LED bridge type two-wire dimming driving power supply control circuit with low standby power consumption

Abstract

The utility model discloses an LED bridge-type two-wire dimming driving power supply control circuit with low standby power consumption, 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; and the working circuit power supply circuit is connected with the light source, supplies power to the light source through the working circuit power supply circuit, and can realize off-line output. The control circuit comprises a control module, an on-off detection circuit, a standby control circuit and a bridge type two-wire dimming driving circuit, the control module detects the on-off state through the on-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 light source through the bridge type two-line dimming drive circuit and controls the working state of the light source, and the whole circuit achieves complete compatibility of three-line dimming, two-line dimming and main and auxiliary dimming.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lamps and lanterns especially relates to a low standby power consumption's LED bridge type two line dimming drive power control circuit. BACKGROUND

[0002] The efficiency and standby power consumption of electric appliances in daily use are particularly important. Work efficiency and standby power consumption are long-term time, and the working time of some electric appliances may be only 2 hours a day, but the standby time under normal conditions is close to 24 hours. Therefore, low standby power consumption and high work efficiency are a must for electric appliances. The index is quantified and evaluated, which meets the national strategic demand of low-carbon life and carbon neutralization of various industries.

[0003] Taking the current intelligent lighting industry as an example, the standby power consumption of intelligent LED power supply is relatively high, about 1W, and when the power is lower than a certain value, the PF correction circuit cannot work normally, resulting in low work efficiency of low-power segment equipment, which needs to be improved and optimized. On some types of dimming LED lamps, due to the size of the connected channel and the complexity of the line connection, it is necessary to change the three-wire connection mode of one positive and two negative to a bridge type two-wire mode to achieve lower cost and higher production efficiency. SUMMARY

[0004] The main purpose of the utility model is to provide a low standby power consumption LED bridge type two line dimming drive power control circuit which adopts a bridge type two line mode and can realize lower cost and higher production efficiency.

[0005] The utility model provides a low standby power consumption LED bridge type two line dimming drive power control circuit, including module power supply circuit, working circuit power supply circuit and control circuit;

[0006] 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 light source and supplies power to the light source through the working circuit power supply circuit, and the working circuit power supply circuit can realize 24V and 36V double-way output;

[0007] The control circuit includes a control module, an on-off power detection circuit, a standby control circuit and a bridge type two line dimming drive circuit, the control module detects the on-off power state through the on-off power detection circuit, 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, and the control module is connected with the light source through the bridge type two line dimming drive circuit and controls the working state of the light source;

[0008] The bridge two-wire dimming drive circuit comprises MOS tubes M2, M3, M4 and M9, diodes D14 and D15, the four MOS tubes M2, M3, M4 and M9 form an H-bridge, wherein the sources of the MOS tubes M4 and M9 are connected with the working circuit power supply circuit, the sources of the MOS tubes M2 and M3 are grounded, the gates of the MOS tubes M2, M3, M4 and M9 are connected with the control module, the drains of the MOS tubes M2 and M4 are connected with the first dimming drive output pin, the drains of the MOS tubes M3 and M9 are connected with the third dimming drive output pin, the drains of the MOS tubes M2 and M4 are connected with the second dimming drive output pin through the diode D14, and the drains of the MOS tubes M3 and M9 are connected with the second dimming drive output pin through the diode D15.

[0009] Preferably, an external feedback adjustment circuit is further included, which is connected with the working circuit power supply circuit, and the output voltage of the working circuit power supply circuit can be adjusted through the external feedback adjustment circuit.

[0010] Preferably, the on-off power detection circuit comprises diodes D7 and D8, capacitors CP8, CP9 and CP10, CP11, resistors R23, R24, R25 and R26, a triode Q6 and a photo-coupler G1.

[0011] One end of the capacitor CP8 is connected with the AC neutral line ACL, the other end of the capacitor CP8 is connected with the ACN through the diode D7 and with the input end of the photo-coupler G1 through the resistor R24, the output end of the photo-coupler G1 is connected with the base of the triode Q6, the collector of the triode Q6 is connected with one pin of the control module, and the on-off power detection circuit can be used to stably judge the AC on-off.

