and auxiliary light of this utility model.

[0033] Figure 6The circuit diagram of the control circuit in the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light of this utility model is shown.

[0034] Figure 7 The circuit diagram is for the standby control circuit of the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light of this utility model.

[0035] Figure 8 The circuit diagram of the main light drive circuit of the low standby power consumption LED dimming power control circuit with adjustable main and auxiliary light is shown in this utility model.

[0036] Figure 9 The circuit diagram of the auxiliary light drive control circuit of the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary lights of this utility model is shown.

[0037] The diagram is labeled as follows: 1. Working circuit power supply circuit; 2. Main light source; 3. Module power supply circuit; 4. Control circuit; 5. External feedback adjustment circuit; 6. Auxiliary light source; 11. EMC circuit; 12. AC rectifier circuit; 13. PF correction circuit; 14. DC-DC primary circuit; 15. DC-DC secondary circuit and DC-DC output circuit; 41. Power-on / off detection circuit; 42. Standby control circuit; 43. Control module; 44. Main light drive control circuit; 45. Short circuit protection control circuit; 47. Auxiliary light drive control circuit; 431. External IoT module.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0040] Reference Figures 1 to 9 An embodiment of the low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light is proposed:

[0041] A low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light sources includes a module power supply circuit 3, a working circuit power supply circuit 1, a control circuit 4, an external feedback adjustment circuit 5, a main light source 2, and an auxiliary light source 6.

[0042] The power supply circuit 1 of the working circuit includes an EMC circuit 11, an AC rectifier circuit 12, a PFC correction circuit 13, a DC-DC primary circuit 14, a DC-DC secondary circuit, and a DC-DC output circuit 15. The input terminal of the EMC circuit 11 is connected to the mains power, the output terminal of the EMC circuit 11 is connected to the input terminal of the AC rectifier circuit 12, the output terminal of the AC rectifier circuit 12 is connected to the input terminal of the PFC correction circuit 13, the output terminal of the PFC correction circuit 13 is connected to the input terminal of the DC-DC primary circuit 14, the output terminal of the DC-DC primary circuit 14 is connected to the input terminals of the DC-DC secondary circuit and the DC-DC output circuit 15, and the output terminals of the DC-DC secondary circuit and the DC-DC output circuit 15 are connected to the main light source 2 and the auxiliary light source 6.

[0043] The module power supply circuit 3 is connected to the control circuit 4 and supplies power to the control circuit 4 through the module power supply circuit 3. In the module power supply circuit 3, chip U1 generates 15V and 4.2V power through transformer L2, and then generates 3.3V power through LDO chip U4 to supply power to the control circuit 4.

[0044] The external feedback regulation circuit 5 includes an externally mounted adjustable resistor KT1. By adjusting the adjustable resistor KT1, a control signal is input to the DC-DC primary circuit 14 to regulate the output voltage of the power supply circuit 1. In this embodiment, the adjustment is based on a voltage of 36V.

[0045] The control circuit 4 includes a control module 43, a power-on / off detection circuit 41, a standby control circuit 42, a short-circuit protection circuit 45, an auxiliary light drive control circuit 47, and a main light drive control circuit 44. The control module 43 includes a control module body, an external module interface, and an external IoT module 431. The external IoT module 431 can be connected to the control module body through the external module interface, and the functionality and scalability of the product can be improved by replacing the external IoT module 431 with different functions and versions.

[0046] The power-on / off detection circuit 41 includes diodes D7 and D8, capacitors CP8, CP9 and CP10, resistors R23, R24, R25 and R26, transistor Q1, and optocoupler G1. One end of capacitor CP8 is connected to the AC live wire ACL, and the other end of capacitor CP8 is connected to ACN through diode D7 and to the input terminal of optocoupler G1 through resistor R24. The output terminal of optocoupler G1 is connected to the base of transistor Q6, and the collector of transistor Q6 is connected to one of the pins of the control module. By setting up the power-on / off detection circuit, the AC power can be reliably determined. AC power is blocked by capacitor CP8, and the coupling current is stored in capacitor CP9 through diode D8. The current-limiting resistor R24 ​​drives optocoupler G1 to generate a control signal at transistor Q6 on the other side of optocoupler G1. When ACL is powered on, transistor Q6 is turned off, outputting a high level to the control module; otherwise, it outputs a low level.

