Dimming touch control table lamp circuit of LED driving power supply

Abstract

The utility model relates to the technical field of LEDs, in particular to a dimming touch control table lamp circuit of an LED driving power supply, which comprises a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit and a main control circuit which are connected with one another through mutual connection. A common single-key single-output touch dimming circuit and a single-key single-output touch non-dimming circuit are combined, double-key double-output stepless dimming is achieved, a common single-key single-channel dimming touch circuit in the market is used, an LED can achieve various dimming functions according to different use requirements, and the dimming effect is good. Meanwhile, the dimming pin of the main control circuit is connected with the negative electrode of the LED rather than the dimming pin of the driving circuit is connected with the negative electrode of the LED, so that the dimming stability is greatly improved, the heating problem caused by an internal switch of the driving circuit is reduced, meanwhile, the driving circuit without a dimming function can be used, and the diversification of actual application scenes is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of LED, and particularly designs a dimming touch control desk lamp circuit for an LED driving power supply. Background Technique

[0002] Based on the current touch control dimming circuits on the market, the touch control IC needs to have embedded capabilities requirements for users according to different usage scenarios, and be programmed and burned according to the actual situation, which causes many inconveniences to R & D and customer use. At the same time, the dimming on the market is directly connected to the dimming pin of the driving circuit IC, which easily causes the dimming linear curve to be uneven, resulting in jitter and mutation during dimming, affecting the user experience at the customer end. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a dimming touch control desk lamp circuit for an LED driving power supply.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A dimming touch control desk lamp circuit for an LED driving power supply includes a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit and a main control circuit; the LED driving circuit includes a first LED driving branch and a second LED driving branch;

[0006] The single-channel touch dimming circuit is electrically connected to the main control circuit, the main control circuit is respectively electrically connected to the first LED driving branch and the second LED driving branch, and the enable end of the first LED driving branch is set to be in a long-term effective state;

[0007] The single-channel touch non-dimming circuit is electrically connected to the main control circuit, and the main control circuit is electrically connected to the enable end of the second LED driving branch through the LED push-pull circuit; both the first LED driving branch and the second LED driving branch are used to be electrically connected to the LED lamp of the desk lamp.

[0008] Further, the single-channel touch dimming circuit includes a chip U1 and a touch spring TOUCH1; the model of the chip U1 is SGL8022W;

[0009] The fifth pin of the chip U1 is electrically connected to the touch spring TOUCH1, the seventh pin of the chip U1 is electrically connected to the eighth pin of the main control chip U6 of the main control circuit, and the ninth pin of the main control chip U6 of the main control circuit is respectively electrically connected to the first LED driving branch and the second LED driving branch.

[0010] Further, the first LED driving branch includes a chip U3 and a first MOS unit; the model of the chip U3 is DW8501;

[0011] The enable terminal of the chip U3 is connected to the power supply terminal. The output pin of the chip U3 is electrically connected to the source electrode of the first MOS unit. The ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate electrode of the first MOS unit. The drain electrode of the first MOS unit is electrically connected to the LED lamp of the table lamp.

[0012] Further, the first MOS unit includes MOS transistor Q1, MOS transistor Q2, and MOS transistor Q3;

[0013] The source electrodes of the MOS transistor Q1, the MOS transistor Q2, and the MOS transistor Q3 are all electrically connected to the output pin of the chip U3. The gate electrodes of the MOS transistor Q1, the MOS transistor Q2, and the MOS transistor Q3 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit. The drain electrodes of the MOS transistor Q1, the MOS transistor Q2, and the MOS transistor Q3 are all electrically connected to the LED lamp of the table lamp.

[0014] Further, the single-channel touch non-dimming circuit includes chip U2 and touch spring TOUCH2; the model of the chip U2 is TTP223-BA6;

[0015] The third pin of the chip U2 is electrically connected to the touch spring TOUCH2. The first pin of the chip U2 is electrically connected to the seventh pin of the main control chip U6 of the main control circuit. The tenth pin of the main control chip U6 of the main control circuit is electrically connected to the LED push-pull circuit.

[0016] Further, the LED push-pull circuit includes transistor Q7, transistor Q8, and transistor Q9;

[0017] The tenth pin of the main control chip U6 of the main control circuit is electrically connected to the base electrode of the transistor Q7. The collector electrode of the transistor Q7 is electrically connected to the base electrodes of the transistor Q8 and the transistor Q9 respectively. The emitter electrode of the transistor Q8 and the collector electrode of the transistor Q9 are electrically connected and are electrically connected to the enable terminal of the second LED drive branch.

[0018] Further, the transistor Q7 and the transistor Q8 are both NPN type, and the transistor Q9 is PNP type.

[0019] Further, the second LED drive branch includes chip U4 and a second MOS unit; the model of the chip U4 is DW8501;

[0020] The enable terminals of the chip U4 are respectively connected to the emitter of the triode Q8 and the collector of the triode Q9. The output pin of the chip U4 is electrically connected to the source electrode of the second MOS unit. The ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the second MOS unit. The drain electrode of the second MOS unit is electrically connected to the LED lamp of the table lamp.