[0012] Preferably, the control module comprises a control module body, an external module interface and a pluggable intelligent module, the pluggable intelligent module can be connected with the control module body through the external module interface, and the functions and expandability of the product can be improved by replacing the pluggable intelligent modules with different functions and versions.

[0013] Preferably, the standby control circuit comprises resistors R15, R16, R17, R18, R19, R20 and R21, triodes Q2, Q3 and Q4, diodes D5 and D9 and a photo-coupler G1.

[0014] One pin of the control module is connected with the input end of the photo-coupler G1 through the resistor R21, the output end of the photo-coupler G1 is connected with the base of the triode Q3, the base of the triode Q4 and the base and the collector of the triode Q2 respectively, the emitter of the triode Q3 and the emitter of the triode Q4 are grounded, the collector of the triode Q4 is connected with the base of the triode Q3, the collector of the triode Q3 and the emitter of the triode Q2 are connected with one end of the diode D5 and D9 through the resistor R15 and the resistor R16 respectively, the other end of the diode D5 and D9 is connected with the power supply circuit of the working circuit.

[0015] Preferably, the control circuit further comprises a short-circuit protection control circuit, through which the bridge two-wire dimming drive circuit is protected from short circuit.

[0016] Preferably, the short-circuit protection control circuit comprises a voltage trigger circuit, a delay reset circuit and a control output circuit, the voltage trigger circuit comprises a resistor R35 and a triode Q7, the delay reset circuit comprises resistors R36, R37 and R38 and a capacitor CP12, and the control output circuit comprises triodes Q8, Q9 and Q10 and resistors R33, R34 and R39.

[0017] The low standby power LED bridge two-wire dimming drive power supply control circuit has the following advantages:

[0018] 1. The H-bridge composed of MOS tubes M2, M3, M4 and M9 and the three-way output formed by diodes D14 and D15 can achieve the design purposes of lower cost and higher production efficiency.

[0019] 2. The external module interface can be connected with the control module body through the plug-in intelligent module, and the function and expandability of the product can be improved by replacing the plug-in intelligent module with different functions and versions.

[0020] 3. The short-circuit protection control circuit adopts the high-speed protection delay architecture composed of discrete components, which solves the problems of short-circuit protection and cost in the industry.

[0021] 4. The independent module power supply circuit can solve the power supply stability problem caused by the control module transceiver.

[0022] 5. The independent standby control circuit can achieve ultra-low standby power consumption and solve the prominent standby problem in the industry.

[0023] 6. The auxiliary light control circuit can realize the function expansion of the main light and the auxiliary light, support the power adaptation application problem, and fully solve the cost problem of the main and auxiliary power supply.

[0024] 7. The low-power-consumption fast power-on / off detection is realized through the power-on / off detection circuit, the detection failure problem and speed problem caused by the X capacitor voltage residual due to the alternating current phase are solved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The whole application block diagram of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0026] Figure 2 The circuit diagram of the whole control circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0027] Figure 3 The circuit diagram of the external feedback regulation circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0028] Figure 4 The circuit diagram of the module power supply circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0029] Figure 5 The circuit diagram of the power-on / off detection circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0030] Figure 6 The circuit diagram of the bridge type two-wire dimming drive circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0031] Figure 7 The circuit diagram of the standby control circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0032] Figure 8 The circuit diagram of the auxiliary light drive control circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0033] Figure 9 The circuit diagram of the bridge type two-wire dimming drive circuit of the low standby power consumption LED bridge type two-wire dimming drive power supply control circuit of the utility model;

[0034] The figure label: 1, working circuit power supply circuit, 2, light source, 3, module power supply circuit, 4, control circuit, 5, external feedback regulation circuit, 11, EMC circuit, 12, AC rectifier circuit, 13, PF correction circuit, 14, DCDC primary circuit, 15, DCDC secondary circuit and DCDC output circuit, 41, on-off power detection circuit, 42, standby control circuit, 43, control module, 44, bridge two-wire dimming drive circuit, 45, short-circuit protection control circuit, 47, auxiliary light drive control circuit, 431, external Internet of Things module.

