Energy-saving low-voltage control circuit

Abstract

The utility model relates to the technical field of low-voltage control circuits, in particular to an energy-saving low-voltage control circuit, which comprises a power supply circuit, the power supply circuit comprises a DC 12V voltage and a first filter circuit, and the input end of the first filter circuit is electrically connected with the DC 12V voltage; a voltage conversion circuit, wherein the voltage conversion circuit comprises a TPS54229E chip and a peripheral circuit of the TPS54229E chip; the second pin of the TPS 54229E chip and the ninth pin of the TPS 54229E chip are electrically connected with the output end of the first filter circuit, and the ninth pin of the TPS 54229E chip is connected with the ground.

Description

TECHNICAL FIELD

[0001] The utility model relates to low pressure control circuit technical field, concretely is a kind of energy-saving low pressure control circuit. BACKGROUND

[0002] Low pressure control circuit refers to in low pressure environment, through various control elements realizes the control, protection, adjustment etc.

[0003] Therefore, low pressure control circuit is widely applied in existing household appliances, but the voltage output of general low pressure control circuit is fixed, if different voltage output is required, then voltage conversion circuit needs to be designed additionally, thereby the original circuit electric energy is wasted. SUMMARY

[0004] The utility model provides a kind of energy-saving low pressure control circuit, and the output of adjusting voltage is matched with the working voltage of corresponding appliance to realize energy saving, so as to solve the above problems.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of energy-saving low pressure control circuit, comprising:

[0007] Power supply circuit, the power supply circuit includes DC12V voltage, first filter circuit, the input of the first filter circuit is electrically connected with the DC12V voltage;

[0008] Voltage conversion circuit, the voltage conversion circuit includes TPS54229E chip and the peripheral circuit of TPS54229E chip;The 2 pin of the TPS54229E chip, the 9 pin of TPS54229E chip is electrically connected with the output of the first filter circuit respectively, and the 9 pin of the TPS54229E chip is grounded;

[0009] First voltage output circuit, the first voltage output circuit includes adjustable resistance R1, resistance R2, resistance R3, capacitor C4, VOUT1;The one end of adjustable resistance R1, the one end of resistance R2, the one end of capacitor C4 are electrically connected with the 5 pin of TPS54229E chip, and the other end of adjustable resistance R1 is electrically connected with VOUT1 through resistance R3, the other end of resistance R2 is grounded, and the other end of capacitor C4 is electrically connected with the other end of adjustable resistance R1.

[0010] As the preferred scheme of the utility model, the energy-saving low-voltage control circuit still includes second voltage output circuit, the second voltage output circuit includes voltage stabilizing diode D1, capacitor C8, resistance R6, capacitor C8, inductance L1, capacitor C9, capacitor C10, capacitor C11, VOUT2;The one end of voltage stabilizing diode D1, the one end of capacitor C8, the one end of inductance L1 all are electrically connected with the 3 pin of TPS54229E chip, and the other end of voltage stabilizing diode is grounded, and the other end of capacitor C8 is grounded through resistance R6, and the other end of inductance L1 all are electrically connected with the one end of capacitor C9, the one end of capacitor C10, the one end of capacitor C11, VOUT2, and the other end of capacitor C9, the other end of capacitor C10, the other end of capacitor C11 all are grounded.

[0011] As the preferred scheme of the utility model, the inductance L1 is 4.7uH, the capacitor C9 is 20uF, the capacitor C10 is 20uF, and the capacitor C11 is 20uF.

[0012] As the preferred scheme of the utility model, the adjustable resistance R1 is 6.81kΩ to 12KΩ, the resistance R2 is 2.2kΩ, C4 is 5pF, and the resistance R3 is 0Ω.

[0013] As the preferred scheme of the utility model, the first filter circuit includes capacitor C1, capacitor C2 and capacitor C3, one end of the capacitor C1, one end of the capacitor C2 and one end of the capacitor C3 are electrically connected with one end of the DC12V voltage, and one end of the capacitor C1, one end of the capacitor C2 and one end of the capacitor C3 are also electrically connected with the 3 pin of the PS54229E chip, and the other end of the capacitor C1, the other end of the capacitor C2 and the other end of the capacitor C3 are grounded.