[0021] Further, the second MOS unit includes an MOS transistor Q4, an MOS transistor Q5, and an MOS transistor Q6;

[0022] The source electrodes of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the output pin of the chip U4. The gate electrodes of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit. The drain electrodes of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the LED lamp of the table lamp.

[0023] Further, a power supply circuit is further included, and the power supply circuit is respectively electrically connected to the single-channel touch dimming circuit, the single-channel touch non-dimming circuit, the LED driving circuit, the LED push-pull circuit, and the main control circuit.

[0024] The beneficial effects of the present invention are as follows:

[0025] A dimming touch control table lamp circuit of an LED driving power supply provided by the present invention includes a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit, and a main control circuit. Through the connection relationships among them, the combination of a common single-button single-output touch dimming circuit and a single-button single-output touch non-dimming circuit is realized, and dual-button dual-output stepless dimming is achieved. No embedded experience is required, and a common single-button single-channel dimming touch circuit on the market can be used. Various dimming functions of the LED can be realized according to different usage requirements without a complex programming and burning process. At the same time, the dimming pin of the main control circuit is connected to the negative electrode of the LED instead of using the dimming pin of the driving circuit to be connected to the negative electrode of the LED, which greatly improves the dimming stability and reduces the heating problem caused by the internal switch of the driving circuit. At the same time, a driving circuit without a dimming function can also be used, which greatly increases the diversification of actual application scenarios. Description of the Drawings

[0026] Figure 1 Shown is the circuit connection diagram of the single-channel touch dimming circuit of a dimming touch control table lamp circuit of an LED driving power supply of the present invention;

[0027] Figure 2 Shown is the circuit connection diagram of the single-channel touch non-dimming circuit of a dimming touch control table lamp circuit of an LED driving power supply of the present invention;

[0028] Figure 3 The circuit connection diagram of the LED push-pull circuit of the dimming touch desk lamp circuit of an LED driving power supply of the present utility model is shown;

[0029] Figure 4 The circuit connection diagram of the LED driving circuit of the dimming touch desk lamp circuit of an LED driving power supply of the present utility model is shown;

[0030] Figure 5 The circuit connection diagram of the power supply circuit of the dimming touch desk lamp circuit of an LED driving power supply of the present utility model is shown;

[0031] Figure 6 The circuit connection diagram of the main control circuit of the dimming touch desk lamp circuit of an LED driving power supply of the present utility model is shown. Specific embodiments

[0032] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments as follows:

[0033] As Figures 1 - 6 shown, a dimming touch desk lamp circuit of an LED driving power supply provided by the present utility model includes a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit and a main control circuit; the LED driving circuit includes a first LED driving branch and a second LED driving branch;

[0034] The single-channel touch dimming circuit is electrically connected to the main control circuit, the main control circuit is respectively electrically connected to the first LED driving branch and the second LED driving branch, and the enable end of the first LED driving branch is set to be in a long-term effective state;

[0035] The single-channel touch non-dimming circuit is electrically connected to the main control circuit, and the main control circuit is electrically connected to the enable end of the second LED driving branch through the LED push-pull circuit; both the first LED driving branch and the second LED driving branch are used to be electrically connected to the LED lamp of the desk lamp.

[0036] It can be seen from the above description that the present utility model has the following beneficial effects:

[0037] A dimming touch desk lamp circuit for an LED driving power supply provided by the present utility model includes a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit and a main control circuit. Through the connection relationships among them, it realizes the combination of a common single-button single-output touch dimming circuit and a single-button single-output touch non-dimming circuit, achieves double-button double-output stepless dimming. Without the need for embedded experience, it can use the common single-button single-channel dimming touch circuit on the market. Without a complex programming and burning process, the LED can achieve various dimming functions according to different usage requirements. At the same time, the dimming pin of the main control circuit is connected to the negative pole of the LED instead of using the dimming pin of the driving circuit to be connected to the negative pole of the LED, which greatly improves the dimming stability and reduces the heating problem caused by the internal switch of the driving circuit. At the same time, a driving circuit without a dimming function can also be used, greatly increasing the diversification of actual application scenarios.

[0038] Further, the single-channel touch dimming circuit includes a chip U1 and a touch spring TOUCH1; the model of the chip U1 is SGL8022W;

[0039] The fifth pin of the chip U1 is electrically connected to the touch spring TOUCH1, the seventh pin of the chip U1 is electrically connected to the eighth pin of the main control chip U6 of the main control circuit, and the ninth pin of the main control chip U6 of the main control circuit is respectively electrically connected to the first LED driving branch and the second LED driving branch.

[0040] As can be seen from the above description, through the above specific circuit design, the touch acquisition function of the single-channel touch dimming circuit and the function of feedback to the main control chip for analog-to-digital conversion are realized, and are used to control the first LED driving branch and the second LED driving branch.