[0035] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0037] Reference Figures 1 to 8 An embodiment of the low standby power consumption LED bridge two-wire dimming drive power supply control circuit of the utility model is proposed:

[0038] A low standby power consumption LED bridge two-wire dimming drive power supply control circuit, comprising a module power supply circuit 3, a working circuit power supply circuit 1, a control circuit 4, an external feedback regulation circuit 5 and a light source 2.

[0039] The working circuit power supply circuit 1 comprises an EMC circuit 11, an AC rectifier circuit 12, a PFC correction circuit 13, a DCDC primary circuit 14 and a DCDC secondary circuit and DCDC output circuit 15, the input end of the EMC circuit 11 is connected with commercial power, the output end of the EMC circuit 11 is connected with the input end of the AC rectifier circuit 12, the output end of the AC rectifier circuit 12 is connected with the input end of the PFC correction circuit 13, the output end of the PFC correction circuit 13 is connected with the input end of the DCDC primary circuit 14, the output end of the DCDC primary circuit 14 is connected with the input end of the DCDC secondary circuit and DCDC output circuit 15, and the output end of the DCDC secondary circuit and DCDC output circuit 15 is connected with the light source 2.

[0040] The module power supply circuit 3 is connected with the control circuit 4 and supplies power to the control circuit 4 through the module power supply circuit 3, the working circuit power supply circuit 1 is connected with the light source 2 and supplies power to the light source 2 through the working circuit power supply circuit 1. The chip U1 in the module power supply circuit 3 generates 15V and 3.3V power supply for the control circuit 4 through the transformer L2.

[0041] The external feedback regulating circuit 5 includes a dialable resistor KT1 arranged externally, and the control signal is input to the DCDC primary circuit 14 by dialing the dialable resistor KT1 to regulate the output voltage of the working circuit power supply circuit. In this embodiment, the voltage is regulated based on 36V.

[0042] 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 bridge two-wire dimming drive circuit 44. The control module 43 includes a control module body, an external module interface, and an external Internet-of-Things module 431, which can be connected to the control module body through the external module interface, and the functionality and expandability of the product can be improved by replacing external Internet-of-Things modules 431 of different functions and versions.

[0043] The power-on / off detection circuit 41 includes diodes D7 and D8, capacitors CP8, CP9, and CP10, resistors R23, R24, R25, and R26, a triode Q1, and an optocoupler G1. One end of the capacitor CP8 is connected to the AC live wire ACL, the other end of the capacitor CP8 is connected to ACN through the diode D7 and to the input end of the optocoupler G1 through the resistor R24, the output end of the optocoupler G1 is connected to the base of the triode Q6, and the collector of the triode Q6 is connected to one of the pins of the control module. By arranging the power-on / off detection circuit, the AC power-on / off can be stably judged. The AC power is coupled to the capacitor CP9 through the diode D8 by the principle of direct current blocking and alternating current passing of the capacitor CP8, the current-limiting resistor R24 drives the optocoupler G1 to generate a control signal at the triode Q6 on the other side of the optocoupler G1; when the ACL is powered on, the triode Q6 is turned off, outputting a high level to the control module, and vice versa.