[0014] As the preferred scheme of the utility model, the capacitor C1 is 10uF, the capacitor C2 is 10uF, and the capacitor C3 is 10uF.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In the utility model, when DC12V voltage, then the more smooth DC12V voltage is obtained by the first filter circuit filtering, and the TPS54229E chip is supplied, then the 5 pin of the TPS54229E chip outputs 0.765V, and the voltage value of VOUT1 can be adjusted from DC1V voltage to DC5V voltage by adjustable resistance R1 resistance adjustment, and the specific voltage calculation of VOUT1 is: VOUT1=0.765*(1+R1 / R2);Therefore, different voltage values can be obtained by such design, so that different household appliances can be matched for power supply work, that is, the energy-saving effect is achieved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the circuit working principle of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] For an example, please refer to... Figure 1 This utility model provides a technical solution:

[0020] An energy-saving low-voltage control circuit includes:

[0021] A power supply circuit, the power supply circuit including a DC12V voltage and a first filter circuit, the input terminal of the first filter circuit being electrically connected to the DC12V voltage;

[0022] A voltage conversion circuit, comprising a TPS54229E chip and peripheral circuitry of the TPS54229E chip; pin 2 and pin 9 of the TPS54229E chip are electrically connected to the output of the first filter circuit, and pin 9 of the TPS54229E chip is grounded.

[0023] The first voltage output circuit includes an adjustable resistor R1, a resistor R2, a resistor R3, a capacitor C4, and a VOUT1. One end of the adjustable resistor R1, one end of the resistor R2, and one end of the capacitor C4 are all electrically connected to pin 5 of the TPS54229E chip. The other end of the adjustable resistor R1 is electrically connected to VOUT1 via the resistor R3. The other end of the resistor R2 is grounded. The other end of the capacitor C4 is electrically connected to the other end of the adjustable resistor R1.

[0024] Wherein, the adjustable resistor R1 is set to 6.81kΩ to 12KΩ, the resistor R2 is set to 2.2kΩ, the C4 is 5pF, and the resistor R3 is set to 0Ω;

[0025] Specifically, when the voltage is DC12V, it is filtered by the first filter circuit to obtain a smoother DC12V voltage, which supplies the TPS54229E chip to work. Then, pin 5 of the TPS54229E chip outputs 0.765V. In addition, the voltage value of VOUT1 can be adjusted from DC1V to DC5V by adjusting the adjustable resistor R1. The specific calculation of VOUT1 is: VOUT=0.765*(1+R1 / R2). That is, when the adjustable resistor R1 is adjusted to 12KΩ and the resistor R2 is 2.2kΩ, then VOUT1=0.765*(1+12 / 2.2)≈5V. Therefore, by adjusting the resistor R1, different voltage values ​​can be obtained, which can match the power supply of different household appliances, thus achieving the effect of energy saving.

[0026] Reference Figure 1 In this embodiment, the energy-saving low-voltage control circuit further includes a second voltage output circuit, which includes a Zener diode D1, a capacitor C8, a resistor R6, an inductor L1, a capacitor C9, a capacitor C10, a capacitor C11, and a VOUT2. One end of the Zener diode D1, one end of the capacitor C8, and one end of the inductor L1 are electrically connected to pin 3 of the TPS54229E chip. The other end of the Zener diode is grounded. The other end of the capacitor C8 is grounded through the resistor R6. The other end of the inductor L1 is electrically connected to one end of the capacitors C9, C10, and C11, and to VOUT2. The other ends of the capacitors C9, C10, and C11 are all grounded. The inductor L1 is set to 4.7uH, the capacitor C9 is set to 20uF, the capacitor C10 is set to 20uF, and the capacitor C11 is set to 20uF.

[0027] Specifically, when the voltage is DC 12V, it is filtered by the first filter circuit to obtain a smoother DC 12V voltage, which supplies the TPS54229E chip to operate. Pin 5 of the TPS54229E chip outputs 0.765V. Furthermore, the voltage value of VOUT1 can be adjusted from DC 1V to DC 5V by adjusting the adjustable resistor R1. The specific calculation for VOUT1 is: VOUT = 0.765 * (1 + R1 / R2), meaning that when the adjustable resistor R1 is adjusted to 12KΩ... When the resistor R2 is 2.2kΩ, and VOUT1 = 0.765*(1+12 / 2.2)≈5V, the output of pin 3 of the TPS54229E chip will also change to obtain a DC 5V voltage as the voltage of VOUT1 changes. After being regulated by the Zener diode D1 and filtered by capacitors C9, C10, and C11, VOUT2 will also obtain a smooth DC 5V voltage output, thus realizing another voltage output, that is, realizing the output of two voltages, VOUT1 and VOUT2.

[0028] Referring to Figure 1 In the embodiment, the first filter circuit comprises a capacitor C1, a capacitor C2 and a capacitor C3; one end of the capacitor C1, one end of the capacitor C2 and one end of the capacitor C3 are electrically connected with one end of a DC 12V voltage, and the one end of the capacitor C1, the one end of the capacitor C2 and the one end of the capacitor C3 are also electrically connected with a 3-pin of a PS54229E chip; the other end of the capacitor C1, the other end of the capacitor C2 and the other end of the capacitor C3 are grounded; the capacitor C1 is set to 10uF, the capacitor C2 is set to 10uF, and the capacitor C3 is set to 10uF;

[0029] Specifically, when the DC 12V voltage, the DC 12V voltage is filtered through the capacitor C1, the capacitor C2 and the capacitor C3 to obtain a more smooth DC 12V voltage, which is supplied to the PS54229E chip to work, so that the circuit can work stably.

