Low-power-consumption power supply circuit capable of outputting wide voltage

Abstract

The utility model discloses a low-power-consumption power supply circuit capable of outputting wide voltage. The low-power-consumption power supply circuit comprises a voltage doubling circuit module A, a voltage doubling circuit module B, a linear voltage stabilizing circuit and a switching power supply, wherein the voltage doubling circuit module A is connected with the transformer winding N2, and the voltage doubling circuit module A comprises a capacitor C1, a resistor R1, a diode D1 and a diode D2 which are connected in series; the first boost module is used for generating first boost output when output voltage is lower than a preset value; according to the low-power-consumption power supply circuit capable of outputting the wide voltage, when the change range of the chip VCC power supply voltage is wide, the power consumption of the power supply circuit is reduced, and meanwhile, the conversion efficiency of a product is improved.

Description

Technical Field

[0001] This utility model relates to the field of power supply circuit technology, specifically a low-power power supply circuit with wide output voltage. Background Technology

[0002] A circuit, also known as an electronic circuit, is a network of electrical devices and components connected in a specific way to provide a path for the flow of electrical charge. It is also called an electronic circuit or electrical circuit, or simply a network or circuit. Examples include networks composed of resistors, capacitors, inductors, diodes, transistors, and switches.

[0003] In existing technologies, a wide range of VCC power supply voltage variations in the chip increases the power consumption of the power supply circuit and reduces the conversion efficiency of the product. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] 1. Technical problems to be solved:

[0006] To address the issue that a wide variation range of the chip's VCC power supply voltage increases the power consumption of the power supply circuit and reduces the product's conversion efficiency, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a low-power power supply circuit with a wide output voltage, which solves the problem of reducing the power consumption of the power supply circuit when the chip's VCC power supply voltage varies over a wide range, while improving the conversion efficiency of the product.

[0008] 2. Technical Solution:

[0009] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0010] A low-power power supply circuit with a wide output voltage range includes a voltage doubler circuit module A, a voltage doubler circuit module B, a linear voltage regulator circuit, and a switching power supply; wherein:

[0011] The voltage multiplier circuit module A is connected to the transformer winding N2. The voltage multiplier circuit module A includes a capacitor C1, a resistor R1, a diode D1, and a diode D2 connected in series; it is used to generate a first boost output when the output voltage is lower than a preset value.

[0012] The voltage multiplier circuit module B is connected to the transformer winding N1. The voltage multiplier circuit module B includes a capacitor C3, a resistor R3, a diode D3, and a diode D4 connected in series; it is used to generate a second boost output when the output voltage is higher than a preset value.

[0013] The linear voltage regulator circuit includes transistor Q1, resistor R2 and Zener diode ZD1. The input terminal of the linear voltage regulator circuit is connected to the output terminals of voltage multiplier circuit module A and voltage multiplier circuit module B, respectively. The output terminal of the linear voltage regulator circuit is connected to energy storage capacitor EC2 through diode D5.

[0014] Specifically, when the output voltage is lower than a preset value, the voltage multiplier circuit module A is activated and supplies power to the linear voltage regulator circuit, and the output voltage of the voltage multiplier circuit module B is lower than the breakdown voltage of the Zener diode ZD1 and is cut off; when the output voltage is higher than the preset value, the voltage multiplier circuit module B is activated and supplies power to the linear voltage regulator circuit, and the output voltage of the voltage multiplier circuit module A is limited and cut off by the linear voltage regulator circuit.

[0015] The switching power supply includes a primary chip, and the supply voltage of the primary chip comes from the coupling of the transformer winding N2 and the transformer winding N1.

[0016] As a preferred embodiment of the low-power power supply circuit with wide output voltage according to this utility model, the primary chip requires a stable 20V power supply.

[0017] As a preferred embodiment of the low-power power supply circuit with wide output voltage of this utility model, when the chip power supply output voltage is 5V, the chip power supply voltage needs to meet 10V. The transformer winding N2 will charge the EC1 capacitor through the voltage multiplier circuit module A: capacitor C1, resistor R1, diode D1, and diode D2, and then charge the EC2 capacitor through the linear voltage regulator circuit transistor Q1, resistor R2, Zener diode ZD1, and diode D5, thus supplying power to the VCC pin of the power supply chip.

[0018] As a preferred embodiment of the low-power power supply circuit with wide output voltage of this utility model, the voltage obtained by the transformer winding N1 winding through the voltage multiplier circuit capacitor C3, resistor R3, diode D3, and diode D4 is lower than the regulated voltage of Zener diode ZD1 (12V) and therefore does not work.

[0019] As a preferred embodiment of the low-power power supply circuit with wide output voltage of this utility model, the chip VCC power supply is provided by the transformer winding N2 winding and the voltage multiplier circuit module A, while the voltage multiplier circuit module B does not work.