[0041] Further, the first LED driving branch includes a chip U3 and a first MOS unit; the model of the chip U3 is DW8501;

[0042] The enable end of the chip U3 is connected to the power supply end, the output pin of the chip U3 is electrically connected to the source of the first MOS unit, the ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the first MOS unit, and the drain of the first MOS unit is electrically connected to the LED lamp of the desk lamp.

[0043] As can be seen from the above description, through the above specific circuit design, the LED driving function is realized.

[0044] Further, the first MOS unit includes a MOS transistor Q1, a MOS transistor Q2 and a MOS transistor Q3;

[0045] The source electrodes of MOS transistor Q1, MOS transistor Q2, and MOS transistor Q3 are all electrically connected to the output pin of chip U3. The gate electrodes of MOS transistor Q1, MOS transistor Q2, and MOS transistor Q3 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit. The drain electrodes of MOS transistor Q1, MOS transistor Q2, and MOS transistor Q3 are all electrically connected to the LED lamp of the table lamp.

[0046] As can be seen from the above description, through the above specific circuit design, MOS transistor Q1, MOS transistor Q2, and MOS transistor Q3 jointly form the first MOS unit, serving as the control switch for controlling the state of the LED lamp of the table lamp.

[0047] Furthermore, the single-channel touch non-dimming circuit includes chip U2 and touch spring TOUCH2; the model of chip U2 is TTP223-BA6.

[0048] The third pin of chip U2 is electrically connected to touch spring TOUCH2. The first pin of chip U2 is electrically connected to the seventh pin of the main control chip U6 of the main control circuit. The tenth pin of the main control chip U6 of the main control circuit is electrically connected to the LED push-pull circuit.

[0049] As can be seen from the above description, through the above specific circuit design, the touch acquisition function of the single-channel touch non-dimming circuit and the function of feeding back to the main control chip for analog-to-digital conversion are realized, and the LED push-pull circuit is electrically connected to the enable terminal of the second LED drive branch.

[0050] Furthermore, the LED push-pull circuit includes triode Q7, triode Q8, and triode Q9.

[0051] The tenth pin of the main control chip U6 of the main control circuit is electrically connected to the base of triode Q7. The collector of triode Q7 is electrically connected to the bases of triode Q8 and triode Q9 respectively. The emitter of triode Q8 and the collector of triode Q9 are electrically connected and are electrically connected to the enable terminal of the second LED drive branch.

[0052] Furthermore, both triode Q7 and triode Q8 are NPN type, and triode Q9 is PNP type.

[0053] As can be seen from the above description, through the above specific circuit design, the corresponding function of the LED push-pull circuit is realized.

[0054] Furthermore, the second LED drive branch includes chip U4 and the second MOS unit; the model of chip U4 is DW8501.

[0055] The enable terminals of the chip U4 are respectively connected to the emitter of the triode Q8 and the collector of the triode Q9. The output pin of the chip U4 is electrically connected to the source of the second MOS unit. The ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the second MOS unit. The drain of the second MOS unit is electrically connected to the LED lamp of the table lamp.

[0056] As can be seen from the above description, through the above specific circuit design, the LED driving function is realized.

[0057] Further, the second MOS unit includes MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6.

[0058] The sources of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the output pin of the chip U4. The gates of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit. The drains of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the LED lamp of the table lamp.

[0059] As can be seen from the above description, through the above specific circuit design, the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 together form the second MOS unit, which serves as a control switch for controlling the state of the LED lamp of the table lamp.

[0060] Further, a power supply circuit is further included, and the power supply circuit is respectively electrically connected to the single-channel touch dimming circuit, the single-channel touch non-dimming circuit, the LED driving circuit, the LED push-pull circuit, and the main control circuit.

[0061] As can be seen from the above description, the power supply circuit is provided to respectively supply power to the single-channel touch dimming circuit, the single-channel touch non-dimming circuit, the LED driving circuit, the LED push-pull circuit, and the main control circuit to provide an operating basis.

[0062] Several preferred embodiments or application embodiments are listed below to help those skilled in the art better understand the technical content of the present invention and the technical contributions made by the present invention compared with the prior art:

[0063] Preferred Embodiment 1:

[0064] Such as Figures 1 to 6, a dimming touch desk lamp circuit for an LED driving power supply provided by the present utility model includes a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit, a main control circuit, and a power supply circuit; the power supply circuit is electrically connected to the single-channel touch dimming circuit, the single-channel touch non-dimming circuit, the LED driving circuit, the LED push-pull circuit, and the main control circuit respectively. The LED driving circuit includes a first LED driving branch and a second LED driving branch;

[0065] The single-channel touch dimming circuit is electrically connected to the main control circuit, the main control circuit is electrically connected to the first LED driving branch and the second LED driving branch respectively, and the enable end of the first LED driving branch is set to a long-term effective state;

[0066] The single-channel touch non-dimming circuit is electrically connected to the main control circuit, and the main control circuit is electrically connected to the enable end of the second LED driving branch through the LED push-pull circuit; both the first LED driving branch and the second LED driving branch are used to be electrically connected to the LED lamp of the desk lamp.