[0030] Working principle of the utility model:

[0031] When the DC 12V voltage, the DC 12V voltage is filtered through the first filter circuit to obtain a more smooth DC 12V voltage, which is supplied to the PS54229E chip to work, then the 5-pin of the PS54229E chip outputs 0.765V, and the voltage value of VOUT1 can be adjusted from DC 1V voltage to DC 5V voltage through adjustable resistance R1 resistance adjustment, and the voltage of VOUT1 is calculated as: VOUT=0.765*(1+R1 / R2), that is, when the adjustable resistance R1 resistance is adjusted to 12KΩ, and the resistance R2 is 2.2kΩ;

[0032] Then VOUT1=0.765*(1+12 / 2.2)≈5V, then the 3-pin of the PS54229E chip outputs DC 5V voltage which changes with the voltage of VOUT1, then VOUT2 also obtains a smooth DC 5V voltage output through the voltage stabilization of the zener diode D1 and the filtering of the capacitor C9, the capacitor C10 and the capacitor C11, so that another voltage output is realized, that is, the two-way voltage output of VOUT1 and VOUT2 is realized.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An energy saving low voltage control circuit, characterized by: The energy-saving low-voltage control circuit comprises a power supply circuit, a voltage conversion circuit, a first voltage output circuit and a second voltage output circuit. The power supply circuit comprises a DC 12V voltage and a first filter circuit, and an input end of the first filter circuit is electrically connected with the DC 12V voltage. The voltage conversion circuit comprises a TPS54229E chip and a peripheral circuit of the TPS54229E chip, and a 2-pin of the TPS54229E chip and a 9-pin of the TPS54229E chip are electrically connected with an output end of the first filter circuit respectively, and the 9-pin of the TPS54229E chip is grounded. The first voltage output circuit comprises an adjustable resistor R1, a resistor R2, a resistor R3, a capacitor C4 and VOUT1, one end of the adjustable resistor R1, one end of the resistor R2 and one end of the capacitor C4 are electrically connected with a 5-pin of the TPS54229E chip, the other end of the adjustable resistor R1 is electrically connected with VOUT1 through the resistor R3, the other end of the resistor R2 is grounded, and the other end of the capacitor C4 is electrically connected with the other end of the adjustable resistor R1.

2. The energy-saving low-voltage control circuit according to claim 1, characterized in that: The second voltage output circuit comprises a voltage stabilizing diode D1, a capacitor C8, a resistor R6, an inductor L1, a capacitor C9, a capacitor C10, a capacitor C11 and VOUT2, one end of the voltage stabilizing diode D1, one end of the capacitor C8 and one end of the inductor L1 are electrically connected with a 3-pin of the TPS54229E chip, the other end of the voltage stabilizing diode is grounded, the other end of the capacitor C8 is grounded through the resistor R6, the other end of the inductor L1 is electrically connected with one end of the capacitor C9, one end of the capacitor C10, one end of the capacitor C11 and VOUT2, and the other end of the capacitor C9, the other end of the capacitor C10 and the other end of the capacitor C11 are grounded.

3. The energy saving low voltage control circuit according to claim 2, wherein: The inductor L1 is 4.7uH, the capacitor C9 is 20uF, the capacitor C10 is 20uF, and the capacitor C11 is 20uF.

4. The energy saving low voltage control circuit according to claim 1, wherein: The adjustable resistor R1 is 6.81kΩ-12KΩ, the resistor R2 is 2.2kΩ, the capacitor C4 is 5pF, and the resistor R3 is 0Ω.

5. The energy saving low voltage control circuit according to claim 1, wherein: The first filter circuit comprises a capacitor C1, a capacitor C2 and a capacitor C3, one end of the capacitor C1, one end of the capacitor C2 and one end of the capacitor C3 are electrically connected with one end of the DC 12V voltage, and one end of the capacitor C1, one end of the capacitor C2 and one end of the capacitor C3 are also electrically connected with a 3-pin of the TPS54229E chip, and the other end of the capacitor C1, the other end of the capacitor C2 and the other end of the capacitor C3 are grounded.

6. The energy saving low voltage control circuit according to claim 5, wherein: The capacitor C1 is 10uF, the capacitor C2 is 10uF, and the capacitor C3 is 10uF.

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