[0020] As a preferred embodiment of the low-power power supply circuit with wide output voltage of this utility model, the switching power supply is 48V, and the transformer winding N1 winding will obtain a DC voltage through the voltage multiplier circuit module B: capacitor C3, resistor R3, diode D3, and diode D4, which is higher than the regulated voltage of Zener diode ZD1 by 12V, so that diode D5 is reverse cut off.

[0021] As a preferred embodiment of the low-power power supply circuit with wide output voltage of this utility model, the chip VCC power supply is provided by the transformer winding N1 and the voltage multiplier circuit module B. At this time, the transformer winding N2 outputs a high voltage, but after passing through the linear voltage regulator circuit, it obtains a lower voltage and does not supply power to the chip. The transformer winding N2 is in a no-load current state.

[0022] 3. Beneficial effects:

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] This low-power power supply circuit with a wide output voltage range solves the problem of reducing power consumption and improving product conversion efficiency when the chip's VCC power supply voltage varies over a wide range. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0026] Figure 1 This is a schematic diagram of a low-power power supply circuit with a wide output voltage according to the present invention. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, deviating from the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0029] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0032] This utility model provides an overall structural schematic diagram of an embodiment of a low-power supply circuit with a wide output voltage range, including:

[0033] Please see Figure 1 This embodiment of a low-power power supply circuit with a wide output voltage range includes a voltage doubler circuit module A, a voltage doubler circuit module B, a linear voltage regulator circuit, and a switching power supply; wherein:

[0034] The voltage multiplier circuit module A is connected to the transformer winding N2. The voltage multiplier circuit module A includes a capacitor C1, a resistor R1, a diode D1, and a diode D2 connected in series; it is used to generate a first boost output when the output voltage is lower than a preset value.

[0035] The voltage multiplier circuit module B is connected to the transformer winding N1. The voltage multiplier circuit module B includes a capacitor C3, a resistor R3, a diode D3, and a diode D4 connected in series; it is used to generate a second boost output when the input voltage is higher than a preset value.

[0036] The linear voltage regulator circuit includes transistor Q1, resistor R2 and Zener diode ZD1. The input terminal of the linear voltage regulator circuit is connected to the output terminals of voltage multiplier circuit module A and voltage multiplier circuit module B, respectively. The output terminal of the linear voltage regulator circuit is connected to energy storage capacitor EC2 through diode D5.

[0037] Specifically, when the output voltage is lower than a preset value, the voltage multiplier circuit module A is activated and supplies power to the linear voltage regulator circuit, and the output voltage of the voltage multiplier circuit module B is lower than the breakdown voltage of the Zener diode ZD1 and is cut off; when the output voltage is higher than the preset value, the voltage multiplier circuit module B is activated and supplies power to the linear voltage regulator circuit, and the output voltage of the voltage multiplier circuit module A is limited and cut off by the linear voltage regulator circuit.

[0038] The switching power supply includes a primary chip, and the supply voltage of the primary chip comes from the coupling of the transformer winding N2 and the transformer winding N1.

[0039] It is worth noting that the primary chip requires a stable 20V power supply.

[0040] Next, specifically, when the chip power supply output voltage is 5V, the chip power supply voltage needs to meet 10V. The transformer winding N2 will charge the EC1 capacitor through the voltage multiplier circuit module A: capacitor C1, resistor R1, diode D1, and diode D2. Then, it will charge the EC2 capacitor through the linear voltage regulator circuit transistor Q1, resistor R2, Zener diode ZD1, and diode D5, thus supplying power to the VCC pin of the power supply chip.

[0041] Meanwhile, the voltage obtained by the transformer winding N1 through the voltage multiplier circuit capacitor C3, resistor R3, diode D3, and diode D4 is lower than the 12V voltage regulated by the Zener diode ZD1 and therefore does not work.

[0042] Furthermore, the chip's VCC power supply will be provided by the transformer winding N2 and the voltage multiplier circuit module A, while the voltage multiplier circuit module B will not operate.

[0043] Next, the switching power supply is 48V, and the transformer winding N1 will obtain a DC voltage through the voltage multiplier circuit module B: capacitor C3, resistor R3, diode D3, and diode D4, which is higher than the regulated voltage of Zener diode ZD1 by 12V, causing diode D5 to be reverse cut off.

[0044] Finally, the chip's VCC power supply is provided by the transformer winding N1 and the voltage multiplier circuit module B. At this time, the transformer winding N2 outputs a high voltage, but after passing through the linear voltage regulator circuit, it obtains a lower voltage and does not supply power to the chip. The transformer winding N2 is in a no-load current state.