[0067] The above-mentioned single-channel touch dimming circuit includes a chip U1 and a touch spring TOUCH1; the model of the chip U1 is SGL8022W;

[0068] The fifth pin of the chip U1 is electrically connected to the touch spring TOUCH1, the seventh pin of the chip U1 is electrically connected to the eighth pin of the main control chip U6 of the main control circuit, and the ninth pin of the main control chip U6 of the main control circuit is electrically connected to the first LED driving branch and the second LED driving branch respectively.

[0069] In this embodiment, the first LED driving branch includes a chip U3 and a first MOS unit; the model of the chip U3 is DW8501; the enable end of the chip U3 is connected to the power supply end, the output pin of the chip U3 is electrically connected to the source of the first MOS unit, the ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the first MOS unit, and the drain of the first MOS unit is electrically connected to the LED lamp of the desk lamp. Among them, the first MOS unit includes MOS transistors Q1, Q2, and Q3; the sources of the MOS transistors Q1, Q2, and Q3 are all electrically connected to the output pin of the chip U3, the gates of the MOS transistors Q1, Q2, and Q3 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit, and the drains of the MOS transistors Q1, Q2, and Q3 are all electrically connected to the LED lamp of the desk lamp.

[0070] The above single-channel touch dimming circuit further includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, and a light-emitting diode BLUE1. The specific connections are as Figure 1 shown. The specifications of the resistor R1 and the resistor R2 are both 1K / 0603; the specifications of the resistor R3, the resistor R4, the resistor R5, and the resistor R6 are all 0R / 0603; the specification of the resistor R7 is 47K / 0603; the specification of the capacitor C1 is 100nF / 50V / 0805; the specification of the capacitor C2 is 10nF / 50V / 0805;

[0071] The resistor R1 is respectively connected to the 3.3V voltage stabilizer and the positive electrode of the light-emitting diode BLUE1, playing a current-limiting role; the positive electrode end of the light-emitting diode BLUE1 is connected to the resistor R1, and the negative electrode end is connected to the GND ground, playing the role of a power indicator. When it lights up, it means that the chip U1 is powered normally, and when it goes out, it means that the chip U1 is powered abnormally; one end of the capacitor C1 is connected to the 3.3V voltage stabilizer and the VDD pin of the chip U1, and the other end is connected to the GND ground, playing a filtering role; one end of the capacitor C2 is connected to the VCC pin of the chip U1, and the other end is grounded, playing the role of controlling the touch sensitivity. The larger the capacitance, the higher the sensitivity; one end of the resistor R2 touches the touch spring TOUCH1, and the other end is connected to the T1 pin of the chip U1, playing a current-limiting role to avoid false triggering caused by spring jitter; one end of the resistor R3 and one end of the resistor R5 are connected and electrically connected to the OPT2 pin of the chip U1. The other end of the resistor R3 is electrically connected to the 3.3V voltage stabilizer, and the other end of the resistor R5 is grounded; one end of the resistor R4 and one end of the resistor R6 are connected and electrically connected to the OPT1 pin of the chip U1. The other end of the resistor R4 is electrically connected to the 3.3V voltage stabilizer, and the other end of the resistor R6 is grounded;

[0072] When the resistor R3 is soldered and the resistor R5 is not soldered, OPT2 = 1. On the contrary, when the resistor R5 is soldered and the resistor R3 is not soldered, OPT2 = 0. Similarly, when the resistor R4 is soldered and the resistor R6 is not soldered, OPT1 = 1. On the contrary, when the resistor R6 is soldered and the resistor R4 is not soldered, OPT2 = 0. At this time, the working mode of the chip SGL8022W can be selected according to different needs: (1) When OPT1 = 1 and OPT2 = 1, the chip has stepless dimming without brightness buffering and without memory function. (2) When OPT1 = 0 and OPT2 = 1, the chip has stepless dimming with brightness buffering and without memory function. (3) When OPT1 = 1 and OPT2 = 0, the chip has stepless dimming with brightness buffering and with memory function. (4) When OPT1 = 0 and OPT2 = 0, the chip has three-stage dimming and its own memory function; one end of the resistor R7 is connected to the 3.3V voltage stabilizer, and the other end is connected to the OSC pin of the chip U1, introducing current to the frequency compensation element of the internal error amplifier of the chip SGL8022W and playing a current-limiting role at the same time.

[0073] The single-channel touch non-dimming circuit includes a chip U2 and a touch spring TOUCH2; the model of the chip U2 is TTP223-BA6;

[0074] The third pin of the chip U2 is electrically connected to the touch spring TOUCH2, the first pin of the chip U2 is electrically connected to the seventh pin of the main control chip U6 of the main control circuit, and the tenth pin of the main control chip U6 of the main control circuit is electrically connected to the LED push-pull circuit.