[0044] The standby control circuit 42 comprises 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 the optocoupler G1 through the resistor R21, the output of the optocoupler G1 is connected to the base of the transistor Q3, the base of the transistor Q4 and the base and collector of the transistor Q2, the emitter of the transistor Q3 and the emitter of the transistor Q4 are grounded, the collector of the transistor Q4 is connected to the base of the transistor Q3, the collector of the transistor Q3 and the emitter of the transistor Q2 are connected to one end of the diodes D5 and D9 through the resistors R15 and R16, respectively, and the other end of the diodes D5 and D9 is connected to the power supply circuit of the working circuit. When it is needed to turn on the power supply circuit 1 of the working circuit, the control module 43 drives the optocoupler G2 through the resistor R21, so that the transistor Q4 is turned off, the transistors Q2 and Q3 are turned on, and thus the power supply circuit 1 of the working circuit works normally. When it is needed to turn off the power supply circuit 1 of the working circuit, the control module 43 drives the optocoupler G2 through the resistor R21, so that the transistor Q4 is turned on, the transistors Q2 and Q3 are turned off, and thus the power supply circuit 1 of the working circuit stops working, achieving 0 power consumption.

[0045] The bridge two-wire dimming driving circuit 44 comprises MOS transistors M2, M3, M4 and M9, and diodes D14 and D15. The four MOS transistors M2, M3, M4 and M9 form an H-bridge, wherein the sources of the MOS transistors M4 and M9 are connected to the power supply circuit 1 of the working circuit, the sources of the MOS transistors M2 and M3 are grounded, the gates of the MOS transistors M2, M3, M4 and M9 are connected to the control module 43, the drains of the MOS transistors M2 and M4 are connected to the first dimming driving output pin, the drains of the MOS transistors M3 and M9 are connected to the third dimming driving output pin, the drains of the MOS transistors M2 and M4 are connected to the output positive through the diode D14, and the drains of the MOS transistors M3 and M9 are connected to the output positive through the diode D15.

[0046] The working state of the light source 2 is controlled through the first dimming driving output pin, the output positive and the third dimming driving output pin, so that two-wire or three-wire dimming can be realized.

[0047] The short-circuit protection control circuit 45 comprises a voltage trigger circuit, a delay reset circuit and a control output circuit. The voltage trigger circuit comprises a resistor R35 and a transistor Q7, the delay reset circuit comprises resistors R36, R37 and R38 and a capacitor CP12, and the control output circuit comprises transistors Q8, Q9 and Q10 and resistors R33, R34 and R39.

[0048] The auxiliary light drive control circuit 47 comprises 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, MOS tube M9 and voltage stabilizing tube Z2.

[0049] An output pin of the control module 43 is connected with the resistor R81, and then connected with the base of the transistor Q21 and the collector of the transistor Q27, respectively; the collector of the transistor Q21 is connected with the base of the transistor Q23; the collector of the transistor Q23 is connected with the base of the transistor Q24 and the base of the transistor Q25, respectively; the emitters of the transistors Q24 and Q25 are connected with the gate of the MOS tube M9; the drain of the MOS tube M9 is connected with the auxiliary light source 6; the source of the MOS tube M9 is connected with the ground through the resistors R92, R93, R94 and R95, respectively; and the emitters of the transistors Q21, Q23 and Q24 are connected with the ground.

[0050] The source of the MOS tube M9 is connected with the base of the transistor Q22 through the resistor R89; the collector of the transistor Q22 is connected with the base of the transistor Q26 through the resistor R87; and the collector of the transistor Q26 is connected with the base of the transistor Q27. The output end of the module power supply circuit 3 is connected with the collectors of the transistors Q22 and Q26 through the resistors R83 and R85, respectively, after passing through the resistors R90 and R91.

[0051] When in standby, the standby control circuit 42 turns off the power supply of all working circuits, and at this time, the standby power consumption of the working circuit power supply circuit 1 is "0", only the power consumption of the module power supply circuit 3 and the power consumption of the on-off detection circuit 41, so as to realize the complete standby state, thereby realizing the design purpose.

[0052] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields according to the content of the present application is also included in the patent protection range of the present application.