[0045] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0046] Combination Figure 1 The specific usage process of this embodiment of a low-power power supply circuit with wide output voltage is as follows:

[0047] 1. When the output voltage of the switching power supply / charger is wide, such as 5V-48V, the supply voltage of the primary chip of the switching power supply / charger comes from the transformer winding coupling, and the supply voltage range also varies widely. Since the chip power supply requires a stable voltage of 10V-30V, when the output voltage is 5V, the chip supply voltage needs to meet 10V. The N2 winding will charge the capacitor C1 connected in series through the voltage doubler circuit module A: capacitor C1, resistor R1, diode D1, and diode D2. Then, through the linear regulator circuit transistor Q1, resistor R2, diode D1, and diode D5, it will charge the EC2 capacitor, supplying power to the VCC pin of the power supply chip. The voltage obtained by the transformer winding N1 winding through the voltage doubler circuit capacitor C3, resistor R3, diode D3, and diode D4 is lower than the regulated voltage of diode D1 (12V) and therefore does not work. The chip VCC power supply will be provided by the transformer winding N2 winding and the voltage doubler circuit module A; the voltage doubler circuit module B will not work.

[0048] 2. When the output voltage of the switching power supply / charger is high, such as 48V, the transformer winding N1 will obtain a DC voltage through the voltage multiplier circuit module B: capacitor C3, resistor R3, diode D3, and diode D4. This voltage is higher than the 12V regulated voltage of diode D1, causing diode D5 to be reverse-biased and cut off. The chip's VCC power supply is provided by the N1 winding and the voltage multiplier circuit module B. At this time, the transformer winding N2 outputs a high voltage, but after passing through the linear voltage regulator circuit, it obtains a lower voltage and does not supply power to the chip. The transformer winding N2 is in a no-load current state, thus solving the problem of wide variation in the chip's VCC power supply voltage, reducing the power consumption of the power supply circuit, and improving the product's conversion efficiency.

[0049] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A low-power power supply circuit with a wide output voltage range, comprising a voltage doubler circuit module A, a voltage doubler circuit module B, a linear voltage regulator circuit, and a switching power supply; wherein: The voltage multiplier circuit module A is connected to the transformer winding N2. The voltage multiplier circuit module A includes a capacitor C1, a resistor R1, a diode D1, and a diode D2 connected in series; it is used to generate a first boost output when the output voltage is lower than a preset value. The voltage multiplier circuit module B is connected to the transformer winding N1. The voltage multiplier circuit module B includes a capacitor C3, a resistor R3, a diode D3, and a diode D4 connected in series; it is used to generate a second boost output when the output voltage is higher than a preset value. The linear voltage regulator circuit includes a transistor Q1, a resistor R2, and a Zener diode ZD1. The output terminal of the linear voltage regulator circuit is connected to the output terminals of voltage multiplier circuit module A and voltage multiplier circuit module B, respectively. The output terminal of the linear voltage regulator circuit is connected to the energy storage capacitor EC2 through a diode D5. Specifically, when the output voltage is lower than a preset value, the voltage multiplier circuit module A is activated and supplies power to the linear voltage regulator circuit, and the output voltage of the voltage multiplier circuit module B is lower than the breakdown voltage of the Zener diode ZD1 and is cut off; when the output voltage is higher than the preset value, the voltage multiplier circuit module B is activated and supplies power to the linear voltage regulator circuit, and the output voltage of the voltage multiplier circuit module A is limited and cut off by the linear voltage regulator circuit. The switching power supply includes a primary chip, and the supply voltage of the primary chip comes from the transformer winding N2 and the transformer winding N1 coupled together.

2. The low power supply circuit outputting a wide voltage according to claim 1, characterized by, The primary chip requires a stable 20V power supply.

3. The low power supply circuit outputting a wide voltage according to claim 2, characterized by, When the chip power supply output voltage is 5V, the chip power supply voltage needs to meet 10V. The transformer winding N2 will charge the EC1 capacitor through the voltage multiplier circuit module A: capacitor C1, resistor R1, diode D1, and diode D2, and then charge the EC2 capacitor through the linear voltage regulator circuit transistor Q1, resistor R2, Zener diode ZD1, and diode D5, thus supplying power to the VCC pin of the power supply chip.

4. The low power supply circuit outputting a wide voltage according to claim 3, characterized by, The voltage obtained by the transformer winding N1 through the voltage multiplier circuit capacitor C3, resistor R3, diode D3, and diode D4 is lower than the 12V voltage regulated by the Zener diode ZD1, so it does not work.

5. The low power supply circuit outputting a wide voltage according to claim 4, characterized by, The chip's VCC power supply will be provided by the transformer winding N2 and voltage multiplier circuit module A, while voltage multiplier circuit module B will not operate.

6. The low power supply circuit outputting wide voltage according to claim 4, wherein, The switching power supply is 48V. The transformer winding N1 will obtain a DC voltage through the voltage multiplier circuit module B: capacitor C3, resistor R3, diode D3, and diode D4. This voltage is higher than the 12V regulated voltage of the Zener diode ZD1, causing diode D5 to be reverse-biased and cut off.

7. The low power supply circuit outputting wide voltage according to claim 4, wherein, The chip's VCC power supply is provided by the transformer winding N1 and the voltage multiplier circuit module B. At this time, the transformer winding N2 outputs a high voltage, but after passing through the linear voltage regulator circuit, it obtains a lower voltage and does not supply power to the chip. The transformer winding N2 is in a no-load current state.

Images