[0075] The above single-channel touch non-dimming circuit further includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, a capacitor C3, a capacitor C4, and a light-emitting diode BLUE2, and the specific connections are as Figure 2 shown. The specification of the resistor R8 is 1.5K / 0603; the specifications of the resistor R9 and the resistor R10 are both 0R / 0603; the specification of the resistor R11 is 1K / 0603; the specification of the capacitor C3 is 100nF / 50V / 0805; the specification of the capacitor C4 is 4.7nF / 50V / 0805.

[0076] One end of the resistor R8 is respectively connected to the 3.3V voltage regulator and the positive electrode of the light-emitting diode BLUE2, playing a current-limiting role; the positive electrode end of the light-emitting diode BLUE2 is connected to one end of the resistor R8, and the negative electrode end is connected to GND, playing the role of a power indicator. When it lights up, it means that the power supply of the chip U2 is normal, and when it goes out, it means that the power supply of the chip U2 is abnormal; one end of the capacitor C3 is connected to the 3.3V voltage regulator and the VDD pin of the chip U2, and the other end is connected to GND, playing a filtering role; one end of the capacitor C4 is connected to the I pin of the chip U2 and the touch spring TOUCH2, and the other end is connected to GND, playing the role of adjusting the touch sensitivity control. The larger the capacitance, the higher the sensitivity; one end of the resistor R9 is connected to the 3.3V voltage regulator, and the other end is connected to the TOG pin of the chip U2. When the resistor R9 is soldered on the circuit, the TOG pin of the chip U2 is at a high level. At this time, the chip U2 is in the self-locking mode. When the resistor R9 is not soldered on the circuit, the TOG pin of the chip U2 is floating. At this time, the chip U2 is in the momentary mode; one end of the resistor R10 is connected to the 3.3V voltage regulator, and the other end is connected to the AHLB pin of the chip U2. When the resistor R10 is soldered on the circuit, the AHLB pin of the chip U2 is at a high level. At this time, the Q pin output of the chip U2 is in the high-level mode. When the resistor R10 is not soldered on the circuit, the AHLB pin of the chip U2 is at a low level. At this time, the Q pin output of the chip U2 is in the low-level mode; one end of the resistor R11 is connected to the Q pin of the chip U2, and the other end is connected to the output end of the MCU2, playing a current-limiting role.

[0077] The above LED push-pull circuit includes a triode Q7, a triode Q8, and a triode Q9; both the triode Q7 and the triode Q8 are NPN type, and the triode Q9 is PNP type.

[0078] The tenth pin of the main control chip U6 of the main control circuit is electrically connected to the base of the triode Q7. The collector of the triode Q7 is electrically connected to the bases of the triode Q8 and the triode Q9 respectively. The emitters of the triode Q8 and the collector of the triode Q9 are electrically connected and are electrically connected to the enable terminal of the second LED driving branch.

[0079] The above-mentioned LED push-pull circuit further includes a resistor R33, a resistor R34, a resistor R35 and a light-emitting diode BLUE3. The specific circuit connection is as Figure 3 shown. The specification of the resistor R33 is 1K / 0603; the specifications of the resistor R34 and the resistor R35 are both 4.7K / 0603.

[0080] One end of the resistor R33 is connected to the VCC power supply, and the other end is connected to the 3-pin of the triode Q7, playing a voltage-dividing role; one end of the resistor R34 is connected to the START2 input terminal, and the other end is connected to the 1-pin of the triode Q7, playing a current-limiting role; one end of the resistor R35 is respectively connected to the other end of the resistor R33, the 3-pin of the triode Q7, the 1-pin of the triode Q8, and the 1-pin of the triode Q9, and the other end is connected to the positive electrode of the light-emitting diode BLUE3, playing a voltage-dividing and current-limiting role. The negative terminal of the light-emitting diode BLUE3 is connected to the GND ground, playing the role of an indicator light. When it lights up, it means that the EN terminal of the chip U4 is connected to the VCC input terminal, and the chip U4 works normally. When it goes out, it means that the EN terminal of the chip U4 is connected to the GND ground, and the chip U4 stops working. When the I-pin of the chip U2 in the single-channel touch non-dimming circuit is not triggered by the touch spring TOUCH2, the Q-pin of the chip U2 outputs a low level at this time. Then, it is output to the PA1 pin of the main control chip U6 through the MCU2 terminal, and then the digital signal is output to the 1-pin of the triode Q7 through the START2 terminal by the MCU. At this time, the triode Q7 is not conducting, so the VCC power supply input terminal conducts current through the resistor R33 to the 1-pin of the triode Q8. At this time, the triode Q8 conducts, and the VCC power supply passes through the 3-pin and 2-pin of the triode Q8, and through the EN terminal, inputs the VCC power supply to the EN pin of the chip U4, enabling the chip U4 to work normally; when the chip U2 in the single-channel touch non-dimming circuit touches the touch spring TOUCH2, the chip U2 will output a high-level signal. The high-level signal will be conducted to the PA1 pin of the chip U6 through the resistor R34, and then the digital signal is conducted to the 1-pin (B pin) of the triode Q7 through the MCU. At this time, the 2-pin (E pin) and 3-pin (C pin) of the triode Q7 are conducting. The voltage at the end of the resistor R33 connected to the 3-pin of the triode Q7 is zero due to the conduction of the triode Q7. At this time, the voltage at the 1-pin (B pin) of the triode Q8 is zero and it does not conduct. At the same time, since the triode Q9 is a PNP triode, the voltage at the 1-pin (B pin) of the triode Q9 is zero, causing the triode Q9 to be in a conducting state. At this time, the EN terminal is directly connected to the GND ground. Therefore, the EN pin of the chip U4 is also connected to the GND ground, resulting in the chip U4 stopping working.