[0047] The standby control circuit 42 includes resistors R15, R16, R17, R18, R19, R20, and R21, transistors Q2, Q3, and Q4, diodes D5 and D9, and optocoupler G1. One pin of the control module is connected to the input terminal of optocoupler G1 through resistor R21. The output terminal of optocoupler G1 is connected to the base of transistor Q3, the base of transistor Q4, and the base and collector of transistor Q2, respectively. The emitters of transistors Q3 and Q4 are grounded. The collector of transistor Q4 is connected to the base of transistor Q3. The collector of transistor Q3 and the emitter of transistor Q2 are connected to one end of diodes D5 and D9 through resistors R15 and R16, respectively. The other ends of diodes D5 and D9 are connected to the power supply circuit of the operating circuit. When the power supply circuit 1 of the working circuit needs to be turned on, the control module 43 drives the optocoupler G2 through the resistor R21, so that the transistor Q4 is turned off and the transistors Q3 and Q2 are turned on, thereby enabling the power supply circuit 1 of the working circuit to work normally. When the power supply circuit 1 of the working circuit needs to be turned off, the control module 43 drives the optocoupler G2 through the resistor R21, so that the transistor Q4 is turned on and the transistors Q3 and Q2 are turned off, so that the power supply circuit 1 of the working circuit stops working and achieves zero power consumption.

[0048] The main light drive control circuit 44 includes a main light drive circuit and a main light control circuit. The main light control circuit includes MOSFETs M2 and M3, and diodes D14 and D15. The sources of MOSFETs M2 and M3 are grounded, and the gates of MOSFETs M2 and M3 are connected to the control module 43. The drain of MOSFET M2 is connected to the first dimming drive output pin, and the drain of MOSFET M3 is connected to the third dimming drive output pin. The drains of MOSFETs M2 and M3 are connected to the second dimming drive output pin through diodes D14 and D15, respectively. The operating state of the main light source 2 is controlled through the first, second, and third dimming drive output pins.

[0049] The auxiliary light drive control circuit 47 includes transistors Q21, Q22, Q23, Q24, Q25, Q26 and Q27, resistors R81, R82, R83, R84, R85, R86, R87, R88, R89, R90, R91, R92, R93, R94 and R95, capacitors C31 and C32, MOSFET M9 and Zener diode Z2.

[0050] One output pin of control module 43 is first connected to resistor R81, then to the base of transistor Q21 and the collector of transistor Q27. The collector of transistor Q21 is connected to the base of transistor Q23. The collector of transistor Q23 is connected to the base of transistors Q24 and Q25. The emitters of transistors Q24 and Q25 are connected to the gate of MOSFET M9. The drain of MOSFET M9 is connected to auxiliary light source 6. The source of MOSFET M9 is grounded through resistors R92, R93, R94, and R95. The emitters of transistors Q21, Q23, and Q24 are grounded. The output of module power supply circuit 3 is connected to the collectors of transistors Q21 and Q23 through resistors R90 and R91, then through resistors R82 and R86.

[0051] The source of MOSFET M9 is connected to the base of transistor Q22 via resistor R89. The collector of transistor Q22 is connected to the base of transistor Q26 via resistor R87. The collector of transistor Q26 is connected to the base of transistor Q27. The output of module power supply circuit 3 is connected to the collectors of transistors Q22 and Q26 via resistors R90 and R91, and then to the collectors of transistors Q22 and Q26 via resistors R83 and R85, respectively. The emitters of transistors Q22, Q26, and Q27 are grounded.

[0052] The short-circuit protection control circuit 45 includes a detection shielding circuit, a voltage triggering circuit, a delay reset circuit, and a control output circuit. The voltage triggering circuit includes a resistor R35 and a transistor Q7. The delay reset circuit includes resistors R36, R37, and R38 and a capacitor CP12. The control output circuit includes transistors Q8, Q9, and Q10 and resistors R33, R34, and R39. The detection shielding circuit includes resistors R29, R30, and R32 and transistors Q11 and Q12.