Claims

1. A low standby power LED bridge two-wire dimming drive power supply control circuit, characterized in that, It comprises a module power supply circuit, a working circuit power supply circuit and a control circuit; The module power supply circuit is connected with the control circuit and supplies power to the control circuit through the module power supply circuit, and the working circuit power supply circuit is connected with a light source and supplies power to the light source through the working circuit power supply circuit, and the working circuit power supply circuit can realize 24V and 36V double-way output; The control circuit comprises a control module, a power-on / off detection circuit, a standby control circuit and a bridge two-wire dimming drive circuit, the control module detects the power-on / off state through the power-on / off detection circuit, 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, and the control module is connected with the light source through the bridge two-wire dimming drive circuit and controls the working state of the light source; The bridge two-wire dimming drive circuit comprises MOS tubes M2, M3, M4 and M9, diodes D14 and D15, four MOS tubes M2, M3, M4 and M9 form an H-bridge, wherein the sources of MOS tubes M4 and M9 are connected with the working circuit power supply circuit, the sources of MOS tubes M2 and M3 are grounded, the gates of MOS tubes M2, M3, M4 and M9 are connected with the control module, the drains of MOS tubes M2 and M4 are connected with a first dimming drive output pin, the drains of MOS tubes M3 and M9 are connected with a third dimming drive output pin, the drains of MOS tubes M2 and M4 are connected with a second dimming drive output pin through diode D14, and the drains of MOS tubes M3 and M9 are connected with the second dimming drive output pin through diode D15.

2. The low standby power consumption LED bridge two-wire dimming power supply control circuit according to claim 1, characterized in that, It further comprises an external feedback adjustment circuit, which is connected with the working circuit power supply circuit.

3. The low standby power LED bridge two-wire dimming drive power supply control circuit according to claim 1, characterized in that, The power-on / off detection circuit comprises diodes D7 and D8, capacitors CP8, CP9 and CP10, CP11, resistors R23, R24, R25 and R26, a triode Q6 and a photo-coupler G1; One end of capacitor CP8 is connected with an AC zero line ACL, the other end of capacitor CP8 is connected with ACN through diode D7 and connected with the input end of photo-coupler G1 through resistor R24, the output end of photo-coupler G1 is connected with the base of triode Q6, the collector of triode Q6 is connected with one of the pins of the control module, and the power-on / off detection circuit can stably judge the AC power-on / off.

4. The low standby power consumption LED bridge two-wire dimmer drive power supply control circuit according to claim 1, characterized in that, The control module comprises a control module body, an external module interface and a pluggable intelligent module, the pluggable intelligent module can be connected with the control module body through the external module interface, and the function and expandability of the product can be improved by replacing the pluggable intelligent module with different functions and versions.

5. The low standby power LED bridge two-wire dimming drive power supply control circuit according to claim 1, characterized in that, The standby control circuit comprises resistors R15, R16, R17, R18, R19, R20 and R21, transistors Q2, Q3 and Q4, diodes D5 and D9, and photo-coupler G1; One pin of the control module is connected with the input end of photo-coupler G1 through resistor R21, the output end of photo-coupler G1 is connected with the base of transistor Q3, the base of transistor Q4 and the base and collector of transistor Q2 respectively, the emitter of transistor Q3 and the emitter of transistor Q4 are grounded, the collector of transistor Q4 is connected with the base of transistor Q3, the collector of transistor Q3 and the emitter of transistor Q2 are connected with one end of diodes D5 and D9 through resistors R15 and R16 respectively, the other end of diodes D5 and D9 is connected with the power supply circuit of the working circuit.

6. The low standby power consumption LED bridge two-wire dimmer power supply control circuit according to claim 1, wherein, The control circuit further comprises a short-circuit protection control circuit, which is used for performing short-circuit protection on the output of the bridge two-wire dimming driving circuit.

7. The low standby power consumption LED bridge two-wire dimmer drive power supply control circuit according to claim 6, characterized in that, The short-circuit protection control circuit comprises a voltage trigger circuit, a delay reset circuit and a control output circuit, the voltage trigger circuit comprises resistor R35 and transistor Q7, the delay reset circuit comprises resistors R36, R37 and R38 and capacitor CP12, and the control output circuit comprises transistors Q8, Q9 and Q10 and resistors R33, R34 and R39.

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