[0081] The above-mentioned second LED driving branch includes a chip U4 and a second MOS unit; the model of the chip U4 is DW8501;

[0082] The enable terminal of the chip U4 is respectively connected to the emitter of the triode Q8 and the collector of the triode Q9. The output pin of the chip U4 is electrically connected to the source of the second MOS unit. The ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the second MOS unit. The drain of the second MOS unit is electrically connected to the LED lamp of the table lamp.

[0083] Among them, the second MOS unit includes MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6; the source electrodes of MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6 are all electrically connected to the output pins of chip U4, and the gate electrodes of MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit. The drain electrodes of MOS transistor Q4, MOS transistor Q5, and MOS transistor Q6 are all electrically connected to the LED lamp of the table lamp.

[0084] The above LED driving circuit specifically includes resistor R12, resistor R13, resistor R14, resistor R15, resistor R16, resistor R17, resistor R18, resistor R19, resistor R20, resistor R21, resistor R22, resistor R23, resistor R24, resistor R25, resistor R26, resistor R27, resistor R28, resistor R29, resistor R30, resistor R31, electrolytic capacitor CE1, electrolytic capacitor CE2, electrolytic capacitor CE3, electrolytic capacitor CE4, NMOS transistor Q1, NMOS transistor Q2, NMOS transistor Q3, NMOS transistor Q4, NMOS transistor Q5, NMOS transistor Q6, chip U3 (model DW8501) and chip U4 (model DW8501). The specific circuit connection is as Figure 4 shown. The specifications of resistor R12, resistor R13, resistor R14, resistor R15, resistor R16, and resistor R17 are all 8.2R / 1206; the specifications of resistor R18 and resistor R19 are both 1K / 1206; the specification of resistor R20 is 10R / 1206, and the specification of resistor R21 is 10K / 1206; the specifications of resistor R22, resistor R23, resistor R24, resistor R25, resistor R26, and resistor R27 are all 8.2R / 1206; the specifications of resistor R28 and resistor R29 are both 1K / 1206; the specification of resistor R30 is 10R / 1206, and the specification of resistor R31 is 10K / 1206; the specifications of electrolytic capacitor CE1, electrolytic capacitor CE2, electrolytic capacitor CE3, and electrolytic capacitor CE4 are all 10uF / 50V;

[0085] One end of resistor R12, resistor R13, resistor R14, resistor R15, resistor R16 and resistor R17 are commonly connected to the VCC power input terminal, and the other end is commonly connected to LED+, which plays a voltage dividing role, divides the voltage for the linear drive IC, reduces the heat generation of the IC, and extends the service life of the IC; One end of electrolytic capacitor CE1 is connected to the VCC power input terminal, the VDD pin and the EN pin of chip U3, and the other end is connected to GND, which plays a filtering role; One end of resistor R18 and resistor R19 are commonly connected to the RS pin of chip U3, and the other end is commonly connected to GND. By adjusting the resistance values of resistor R18 and resistor R19, the magnitude of the output current is adjusted; One end of resistor R20 is connected to the 1 pin of NMOS transistor Q1, NMOS transistor Q2 and NMOS transistor Q3, and the other end is connected to the START1 signal input terminal, which plays a current limiting role to prevent the MOS transistor from being damaged due to excessive input current; One end of the pull-down resistor R21 is connected to the START1 signal input terminal and resistor R20, and the other end is connected to GND, which plays a voltage dividing role to prevent the MOS transistor from being damaged due to excessive input voltage; One end of electrolytic capacitor CE2 is connected to resistor R12, resistor R13, resistor R14, resistor R15, resistor R16, resistor R17 and LED+, and the other end is connected to GND, which plays a filtering role; The 3 pins of NMOS transistor Q1, NMOS transistor Q2 and NMOS transistor Q3 are connected to LED1-, and the 2 pins are connected to the OUT pin of chip U3. When the 1 pin of the NMOS transistor receives the START1 input signal, the control circuit switches according to different frequencies; One end of resistor R22, resistor R23, resistor R24, resistor R25, resistor R26 and resistor R27 are commonly connected to the VCC power input terminal, and the other end is commonly connected to LED+, which plays a voltage dividing role, divides the voltage for the linear drive IC, reduces the heat generation of the IC, and extends the service life of the IC; One end of electrolytic capacitor CE3 is connected to the VCC power input terminal and the VDD pin of chip U4, and the other end is connected to GND, which plays a filtering role; One end of resistor R28 and resistor R29 are commonly connected to the RS pin of chip U4, and the other end is commonly connected to GND. By adjusting the resistance values of resistor R28 and resistor R29, the magnitude of the output current is adjusted; One end of resistor R30 is connected to the 1 pin of NMOS transistor Q4, NMOS transistor Q5 and NMOS transistor Q6, and the other end is connected to the START1 signal input terminal, which plays a current limiting role to prevent the MOS transistor from being damaged due to excessive input current; One end of the pull-down resistor R31 is connected to the START1 signal input terminal and resistor R30, and the other end is connected to GND, which plays a voltage dividing role to prevent the MOS transistor from being damaged due to excessive input voltage; One end of electrolytic capacitor CE4 is connected to resistor R22, resistor R23, resistor R24, resistor R25, resistor R26, resistor R27 and LED+, and the other end is connected to GND, which plays a filtering role;The 3rd pins of NMOS transistor Q4, NMOS transistor Q5 and NMOS transistor Q6 are connected to LED1-, and the 2nd pins are connected to the OUT pin of chip U3. When the 1st pin of the NMOS transistor receives the START1 input signal, the control circuit switches according to different frequencies; the EN pin of chip U4 is connected to the EN signal. When the input signal is high level, chip U4 starts. When the input signal is low level, chip U4 shuts down.