[0053] When in standby mode, the standby control circuit 42 shuts off all power to the working circuit power supply circuit 1. At this time, the standby power consumption of the working circuit power supply circuit 1 is "0", and only the power consumption of the module power supply circuit 3 plus the power on / off detection circuit 41 is consumed, thus achieving a complete standby state.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light, characterized in that, It includes a module power supply circuit, a working circuit power supply circuit, a control circuit, a main light source, and an auxiliary light source; The module power supply circuit is connected to the control circuit and supplies power to the control circuit through the module power supply circuit. The working circuit power supply circuit is connected to the main light source and supplies power to the main light source through the working circuit power supply circuit. The working circuit power supply circuit can achieve dual output of 24V and 36V. The control circuit includes a control module, a power-on / off detection circuit, a standby control circuit, a main light drive control circuit, and an auxiliary light drive control circuit. The control module detects the power-on / off state through the power-on / off detection circuit. The control module is connected to the power supply circuit of the working circuit through the standby control circuit and controls the working state of the power supply circuit of the working circuit. The control module is connected to the main light source through the main light drive control circuit and controls the working state of the main light source. The control module is connected to the auxiliary light source through the auxiliary light drive control circuit and controls the working state of the auxiliary light source. The main light drive control circuit includes a main light control circuit and a main light drive circuit. The main light control circuit includes MOS transistors M2 and M3, diodes D14 and D15. The sources of MOS transistors M2 and M3 are grounded, and the gates of MOS transistors M2 and M3 are connected to the control module. The drain of MOS transistor M2 is connected to the first dimming drive output pin, and the drain of MOS transistor M3 is connected to the third dimming drive output pin. The drains of MOS transistors M2 and M3 are connected to the second dimming drive output pin through diodes D14 and D15, respectively. The auxiliary light driving control circuit includes transistors Q21, Q22, Q23, Q24, Q25, Q26 and Q27, resistors R81, R82, R83, R84, R85, R86, R87, R88, R89, R90, R91, R92, R93, R94 and R95, capacitors C31 and C32, MOSFET M9 and Zener diode Z2; One output pin of the control module is first connected to resistor R81 and then to the base of transistor Q21 and the collector of transistor Q27 respectively. The collector of transistor Q21 is connected to the base of transistor Q23. The collector of transistor Q23 is connected to the base of transistors Q24 and Q25 respectively. The emitters of transistors Q24 and Q25 are connected to the gate of MOSFET M9. The drain of MOSFET M9 is connected to the auxiliary light source. The source of MOSFET M9 is connected to the base of transistor Q22 through resistor R89. The collector of transistor Q22 is connected to the base of transistor Q26 through resistor R87. The collector of transistor Q26 is connected to the base of transistor Q27.

2. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 1, characterized in that, It also includes an external feedback adjustment circuit, which is connected to the power supply circuit of the working circuit and can adjust the output voltage of the power supply circuit of the working circuit to achieve output power adjustment.

3. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 1, characterized in that, The power-on / off detection circuit includes diodes D7 and D8, capacitors CP8, CP9 and CP10, resistors R23, R24, R25 and R26, transistor Q1 and optocoupler G1; One end of capacitor CP8 is connected to the AC live wire ACL, and the other end of capacitor CP8 is connected to ACN through diode D7 and to the input terminal of optocoupler G1 through resistor R24. The output terminal of optocoupler G1 is connected to the base of transistor Q6, and the collector of transistor Q6 is connected to one of the pins of the control module. By setting up a power-on / off detection circuit, the AC power-on / off can be reliably determined.

4. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 1, characterized in that, The control module includes a control module body, an external module interface, and a pluggable smart module. The pluggable smart module can be connected to the control module body through the external module interface, and the functionality and scalability of the product can be improved by replacing the pluggable smart modules with different functions and versions.

5. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 1, characterized in that, The standby control circuit includes resistors R15, R16, R17, R18, R19, R20 and R21, transistors Q2, Q3 and Q4, diodes D5 and D9, and optocoupler G1; One pin of the control module is connected to the input of optocoupler G1 via resistor R21. The output of optocoupler G1 is connected to the base of transistor Q3, the base of transistor Q4, and the base and collector of transistor Q2, respectively. The emitters of transistors Q3 and Q4 are grounded. The collector of transistor Q4 is connected to the base of transistor Q3. The collector of transistor Q3 and the emitter of transistor Q2 are connected to one end of diodes D5 and D9 via resistors R15 and R16, respectively. The other ends of diodes D5 and D9 are connected to the power supply circuit of the working circuit.

6. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 1, characterized in that, The control circuit also includes a short-circuit protection control circuit, which provides short-circuit protection for the main optical drive control circuit.

7. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 6, characterized in that, The short-circuit protection control circuit includes a detection shielding circuit, a voltage triggering circuit, a delay reset circuit, and a control output circuit. The voltage triggering circuit includes a resistor R35 and a transistor Q7. The delay reset circuit includes resistors R36, R37, and R38 and a capacitor CP12. The control output circuit includes transistors Q8, Q9, and Q10 and resistors R33, R34, and R39. The detection shielding circuit includes resistors R29, R30, and R32 and transistors Q11 and Q12.

8. The low standby power consumption LED dimming power supply control circuit with adjustable main and auxiliary light according to claim 2, characterized in that, The external feedback adjustment circuit includes an externally mounted adjustable resistor KT1, which can be used to adjust the output voltage of the power supply circuit of the working circuit by adjusting the adjustable resistor KT1.

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