[0086] The above-mentioned power supply circuit includes resistor R36, electrolytic capacitor CE5, electrolytic capacitor CE6, zener diode ZD1, voltage regulator chip U5 (model number HT7533) and type-C female socket J1. The specific circuit connection is as Figure 5 shown. The specification of resistor R36 is 4.7K / 1206; the specifications of electrolytic capacitor CE5 and electrolytic capacitor CE6 are both 10uF / 50V; the specification of zener diode ZD1 is 5V.

[0087] One end of resistor R36 is connected to the VCC power input terminal, the VBUS, CC1 and CC2 pins of type-C female socket J1, and the other end is connected to the VIN pin of chip U5 and the positive electrode of electrolytic capacitor CE5, playing a current limiting role; the negative electrode of electrolytic capacitor CE5 is connected to GND, playing a filtering role; the positive electrode of electrolytic capacitor CE6 is connected to the VOUT pin of chip U5, the negative electrode of the zener diode and the 3.3V output terminal, and the negative electrode is connected to GND, playing a filtering role; the positive electrode of zener diode ZD1 is connected to GND, and the negative electrode is connected to the positive electrode of electrolytic capacitor CE6, the VOUT pin of chip U5 and the 3.3V output terminal, playing a clamping role to protect the output terminal circuit.

[0088] The above-mentioned main control circuit includes resistor R37, resistor R38, capacitor C20, capacitor C21, capacitor C22, capacitor C23 and main control chip U6 (model number STM32). The specific circuit connection is as Figure 6 shown. The resistance values of resistor R37 and resistor R38 are both 10KΩ; the capacitance values of capacitor C20, capacitor C22 and capacitor C23 are all 0.1uF; the capacitance value of capacitor C21 is 10nF;

[0089] One end of resistor R37 is connected to the NRST pin, and the other end is connected to the 3.3V power input terminal, one end of capacitor C20, one end of capacitor C21 and the VDD pin of chip U6, playing a current limiting role; one end of resistor R38 is connected to the BOOT0 pin, and the other end is connected to one end of capacitor C22, playing a current limiting role; capacitor C20, capacitor C21, capacitor C22 and capacitor C23 all play a filtering role.

[0090] The working principle of the present utility model is:

[0091] The power supply circuit of the present utility model provides a DC voltage of 15V to the LED driving circuit and a DC voltage of 3.3V to the dimming circuit. When the touch spring TOUCH1 is touched, the LED driving circuit U3 works normally, enabling the first path of LEDs to conduct; when the touch spring TOUCH2 is not touched, the touch chip TTP223 provides a low-level analog input signal to the MCU. After the MCU pin detects the signal, it provides a low-level digital signal to the LED push-pull circuit, making the EN pin of the LED driving circuit U4 at a low level, and the second path of LEDs does not conduct. When the touch spring TOUCH2 is touched, the touch chip TTP223 provides a high-level analog input signal to the MCU. After the MCU pin detects the signal, it provides a high-level digital signal to the LED push-pull circuit, and the EN pin of the LED driving circuit U4 is at a high level, enabling the driving chip U4 to work normally. At the same time, by touching TOUCH1, both paths can be dimmed or turned off simultaneously, and touching TOUCH2 can turn off the second path, thus realizing the application in different scenarios without the need for programming and burning. Meanwhile, the touch dimming circuit controls the conduction of the NMOS. When touching TOUCH1, the touch dimming chip SGL8022W transmits the output signal to the LED circuit through the I / O port of the MCU for direct control without the need to control through the dimming pin of the driving IC.

[0092] The present utility model has been described by the above related embodiments and the accompanying drawings. However, the above embodiments are only examples for implementing the present utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present utility model. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are included in the scope of the present utility model.

Claims

1. A dimming touch control table lamp circuit for an LED driving power supply, characterized in that, It includes a single-channel touch dimming circuit, a single-channel touch non-dimming circuit, an LED driving circuit, an LED push-pull circuit and a main control circuit; the LED driving circuit includes a first LED driving branch and a second LED driving branch; The single-channel touch dimming circuit is electrically connected to the main control circuit, the main control circuit is respectively electrically connected to the first LED driving branch and the second LED driving branch, and the enable terminal of the first LED driving branch is set to a long-term effective state; The single-channel touch non-dimming circuit is electrically connected to the main control circuit, and the main control circuit is electrically connected to the enable terminal of the second LED driving branch through the LED push-pull circuit; both the first LED driving branch and the second LED driving branch are used to be electrically connected to the LED lamp of the table lamp.

2. The dimming touch desk lamp circuit of an LED driving power supply according to claim 1, characterized in that The single-channel touch dimming circuit includes a chip U1 and a touch spring TOUCH1; The fifth pin of the chip U1 is electrically connected to the touch spring TOUCH1, the seventh pin of the chip U1 is electrically connected to the eighth pin of the main control chip U6 of the main control circuit, and the ninth pin of the main control chip U6 of the main control circuit is respectively electrically connected to the first LED driving branch and the second LED driving branch.

3. The dimming touch control table lamp circuit of an LED driving power supply according to claim 2, characterized in that, The first LED driving branch includes a chip U3 and a first MOS unit; The enable terminal of the chip U3 is connected to the power supply terminal, the output pin of the chip U3 is electrically connected to the source of the first MOS unit, the ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the first MOS unit, and the drain of the first MOS unit is electrically connected to the LED lamp of the table lamp.

4. The dimming touch control table lamp circuit of an LED driving power supply according to claim 3, characterized in that, The first MOS unit includes a MOS transistor Q1, a MOS transistor Q2 and a MOS transistor Q3; The sources of the MOS transistor Q1, the MOS transistor Q2 and the MOS transistor Q3 are all electrically connected to the output pin of the chip U3, the gates of the MOS transistor Q1, the MOS transistor Q2 and the MOS transistor Q3 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit, and the drains of the MOS transistor Q1, the MOS transistor Q2 and the MOS transistor Q3 are all electrically connected to the LED lamp of the table lamp.

5. The dimming touch desk lamp circuit of an LED driving power supply according to claim 1, characterized in that, The single-channel touch non-dimming circuit includes a chip U2 and a touch spring TOUCH2; The third pin of the chip U2 is electrically connected to the touch spring TOUCH2, the first pin of the chip U2 is electrically connected to the seventh pin of the main control chip U6 of the main control circuit, and the tenth pin of the main control chip U6 of the main control circuit is electrically connected to the LED push-pull circuit.

6. The dimming touch desk lamp circuit of an LED driving power supply according to claim 5, wherein, The LED push-pull circuit includes a triode Q7, a triode Q8 and a triode Q9; The tenth pin of the main control chip U6 of the main control circuit is electrically connected to the base of the triode Q7, the collector of the triode Q7 is respectively electrically connected to the bases of the triode Q8 and the triode Q9, and the emitter of the triode Q8 and the collector of the triode Q9 are electrically connected and electrically connected to the enable terminal of the second LED driving branch.

7. The dimming touch desk lamp circuit of an LED driving power supply according to claim 6, characterized in that, Both the triode Q7 and the triode Q8 are NPN type, and the triode Q9 is PNP type.

8. The dimming touch desk lamp circuit of an LED driving power supply according to claim 6, characterized in that, The second LED driving branch includes a chip U4 and a second MOS unit; The enable terminals of the chip U4 are respectively connected to the emitter of the triode Q8 and the collector of the triode Q9. The output pin of the chip U4 is electrically connected to the source of the second MOS unit. The ninth pin of the main control chip U6 of the main control circuit is electrically connected to the gate of the second MOS unit. The drain of the second MOS unit is electrically connected to the LED lamp of the table lamp.

9. The dimming touch desk lamp circuit of an LED driving power supply according to claim 8, characterized in that, The second MOS unit includes MOS transistors Q4, Q5, and Q6. The sources of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the output pin of the chip U4. The gates of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the ninth pin of the main control chip U6 of the main control circuit. The drains of the MOS transistor Q4, the MOS transistor Q5, and the MOS transistor Q6 are all electrically connected to the LED lamp of the table lamp.

10. The dimming touch control table lamp circuit of an LED driving power supply according to claim 1, characterized in that, It further includes a power supply circuit, and the power supply circuit is respectively electrically connected to the single-channel touch dimming circuit, the single-channel touch non-dimming circuit, the LED driving circuit, the LED push-pull circuit, and the main control circuit.

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